Biotransformation of sludges from dairy and sugarcane industries through vermicomposting using the epigeic earthworm Eisenia fetida

IF 1.2 Q4 ENVIRONMENTAL SCIENCES
Dayanand Sharma, Rajnikant Prasad, B. Patel, C. K. Parashar
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引用次数: 2

Abstract

Purpose In India, the global contribution of milk and sugarcane production are 21% and 12 to 15%. Dairy and sugarcane industries produce end products as sludge which is directly dumped in open land which pollute the land and groundwater of the nearby areas. The present study was aimed to utilize the vermicomposting technique to treat the sludge generated from these two industries. Method The dairy sludge, sugarcane press mud were homogenously mixed with cattle manure to form five different proportions of waste mixture M1, M2, M3, M4, and M5. The waste mixtures were kept in reactors for 15 days for pre-composting. Once the pre-composting temperature reached to 25 °C, fifty adults Eisenia fetida earthworms with an average weight of 0.4 to 0.5 gram each was introduced into each reactor. Results The highest production of earthworm cocoons was studied in the combinations of M4 and M5. The higher growth of earthworm was observed in M5 (39%) followed by M3 (34%). The germination index and carbon to nitrogen ratio were found to be 100 to 121% and 9 to 11, respectively, along with the negligible carbon dioxide evolution in every combination that revealed the maturity and stability of vermicomposting. Conclusion The vermicompost obtained from the combination of dairy (milk processing unit) and sugarcane industries press mud sludge was rich in nutrients and suitable to utilize as nutrients (fertilizer) for the crops. Vermicomposting can solve the issue of sludge management from these two industries with the utilization of end products as vermicompost.
利用附生蚯蚓进行蚯蚓堆肥对乳制品和甘蔗工业污泥的生物转化
在印度,牛奶和甘蔗产量分别占全球产量的21%和12 - 15%。乳制品和甘蔗工业生产的最终产品是污泥,这些污泥直接倾倒在开阔的土地上,污染了附近地区的土地和地下水。本研究旨在利用蚯蚓堆肥技术处理这两个行业产生的污泥。方法将乳业污泥、甘蔗压榨泥与牛粪均匀混合,形成5种不同比例的废液M1、M2、M3、M4、M5。废物混合物在反应器中保存15天进行预堆肥。当预堆肥温度达到25℃时,在每个反应器中加入50只平均重量为0.4 ~ 0.5克的肥Eisenia fetida成虫。结果M4和M5组合产茧率最高。蚯蚓生长最快的是M5(39%),其次是M3(34%)。土壤萌发指数和碳氮比分别为100 ~ 121%和9 ~ 11,且各组合的二氧化碳含量变化均可忽略不计,表明蚯蚓堆肥的成熟和稳定。结论乳业(奶加工单位)与甘蔗工业压榨污泥联合生产的蚯蚓堆肥具有丰富的营养成分,适合作为作物养分(肥料)利用。蚯蚓堆肥可以解决这两个行业的污泥管理问题,利用最终产品作为蚯蚓堆肥。
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来源期刊
CiteScore
2.10
自引率
26.70%
发文量
0
审稿时长
13 weeks
期刊介绍: The International Journal of Recycling of Organic Waste in Agriculture is an open access journal that publishes high-quality solicited and unsolicited articles, in all areas of Recycling of organic waste including: -Solid waste reuse in agriculture -Waste water reuse in agriculture -Utilization of organic wastes: composting -Ways to reduce, reuse and recycle organic waste -Social and economic impact of reduction, reuse and recycling of organic waste in agriculture -Methods to raise the public awareness of recycling and reuse of organic waste in agriculture -Organic waste utilization in animal and poultry nutrition -Urban food waste composting
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