应用可回收塑料膨胀剂进行污水污泥堆肥。
Application of a recyclable plastic bulking agent for sewage sludge composting.
机构信息
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Beijing 100101, PR China.
Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Beijing 100101, PR China; Zhengzhou University of Light Industry/Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan Province, Zhengzhou 450001, PR China.
出版信息
Bioresour Technol. 2014;152:329-36. doi: 10.1016/j.biortech.2013.10.061. Epub 2013 Oct 24.
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.
为改善污泥堆肥并降低成本，开发了一种可筛选和再利用的可回收塑料增容剂（RPBA）。开发了两种 RPBA：直径为 35mm 的 RPBA35 和直径为 50mm 的 RPBA50。目的是研究 RPBA 的大小和用量对污泥堆肥过程中温度、含氧量、水分去除以及堆肥植物毒性的影响。与不添加 RPBA 的处理相比，两种尺寸的 RPBA 均提高了温度、供氧和水分去除效果，获得了无植物毒性的堆肥。与 RPBA35 相比，RPBA50 更有效地去除了水分。添加 RPBA50 的堆肥中氧气扩散速率高于不添加 RPBA 的处理。当 RPBA50：污泥混合物的比例高于 1：1.5 时，温度超过 55°C 的时间不足以满足无害处理要求。当比例为 1：2 时，水分蒸发率最高。
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