Department of Molecular Biology & Biotechnology, Tezpur University, Napaam, Assam, India.
Department of Molecular Biology & Biotechnology, Tezpur University, Napaam, Assam, India.
Bioresour Technol. 2018 Oct;266:472-481. doi: 10.1016/j.biortech.2018.07.001. Epub 2018 Jul 4.
Chromium-rich tannery sludge (TS) is a hazardous industrial waste. Although vermicomposting can be an effective remediation pathway; but, the unique waste degrading efficiency of Eudrillus eugeniae is least explored. The present work showcases an efficient earthworm-mediated protocol for TS sanitization deploying E. eugeniae. Changes in pH, TOC (%), nutrients (NPK), metals (Cr, Cd etc.) and microbial diversity were monitored in various E. eugeniae mediated TS based vermibed. Total N, P, and K availability increased by 2-5 folds upon vermicomposting with 3-4 folds reduction in C/N ratio. Moreover, substantial removal of Cr (89%), Cd (88%), and Zn (79%) was recorded in the substrate. Bioaccumulation of these metals in the gut significantly reduced the pollution load in the finished products. The corresponding augmentation of microbial density and low respiratory CO release from the vermibeds substantiated the environmental proficiency of vermitechnology.
富含铬的制革污泥（TS）是一种危险的工业废物。尽管蚯蚓堆肥是一种有效的修复途径，但尤氏蜣螂对废物的独特降解效率仍未得到充分探索。本工作展示了一种利用尤氏蜣螂对 TS 进行消毒的高效蚯蚓介导方案。在各种基于尤氏蜣螂的 TS 蚯蚓床中，监测了 pH 值、TOC（%）、养分（NPK）、金属（Cr、Cd 等）和微生物多样性的变化。蚯蚓堆肥后总氮、磷和钾的有效性增加了 2-5 倍，而 C/N 比减少了 3-4 倍。此外，基质中 Cr（89%）、Cd（88%）和 Zn（79%）的去除量相当可观。这些金属在肠道中的生物累积显著降低了最终产品的污染负荷。蚓床中微生物密度的增加和呼吸 CO 释放量的降低证实了生物修复技术的环境效率。
