Environmental Engineering Laboratory, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
Bioresour Technol. 2010 Jul;101(14):5419-25. doi: 10.1016/j.biortech.2010.02.029. Epub 2010 Feb 26.
This work illustrates the potential of domestic biogas digester slurry in vermicompost production. To achieve the objectives biogas plant slurry (BGS) was mixed with crop residues (CR) in different ratios to produce seven different feed mixtures for earthworm Eisenia fetida. After 15weeks vermicomposted material was analyzed for different chemical parameters. In all waste mixtures, a decrease in pH, organic C and C:N ratio, but increase total N, available P and exchangeable K was recorded. C:N ratio of end material (vermicompost) was within the agronomic acceptable limit (<20). The reproduction biology of E. fetida in different waste mixture was also monitored and they showed excellent biomass gain as well as cocoon production in all waste mixtures. The results clearly suggested that vermitechnology could be a potential technology to convert byproducts of domestic biogas plant slurry into some value-added products.
这项工作说明了国内沼气消化器泥浆在蚯蚓堆肥生产中的潜力。为了实现目标，沼气厂泥浆（BGS）与农作物残余物（CR）以不同比例混合，为蚯蚓赤子爱胜蚓（Eisenia fetida）生产了七种不同的饲料混合物。15 周后，对蚯蚓堆肥材料进行了不同化学参数的分析。在所有废物混合物中，记录到 pH 值、有机 C 和 C:N 比降低，但总 N、有效 P 和可交换 K 增加。最终材料（蚯蚓堆肥）的 C:N 比在农业可接受的范围内（<20）。在不同废物混合物中赤子爱胜蚓的繁殖生物学也得到了监测，它们在所有废物混合物中都表现出了极好的生物量增长和茧产量。结果清楚地表明，蚯蚓技术可能是一种将国内沼气厂泥浆的副产品转化为一些增值产品的潜在技术。
