Department of Civil Engineering, Guru Nanak Dev Engineering College, Ludhiana 141006, India.
Department of Civil Engineering, Guru Nanak Dev Engineering College, Ludhiana 141006, India.
Bioresour Technol. 2020 Dec;318:124097. doi: 10.1016/j.biortech.2020.124097. Epub 2020 Sep 9.
Vermicomposting of paper mill sludge (PMS) and tea waste (TW) using cow dung (CD) in five different combinations was carried out using Eisenia fetida. The aim of this study was to manage the waste disposal problem of PMS using the environment-friendly technology of vermiconversion. The changes in physico-chemical parameters were observed at 30-day intervals up to 90 days. The final pH was within 6.09-6.95 among all units. The TN, TP and TK contents increased 0.30-0.87, 0.53-3.23, 0.33-0.63 times, respectively in all mixtures after vermicomposting with increase in EC and ash Content. Maximum reduction in Total Organic Carbon (23.91%) was observed in treatment with highest PMS content, attributed to earthworm activity. Reduction in C: N ratio (38.63%-54.05%) was significantly observed in all the treatments. It was finally inferred that the paper mill sludge and tea waste in combination with cow dung can be successfully biotransformed into useful manure employing earthworms.
采用赤子爱胜蚓对造纸厂污泥（PMS）和茶渣（TW）与牛粪（CD）的 5 种不同组合进行了堆肥处理，旨在利用蚯蚓转化的环保技术来解决 PMS 的废物处理问题。在 90 天的时间内，每隔 30 天观察一次理化参数的变化。所有单元的最终 pH 值均在 6.09-6.95 之间。堆肥后，所有混合物中的 TN、TP 和 TK 含量分别增加了 0.30-0.87、0.53-3.23 和 0.33-0.63 倍，同时 EC 和灰分含量也有所增加。在 PMS 含量最高的处理中，总有机碳（TOC）的最大减少量为 23.91%，这归因于蚯蚓的活动。所有处理中 C:N 比（38.63%-54.05%）均显著降低。最后推断，造纸厂污泥和茶渣与牛粪结合可以成功地利用蚯蚓将其生物转化为有用的肥料。
