| Literature DB >> 24315937 |
Hai-Bin Zhou1, Chuang Ma2, Ding Gao3, Tong-Bin Chen1, Guo-Di Zheng1, Jun Chen1, Tian-Hao Pan1.
Abstract
A recyclable plastic bulking agent (RPBA) that can be screened and reused was developed to improve sludge composting and to reduce costs. Two RPBAs were developed: RPBA35 (35 mm in diameter) and RPBA50 (50mm in diameter). The objective was to study the influence of size and quantity of RPBA on temperature, oxygen content, water removal during sludge composting, and phytotoxicity of the compost. RPBAs of both sizes improved the temperature, oxygen supply, and water removal compared with the treatment with no RPBA, and obtained phytotoxic-free compost. RPBA50 more effectively removed water than RPBA35. Oxygen diffusion rate in the composting pile containing RPBA50 was higher than in the treatment with no RPBA. When the RPBA50: sludge mixture ratio was above 1:1.5, the period over which the temperature exceeded 55 °C was insufficient to meet the harmless treatment requirement. The water evaporation rate was highest at a ratio of 1:2.Entities:
Keywords: Composting; Oxygen content change; Recyclable plastic bulking agent; Sewage sludge; Water removal
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Year: 2013 PMID： 24315937 DOI： 10.1016/j.biortech.2013.10.061
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642