摘要
针对污泥好氧堆肥过程中有关温室气体及氨气释放的基础数据大量缺乏的问题,将污泥和木屑混合进行为期60天的好氧堆肥试验,考察污泥堆肥过程中二氧化碳、甲烷、氧化亚氮和氨气的释放规律。研究结果表明:温室气体的释放均主要集中在堆肥的升温期。堆体中的较高的溶解性有机碳的质量比会促进二氧化碳的产生,较差的氧传质情况和较高的温度有利于甲烷的产生,物料中亚硝态氮的质量比与氧化亚氮释放速率呈正相关。堆肥过程中氨气的释放主要集中在堆肥高温期,这归因于高温期的高氨氮高pH值环境会促进污泥中的铵态氮以氨气形式逸出发酵体系。
In view of the lack of basic data on the release of greenhouse gases and ammonia during the aerobic composting of sew-age sludge, the emission regulations of carbon dioxide, methane, nitrous oxide and ammonia were studied during 60 days aerobic composting of sewage sludge mixed with wood chips. The results show that the emission of three greenhouse gases mainly oc- currs during mesophilic stage. The high mass fraction of dissolved organic carbon promotes the production of carbon dioxide. The poor oxygen transfer efficiency and high temperature facilitate the emission of methane. Mass fraction of nitrite in material was positively related to the emission rate of nitrous oxide. Ammonia emission was concentrated in the thermophilic phase of compos-ting, because high temperature,high ammonium concentration and high pH value promoted ammonium emission from composting matrix in the form of ammonia
作者
武一奇
王科
刘惠敏
吴传栋
毛海龙
柴春荣
李伟光
WU Yiqi WANG Ke LIU Huimin WU Chuandong MAO Hailong CHAI Chunrong LI Weiguang(School of Municipal and Environmental Engineering,Harbin Institute of Technology y Harbin 150090, China)
出处
《中国科技论文》
北大核心
2017年第3期307-311,共5页
China Sciencepaper
基金
国家自然科学基金资助项目(51408151)
高等学校博士学科点专项科研基金资助项目(20132302120075)
国家水体污染控制与治理科技重大专项(2013ZX07201007)
中央高校基本科研业务费专项资金资助(HIT.NSRIF.2017057)
关键词
市政工程
污泥
堆肥
氨气
温室气体
municipal engineering
sewage sludge
compost
ammonia
greenhouse gase
