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Effects of biochar on nitrogen transformation and heavy metals in sludge composting

文献类型: 外文期刊

作者: Liu, Wei 1 ; Huo, Rong 1 ; Xu, Junxiang 2 ; Liang, Shuxuan 1 ; Li, Jijin 2 ; Zhao, Tongke 2 ; Wang, Shutao 3 ;

作者机构: 1.Hebei Univ, Coll Chem & Environm Sci, Baoding 071002, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China

3.Agr Univ Hebei, Baoding 071002, Peoples R China

关键词: Biochar;Nitrogen;Heavy metal;Composting

期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Composting is regarded as an effective treatment to suppress pathogenic organisms and stabilize the organic material in sewage sludge. This study investigated the use of biochar as an amendment to improve the composting effectiveness and reduce the bioavailability of heavy metals and loss of nitrogen during composting. Biochar of 0%, 1%, 3%, 5% and 7% were added into a mixture of sludge and straw, respectively. The use of biochar, even in small amounts, altered the composting process and the properties of the end products. Biochar addition resulted in a higher pile temperature (66 degrees C) and could reduce nitrogen loss by transforming ammonium into nitrite. In the 5% biochar group, the final product from sludge composting, ammonia nitrogen, decreased by 22.4% compared to the control, and nitrate nitrogen increased by 310.6%. Considering temperature and N transformation, the treatment with 5% biochar is suggested for sludge composting. (C) 2017 Elsevier Ltd. All rights reserved.

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