Effect of Processing Conditions on Nitrogen Loss of Sewage Sludge Composting

IF 2 4区 农林科学 Q3 ECOLOGY Compost Science & Utilization Pub Date : 2020-10-01 DOI:10.1080/1065657X.2021.1949410
Te Ma
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引用次数: 5

Abstract

Abstract As a by-product of municipal sewage treatment, sewage sludge must be properly treated to avoid secondary pollution to the environment. Aerobic composting is one of the mainstream technologies in sludge treatment, but nitrogen loss in composting process usually reaches more than 40%, which seriously reduces the fertilizer efficiency of composting products, and at the same time, a large amount of odor will cause harm to the environment. In this article, the nitrogen emission and nitrogen loss were reduced by adding sawdust of different proportions in the sludge composting process, and the nitrogen emission and nitrogen loss were reduced by up to 70% and 30% respectively. The addition of sawdust can significantly increase the sludge composting temperature and duration of high temperature period, reduce the sludge pH and water content, increase the mineralization rate of organic matter, thereby inhibiting the nitrogen loss. The results showed that nitrogen loss decreased with the increase of sawdust ratio, and A30 was the best ratio. The process has the advantages of simple operation, low cost and good nitrogen holding effect.
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工艺条件对污泥堆肥氮损失的影响
摘要污泥作为城市污水处理的副产物,必须对其进行合理处理,避免对环境造成二次污染。好氧堆肥是污泥处理的主流技术之一,但堆肥过程中氮的损失量通常达到40%以上,严重降低了堆肥产品的肥效,同时大量的异味会对环境造成危害。本文通过在污泥堆肥过程中添加不同比例的锯末,减少了氮的排放和氮的损失,氮的排放和氮的损失分别减少了70%和30%。木屑的添加可以显著提高污泥的堆肥温度和高温期的持续时间,降低污泥的pH值和含水量,提高有机质的矿化率,从而抑制氮的流失。结果表明,氮损失随木屑比的增加而降低,其中A30为最佳配比。该工艺操作简单,成本低,持氮效果好。
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来源期刊
Compost Science & Utilization
Compost Science & Utilization 农林科学-生态学
CiteScore
4.10
自引率
0.00%
发文量
0
审稿时长
>36 weeks
期刊介绍: 4 issues per year Compost Science & Utilization is currently abstracted/indexed in: CABI Agriculture & Environment Abstracts, CSA Biotechnology and Environmental Engineering Abstracts, EBSCOhost Abstracts, Elsevier Compendex and GEOBASE Abstracts, PubMed, ProQuest Science Abstracts, and Thomson Reuters Biological Abstracts and Science Citation Index
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