ISSN: 2455-488X
Journal of Civil Engineering and Environmental Sciences
Review Article       Open Access      Peer-Reviewed

An Overview: Organic Waste Management by Earthworm

Visuvasam Motcha Rakkini1*, Savariar Vincent1, Anbalagan Santhosh Kumar1 and Kathirvelu Baskar2*

1Center for Environmental Research & Development (CERD), Loyola Institute of Frontier Energy (LIFE) and PG & Research Department of Advanced Zoology & Biotechnology, Loyola College, Chennai- 600034, Tamil Nadu, India
2Optimurz Bio & IT Solutions, Shenoy Nagar West, Chennai- 600 030, Tamil Nadu, India
*Corresponding author: Kathirvelu Baskar, Optimurz Bio & IT Solutions, Shenoy Nagar West, Chennai- 600 030, Tamil Nadu, India, E- Mail: suribaskar@hotmail.com

Visuvasam Motcha Rakkini, Center for Environmental Research & Development (CERD), Loyola Institute of Frontier Energy (LIFE) and PG & Research Department of Advanced Zoology & Biotechnology, Loyola College, Chennai- 600034, Tamil Nadu, India, E-Mail: ponniantony23@gmail.com

Accepted: 11 April, 2017 | Received: 27 April, 2017 | Published: 28 April, 2017
Keywords: Organic waste; Vermicompost; Earthworms; N; P; K; Plant growth

Cite this as

Rakkini VM, Vincent S, Kumar AS, Baskar K (2017) An Overview: Organic Waste Management by Earthworm. J Civil Eng Environ Sci 3(1): 013-017. DOI: 10.17352/2455-488X.000015

Vermicomposting is a biotechnological process, in which organic materials converted as valuable product by earthworms. The nutrient profile of vermicompost is higher than traditional compost. The vermicompost alters the soil fertility in different ways, such as better aeration, porosity, bulk density, water holding capacity, pH, electrical conductivity, nitrogen, phosphorous and potassium content. The application of the vermicompost is enriches the soil microorganism, plant growth (size of leaf, height, width and weight) and nutrient content of the yield. The high concentrations of vermicompost may delay plant growth due to the concentration of soluble salts. As a result, vermicomposts should be applied at required quantity to produced higher yield. In this overview describe about the organic waste management, vermicompost, earthworms species and economical importance of the vermicompost.

Introduction

The habitations of human beings and animals generate huge load of organic wastes and their decomposition products affect the quality of soil, air and water. Much of the biosolid wastes are highly infectious as they contain an array of pathogenic microorganisms. Their disposal into the environment without prior disinfection causes health and environmental risks. The animal and municipal waste change the soil character, including pH, bulk density, conductivity, water holding capacity and increased the organic carbon content [1].

The management of biosolid wastes is gaining importance for not only providing clean and healthy environment but also enhancing the primary productivity through soil quality improvement. Composting is the widely accepted process for the recycle in organic wastes; the direct land application of raw wastes or poorly stabilized materials caused toxicity and pathogenicity towards land [2]. Composting is the biological transformation of organic matter into a well-stabilized product through the fast succession of microbial populations under aerobic conditions. The process results in mineralization of organic matter into carbon dioxide and transformation into humic substances [3].

Kumar et al. [4], reported that most of the Indian cities are threading by environmental problem due to solid waste. The solid waste creates many problems in raining season by blocking the running water. Many ways solid waste were managed viz., incineration, composting, gasification, refuse derived fuel (RDF). The organic solid was pulverization and converted into vermicompost; used as fertilizer with economical worth of 9.36 lakhs/year. Sequeira and Chandrashekar [5], reported that household waste of food, paper, vegetable and garden (grass and leaves) with cow dung were converted as vermicompost by Eudrilus sp.; the compost having rich beneficial microbial community of bacteria, fungi, actinomycetes, Pseudomonads, P- Solubilizers and N2 Fixers. Indiscriminate uses of synthetic chemicals leads to many problems in agroecosytem and affect the non-target organism. Aali et al. [6], reported that agricultural industry waste such as sheep manure, pomegranate peels, mushroom, chopped corn, sugar beet pulp and sawdust were used as raw material for vermibed; and the obtained compost reduced the electrical conductivity, raising pH, and NPK of treated land and act as fertilizer.

Vermicomposting, is a bio-oxidative process in which earthworms interact intensively with micro-organisms in the decomposer community, accelerating the organic matter by stabilization with modified physical and biochemical properties. Vermicomposting differs from conventional composting because the organic material is processed by the digestive systems of earthworms. The digested casts can be used to improve the fertility and physical characteristics of soil. In this process, the earthworms actively participate in the degradation of organic matter by physical and biochemical action. Physical participation in degrading of organic substrates results in fragmentation, for increasing the surface area to action and aeration. Conversely, biochemical changes in the degradation of organic matter are carried out by microorganisms through enzymatic digestion, enrichment by nitrogen excrement and transport of inorganic and organic materials. The earthworms contribute significantly in the recycling of organic waste and production of organic manure with high humic contents, which are helpful to maintenance the soil structure, aeration and fertility. The bioactive substances present in the humic acid fertilizer can enhance physiological metabolism, growth, yield, seed germination etc., while these features are absent in ordinary fertilizers. Applying humic acid fertilizer can also effectively increase the anti-drought and ant frigidity potential of crops, and prevent underground plant diseases, insect pests and pathogenic bacteria. The present reviews describe about various aspects involved in vermicomposting of organic waste by different species of worm.

Biology of earthworm

Earthworms are invertebrates of agro ecosystem, belonging to the family lumbricidae, both male and female reproductive organs present in single earthworm, hermaphrodites. At the time of eggs laying, the sexually mature worms contain a distinctive epidermal ring shaped area called, clitellum, which has gland cells that secrete material to form a viscid, girdle like structure known as cocoon. The number of fertilized ova in each cocoon have 1-20 lumbricid worms. There were about 3000 species of earthworms distributed all over world and about 384 species were reported in India [7].

Vermicomposting characteristics and process

It is an aerobic, bioxidation and stabilization non-thermophilic process of organic waste decomposition that depends upon fragments by earthworms, mix and promotes microbial activity [8]. It is a peat like material with high porosity, aeration, drainage, water holding capacity and microbial activity [9-10]. It also enhanc the resistance of plants against pests and diseases. Earthworms can serve as “nature’s plowman” and form nature’s gift to produce good humus, which is the most precious material to fulfill the nutritional needs of crops [11]. Ramesh et al. [12], reported that organic waste pollution was increased by day to day activities and other side shortage of organic manure, in this connection earthworms were used for conversion of organic waste into vermicompost. Westerman and Bicudo [13], reported that organic waste was used to improve the soil physical and chemical properties with nutrient for cultivation. Nair et al. [14], reported that vermicomposting is a powerful tool for bulk reduction of waste as well as pathogen free vermicompost. The vermicompost reduced the cadmium content of the soil and enrich the soil by maintain the pH, P, K, Na, Ca and microorganism [15]. Shamini et al. [16], reported that in Malaysia produced more than 70% solid waste, while 95% disposed in landfill; it was not properly managed and caused nuisance. Some of the waste was converted as methane by anaerobic; it leave global warming, in this case, earthworm was used for organic waste management without environmental pollution. Tea waste was mixed with soil in different ratio, for conversion as compost by using E. eugeniae. The compost provide rich nutrient with microbial content called as fertilizer. The accumulation of organic waste, threat to the environment in all the continent, the waste would be manage the sustainable way by using anaerobic conditions without affecting ecosystem. It may use for biogas production and energy management for day by day usage [17]. Lim et al. [18], sated that soybean husk and papaya waste were studied in different ratio for waste management with E. eugeniae. Among the different ratio 1:1 was best combination for vermicompost. All the nutrients of ca, K, mg, and p value were increased while C: N ratio decreased after 63 days. Westerman and Bicudo [13], reported that organic waste was used to improve the soil physical and chemical properties with high nutrient for cultivated plant.

Vermicomposting is an important technique of converting organic waste into nutrient rich compost by earthworms without compromising the population of beneficial bacteria. In recent years, many researcher concentrated to study about vermicompost for sustainable agriculture, the organic waste was converted as vermicompost, the compost have high content of NPK, Carbon, nitrogen, beneficial microorganism and growth hormones [19]. Pathma and Sakhivel [8], reported that vermicompost is process of non-thermophilic, bio-oxidative process with help of earthworm and microbes. Compost enhanced the soil fertility by soil biodiversity richness, water holding capacity and growth regulation hormones.

Dhimal et al. [20,21], reported that compost have high microbial content, required pH, organic matter, moisture content, nitrogen, phosphorous, potassium and Carbon : Nitrogen ratio (C:N) value for agricultural practice. Solid waste management is a big issue in our country; the waste was converted into useful agricultural fertilizer by using earthworm [17]. Kumari [22], reported that vermicompost was done with different ratio 1. Soil + cow dung 2. Soil+ vegetable waste + fruit waste, 3. Soil +vegetable waste + fruit waste + cow dung, 4. Soil+ paper waste+ cow dung and their compost were analyzed TP, TK, TOC, TKN, and C: N parameter. The temperature of the compost, between 21-25 ° C, TP (0.11-0.25%), TK (0.19-0.55%), TKN% (0.33-0.77%), TOC (8.03-22.3%), pH (5.9-6.1) and C: N (10.78-31.68%) was recorded during composting period (0-45 days).

The livestock excretes was managed by sustainable way called as vermicompost. Without earthworm, the composting will take energy losses (used number of man power), while using earthworm it breakdown the manure in very fast and would be recyclable; the vermicompost having high amount of nutrient and microbial biomass. Compost is a cost important tool for eco-friendly waste management [23]. Kaouachi et al. [24], stated the obtained vermicompost having increased NPK, calcium, magnesium, sodium and required EC and C/N ratio. Eisenia fetida was used for biodegradable solid waste management and it is ecofriendly waste management without producing any heat. As suggested that small scale (individual house) waste management is easiest way to solid waste management and economically viable. Also the resulted of raw waste was lower than compost pH. The carbon, phosphorus, carbon:nitrogen ratio of the compost was higher than raw waste [25].

Sumi et al. [26], reported that, solid waste management is one of the big environmental issues. The residual and animals waste was pollute the aquatic and terrestrial ecosystem. A quantity of biodegradable solid waste categorized. Such waste modified into environmental safely products by microbial composting, vermicomposting, biogas plant, etc; Vermicompost induced, germination, flowering and fruiting the plants earlier than the control (without vermicompost). The increased micro flora (bacterial and fungal colonies) and NPK content was increased in treatment, when compared to the control. Vermicompost is a simple, cost effective, low maintenance, easy method of waste management. Sadasivuni et al. [27], reported that India reusable organic biomass of 0.7 and 0.8 million tonnes/year. The author stated that potential use areca nut and cocoa waste were managed by vermi technology and without environmental effects; it having higher nutrient than compost; also it induced the soil fertility.

Waste stabilization by vermicomposting

A greenhouse trial was conducted with vermicompost from 1.Raw dairy manure with tobacco residue, 2.yard leaf, 3. Sewage sludge + rice hull, 4. Sewage sludge + yard leaf, and raw dairy manure were evaluated in tomato seedling; all the treatment produced a significant growth than control [28]. Nair et al. [14], reported that kitchen waste was thermo composted for 9 day and converted as vermicompost within 2.5 months. Lokeshwari and Swamy [29], reported that house hold and market vegetable waste were mixed and finally add 0, 10, 20 and 30% of sewage sludge. The mixture was aerobically decomposed for 20 days and E. eugeniae was released. Within 30 days, end product was obtained when compared to windrow composting (80 days).

The agriculture waste and cattle manure with different ratio was prepared as vermibed such as 1. Equal weight of (Penniseumtyphoides and Sorghum vulgare) + sheep manure (1:2 ratio), 2. Vignaradiata+ Triticumaestivum+ cow dung (1:1:2 ratio), 3. Mixed all the plant + cow dung (1:1 ratio) 4. Cattle shed manure for renewal energy by vermicompost. All the compost has rich N (97.3% to 155%), P (67.5% to 123.5%), K (38.3% to 112.9%), and Ca (23.3% to 53.2%), and decrease in organic C (20.4% to 29.0%) [30]. Gurav and Pathade [31], reported that temple organic wastes with cow dung and biogas digester slurry were decomposed for a period of 30 day at 30° C. After, digestion E. eugeniae was introduced at 25° with pH 8.0 and moisture content (80%) should be optimum for high nutrient yield of vermicompost.

Beohar and Srivastava [32], reported that E. fetida and L. mauritii were used for poultry waste management. Both species produced compost 3rd day onwards. E. fetida was performed well when compared to L. mauritii; but there was no significant changes in the soil. Lim et al. [33], sated that soybean husk and papaya waste were studied in different ratio for waste management with E. eugeniae. Among the different ratio 1:1 ratio was best combination for vermicompost. Dhimal et al. [34], reported that Zoo waste were mainly animal dungs, garbage and litter; converted as compost by using earthworm, the composting period was minimum than traditional compost. African earthworm E. eugeniae used as solid waste management. Paper waste contain rich carbon but need nitrogen for that cow dung was used as mixture in different ratio a. 1:1 (paper+ cow dung), b- 2:1 (paper + cow dung), c- 3:1 (paper + cow dung), among the combination 1:1 ratio was best one, the compost was collected up to 65 days excluding 15 days pre digestion. Kaouachi et al. [35], stated that olive wastes was converted as vermicompost by using E. andrei. The obtained vermicompost having increased NPK, calcium, magnesium, sodium and required EC and C/N ratio.

Londhe and Bhosale [36], reported that solid waste was managed by earthworm. The waste called as gold, when it was converted as vermicompost and will not produce any kind of risk to the environment. Different ratio of verminbed were T1, soil + cow dung, (0.5:1), T2, soil+vegetable+fruit waste (1:1), T3, soil+agricultural waste+cow dung (1:1) and T4, soil+paper waste+cow dung (1:1). The vermicompost showed increased potash and nitrogen content. Nag et al. [37], stated that 5-75% of organic solid waste collected from religious area of Patna, Bihar, India; it converted as valuable materials by using E. fedita and E. eugeniae. The result showed that NPK were increased in duration was increased also C/N ratio, carbon% were decreased increasing duration of composting period.

Albasha et al. [38], who have reported that kitchen waste, with combination of cowdung, were predigestion for a period of 15 days. The best compost was obtained in kitchen waste + cowdung (1:1), than Kitchen waste+cowdung (2:1) and Kitchen waste+cowdung (3:1) ratio. The pH value was reduced when duration of the compost collection day increased (0-60 day), total nitrogen (%), phosphorus (%), potassium (%) and carbon: nitrogen ratio were increased considerably. Jain [39], observed that organic solid waste management is major problem in developing countries. Poor management of solid waste is called as environmental pollution. In India most of pilgrims, generated large quantity of waste during the festival. The flower waste was high in some major temple of Jaipur, Rajastan, India. The flower waste was converted as vermicompost with mixture of cattle dung by using E. foetida. The waste was converted as vermicompost with 50% of weight was reduced during the vermicompost process. The compost was at 25°C, 8.0 pH, 1-2 mm particle size, moisture 60%, bulk density were acceptable limit. Also compost reduced EC, C: N ratio, C: P ratio and increase in N, P.K, Ca, Mg, and sulphur. The vermicompost used as fertilizer for tomato plant cultivation it enhanced the growth (stem diameter, height, leaf number, length of roots, yield/plant).

Potential applications of vermicompost in plant growth

Vermicompost (cattle manure) was studied in their efficacy on Petroselinum crispum, the result indicated that vermicompost enhance the size of leaves, plant height and yield [40]. Kizilkaya et al. [41], reported that earthworm play, a vital role in organic waste management by vermicomposting; the vermibed was prepared in different combination by using sewage sludge amended with hazelnut husk and cow dung. After preparation , the E. fetida was introduced in to vermibed and their compost was studied on Triticumaestium; found that all treatment induced the growth and yield of tested plants when compared to control.

Ansari and Hanief [42], reported that every population released considerable amount of organic waste, it is dumping in landfills (burn or river systems). The river was polluted by plant and large amount of market waste daily. While, the waste was converted as vermicompost (30% yield), huge volume was degreased. For the reason earthworm is a main technology transfer for bio-waste into valuable materials. Also it contains beneficial microorganisms (Actinomycetes, Azotobacter, Nitrobacter, Nitrosomonas and Aspergillus) for plant productivity. Karmakar et al. [43], evaluated the effect of vermicompost, chemical fertilizer, 50% manure +50% fertilizer and control on rice field. They found that vermicompost showed good growth and provided maximum nutrient to tested plants.

The increasing population, there is need for fertile lands to cultivation. Mentha arvensis was cultivated under salt stressed conditions in both controlled and field conditions. The fungi Glomus aggregatum and Exiguobacterium oxidotolerans with vermicompost improved plant growth. Also concluded multi-microbial inoculations together with vermicompost as efficient biofertilizers for M. arvensis cultivation [44]. Xu et al. [45], reported that vermicompost had complex effects on the antioxidant enzyme activities of plants; when it was grown under high salinity. The organic waste of industrial sewage sludge and municipal solid waste compost were mixed with cultivated soil. The both treatment increased the organic matter, microbes, but decreased waster holding capacity in industrial waste, in case of the yield industrial waste was higher than municipal waste treated soil [46].

Masullo [47], reported that waste materials was digested by anaerobic condition then converted as vermicompost by using earthworm. While vermicompost applied in the field, it reduced the irrigation frequency and induced the plant growth. The vermicompost from sewage sludge, wood chips mixture with biochar, induced the higher reproductive rate of earthworm (cocoon, juveniles) and reduced the Zn and cd [48]. Maji et al. [49], reported that humic acid rich in vermicompost, is induced the plant height, fresh weight, dry weight. Also maximum number and density of microbes (bacteria, fungi) were recorded when compared to chemical fertilizer. Different species of earthworms was used for production of vermicompost; and is powerful biofertilizer in sustainable agriculture with reduction of chemical agrochemicals. The worms were involved in waste management by and recycling of organic waste [50].

Conclusion

Vermicomposting is a biotechnological process involved by earthworm; the natural bioreactors playing an essential role in the breakdown of organic matter and maintaining soil fertility. The worms involved recycling of organic waste and enhanced plant growth. The importance of vermicompost is further enhanced as it has simultaneously other benefits; excess worms can be used in medicines and as protein rich animal feed. Finally we conclude that vermicompost reduced the pesticide application, low pest infestation, reduction of irrigation frequency and pesticide free high yield.

  1. Khaleel R, Reddy KR, Overcash MR (1981) Changes in soil physical properties due to organic waste applications: A review. J Environ Qual 10: 133-141. Link: https://goo.gl/5363pR
  2. Butler TA, Sikor LPM, Steinhilber L, Douglass LW (2001) Compost Age and Sample Storage Effects on Maturity Indicators of Biosolids Compost. J Environ Qual 30: 2141-2148. Link: https://goo.gl/xBMrJa
  3. Senesi N, Plaza C, Brunetti G, Polo A (2007) A comparative survey of recent results on humic-like fractions in organic amendments and effects on native soil humic substances. Soil Biol Biochem 39: 1244-1262. Link: https://goo.gl/WvoABr
  4. Kumar KU, Henock, Tsegay (2015) Conversion of solid waste into bio fertilizer by vermicomposting a case study of padmanadapuram. International Journal of Innovative Research in Science, Engineering and Technology. 4: 3801-3808. Link: https://goo.gl/fJK07Z
  5. Sequeira V, Chandrashekar JS (2015) Vermicomposting of biodegradable municipal solid waste using indigenous Eudrilus sp. Earthworms. Int J Curr Microbiol App Sci 4: 356-365. Link: https://goo.gl/nzr1am
  6. Aali R, Jafarpour M, Kazemi E, Pessarakli M (2017) Effects of raw materials on vermicompost qualities. Journal of Plant Nutrition. Link: https://goo.gl/lSfzg0
  7. Julka JM (1986) Earthworms resources of India Proc. Nat. Sem. Org. waste utilization, Vermicompt, Part B: verms and Vermicomposting. In: Dash RC, Senapathi BK, Mishra PC, (Eds.) 1-7.
  8. Pathma J, Sakthivel N (2012) Microbial diversity of vermicompost bacteria that exhibit useful agricultural traits and waste management potential. Springer Plus 1: 26. Link: https://goo.gl/pv6t39
  9. Edwards CA, Dominguez J, Neuhauser EF (1998) Growth and reproduction of Perionyxexcavatus (Perr.) (Megascolecidae) as factors in organic waste management. Biology and Fertility of Soils 27: 155-161. Link: https://goo.gl/gJ7OOO
  10. Atiyeh RM, Lee S, Edwards CA, Arancon NQ, Metzger JD (2002) The influence of humic acids derived from earthworm-processed organic wastes on plant growth. Bioresource Technology 84: 7-14. Link: https://goo.gl/x3ixfi
  11. Nagavallemma KP, Wani SP, Lacroix S, Padmaja VV, Vineela C, et al. (2004) Vermicomposting: Recycling wastes into valuable organic fertilizer. Global Theme on Agroecosystems Report no. 8. Patancheru 502 324, Andhra Pradesh, India: International Crops Research Institute for the Semi-Arid Tropics 20: 75-83. Link: https://goo.gl/xvD7sz
  12. Ramesh P, Singh M, Rao AS (2005) Organic farming: it’s relevant to Indian context. Current Science 88: 561-568. Link: https://goo.gl/CjZKP0
  13. Westerman PW, Bicudo JR (2005) Management considerations for organic waste use in agriculture. Bioresource Technology 96: 215-221. Link: https://goo.gl/mZA0ut
  14. Nair J, Sekiozoic V, Anda M (2006) EVect of pre-composting on vermicomposting of kitchen waste. Bioresour Technol 97: 2091–2095. Link: https://goo.gl/OE5Yzf
  15. Champar-Ngam N, Iwai CB, Ta-Oun M (2010) Vermicompost: tool for agro-industrial waste management and sustainable agriculture. International Journal of Environment and Rural Development 1-2: 38-43. Link: https://goo.gl/FmGxeT
  16. Shamini K, Fauziah SH, Emenike CU (2011) Vermicomposing of spent tea: A sustainable approach for solid waste management. Proceeding of the 12th International conference on Environmental Science and Technology, Rhodes, Greece, 8-10 September A-1695-A-1700. Link: https://goo.gl/74glhZ
  17. Khalid A, Arshad M, Anjum M, Mahmood T, Dawson L (2011) The anaerobic digestion of solid organic waste. Waste Management 31: 1737-1744. Link: https://goo.gl/78rmje
  18. Lim SL, Wu TY, Lim PN, Shak LPY (2014) The use of vermicompost in organic farming: overview, effects on soil and economics. J Sci Food Agric95: 1143-1156. Link: https://goo.gl/E2tdDb
  19. Adhikary S (2012) Vermicompost, the story of organic gold: A review. Agricultural Sciences 3: 905-917. Link: https://goo.gl/pZ9fxa
  20. Dhimal M, Gautam I, Tuladhar R (2013) Effectiveness of vermicomposting in management of organic wastes using Eisenia foetida and Perionyx favatus in central Zoo Jawalakhel, Nepal. J Nat Hist Mus 27: 92-106. Link: https://goo.gl/G3X7PR
  21. Mehta N, Karnwal A (2013) Solid waste management with the help of vermicomposting and its applications in crop improvement. Journal of Biology and Earth Sciences 3: B8-B16. Link: https://goo.gl/dXQIxr
  22. Kumari S (2013) Solid waste management by vermicomposting. International Journal of Scientific & Engineering Research 4: 1-5. Link: https://goo.gl/pwSr2X
  23. Nasiru A, Ismail N, Ibrahim MH. (2013) Vermicomposting: Tool for sustainable ruminant manure management. Journal of Waste Management 2013:  7. Link: https://goo.gl/bo2GKL
  24. Kaouachi A, Ibijbijen J, Amane M, Jaafari SE (2013) Management of olive mill waste employing vermicomposting technology. International Journal of Science and Research 4: 486-490. Link: https://goo.gl/Me6Ovs
  25. Pirsaheb M, Khosravi T, Sharafi K. (2013) Domestic scale vermicomposting for solid waste management. International Journal of Recycling of Organic Waste in Agriculture 2: 4. Link: https://goo.gl/JFOIZk
  26. Sumi MG, Vani M, Idicula DV, Mini KD (2014) Solid waste management using vermicomposting and kodmic? bio-pedestal column and its utility as organic manure. Asian Journal of Microbiology, Biotechnology & Environmental Sciences 16: 333-338. Link: https://goo.gl/A0NulQ
  27. Sadasivuni S, Bhat R, Pallem C (2015) Recycling potential of organic wastes of arecanut and cocoa in India: a short review. Environmental Technology4: 91-102. Link: https://goo.gl/CMjcLm
  28. Hasheminajs K, Kalbasi M, Golchin A, Shariatmadari H (2006) Comparison of vermicompost and composts as potting media for growth of tomatoes. Journal of Plant Nutrition27: 1107-1123. Link: https://goo.gl/llEnPq
  29. Lokeshwari M, Swamy CN (2008) Vermicomposting of municipal and agricultural solid waste with sewage sludge. Journal of Environmental Research and Development 3:  51-61. Link: https://goo.gl/0TnU4b
  30. Suthar S (2009) Bioremediation of agricultural waste through vermicomposting. Bioremediation Journal 13: 21-28.  Link: https://goo.gl/2knSBg
  31. Gurav MV, Pathade GR (2011) Production of vermicompost from temple waste (Nirmalya): a case study. Universal Journal of Environmental Research and Technology 1: 182-192. Link: https://goo.gl/skuFBu
  32. Beohar PA, Srivastava RK (2011) Poultry waste management through vermicomposting employing exotic and indigenous species of earthworms. Journal of Soil Science 1:  4-11. Link: https://goo.gl/R8kBhf
  33. Lim PN, Wu TY, Sim EYS, Lim SL (2011) The potential reuse of soybean husk as feedstock of Eudrilus eugeniae in vermicomposting. Journal of the Science of Food and Agriculture 91:  2637-2642. Link: https://goo.gl/24YpoG
  34. Dhimal M, Gautam I, Tuladhar R (2013) Effectiveness of vermicomposting in management of organic wastes using Eisenia foetida and Perionyx favatus in central Zoo Jawalakhel, Nepal. J Nat Hist Mus 27:  92-106. Link: https://goo.gl/oO7Ltp
  35. Kaouachi A, Ibijbijen J, Amane M, Jaafari SE (2013) Management of olive mill waste employing vermicomposting technology. International Journal of Science and Research 4:  486-490. Link: https://goo.gl/TzCNuw
  36. Londhe PB, Bhosale SM (2015) Recycling of solid wastes into organic fertilizers using low cost treatment: vermicomposting. International Journal of Innovations In Engineering Research and Technology 2: 1-11. Link: https://goo.gl/0FouGw
  37. Nag AK, Singh B, Singh KK (2015) A pilot scale solid waste management programme through vermicomposting of organic waste worship materials from some religious places of Patna Bihar. Indian Journal of Applied Research 5:  297-301. Link: https://goo.gl/CiERlW
  38. Albasha MO, Gupta P, Ramteke PW (2015) Management of kitchen waste by vermicomposting using earthworm, Eudrilus eugeniae. International Conference on Advances in Agricultural, Biological & Environmental Sciences(AABES-2015)J22-23. Link: https://goo.gl/QHcTI5
  39. Jain N (2016) Waste management of temple floral offerings by vermicomposting and its effect on soil and plant growth. International Journal of Environmental & Agriculture Research 2: 89-94. Link: https://goo.gl/loRasI
  40. Peyvast GH, Olfati JA, Madeni S, Forghani A, Samizadeh H (2008) Vermicompost as a soil supplement to improve growth and yield of parsley. International Journal of Vegetable Science 2: 19-27. Link: https://goo.gl/2gDG9K
  41. Kizilkaya R, Turkay FSH, Turkmen C, Durmus M (2012) Vermicompost effects on wheat yield and nutrient contents in soil and plant. Archives of Agronomy and Soil Science 58: S175-S179. Link: https://goo.gl/95MnYP
  42. Ansari A, Hanief A (2015) Microbial degradation of organic waste through vermicomposting. International Journal of Sustainable Agricultural Research 2: 45-54. Link: https://goo.gl/uedSi4
  43. Karmakar S, Adhikary M, Gangopadhyay A, Brahmachari K (2015) Impact of vermicomposting in agricultural waste management vis-à-vis soil health care. J Environ Sci Natural Resources 8: 99-104. Link: https://goo.gl/akoWXX
  44. Bharti N, Barnawal D, Shukla S, Tewari SK, Katiyar RS (2016) Integrated application of Exiguobacterium oxidotolerans, Glomus fasciculatum, and vermicompost improves growth, yield and quality of Mentha arvensis in salt-stressed soils. Industrial Crops and Products 83: 717-728. Link: https://goo.gl/A6Otth
  45. Xu L, Yan D, Ren X, Wei Y, Zhou J, et al. (2016) Vermicompost improves the physiological and biochemical responses of blessed thistle (Silybum marianum Gaertn.) and peppermint (Mentha haplocalyx Briq) to salinity stress. Industrial Crops and Products 94: 574-585. Link: https://goo.gl/w7SsyX
  46. Zamani J, Afyuni M, Sepehrnia N, Schulin R (2016) Opposite effects of two organic waste on the physical quality of an agricultural soil. Archives of Agronomy and Soil Science 62: 413-427. Link: https://goo.gl/eadfXG
  47. Masullo A (2017) Organic wastes management in a circular economy approach: rebuilding the link between urban and rural areas. Ecological Engineering 101: 84-90. Link: https://goo.gl/p1OrYc
  48. Malińska K, Golanska M, Caceres R, Rorat A, Weisser P, et al. (2017) Biochar amendment for integrated composting and vermicomposting of sewage sludge – The effect of biochar on the activity of Eisenia fetida and the obtained vermicompost. Bioresource Technology 225: 206-214. Link: https://goo.gl/e7Nx91
  49. Maji D, Misra P, Singh S, Kalra A (2017) Humic acid rich vermicompost promotes plant growth by improving microbial community structure of soil as well as root nodulation and mycorrhizal colonization in the roots of Pisum sativum. Applied Soil Ecology 110: 97-108. Link: https://goo.gl/WHGpNr
  50. Bhat SA, Singh J, Vig AP (2017) Earthworms as organic waste managers and biofertilizer producers. Waste and Biomass Valorization 1-15. Link: https://goo.gl/JSZG0y
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