环境温度和曝气频率对污水污泥好氧堆肥厂氨和温室气体排放的影响。
Effects of ambient temperature and aeration frequency on emissions of ammonia and greenhouse gases from a sewage sludge aerobic composting plant.
机构信息
Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
出版信息
Bioresour Technol. 2018 Dec;270:457-466. doi: 10.1016/j.biortech.2018.09.048. Epub 2018 Sep 12.
This study analyzed emissions characteristics of NH and greenhouse gases (i.e. NO, CH, and CO) from a municipal sewage sludge aerobic composting plant. Samples were collected during different seasons in which ambient temperatures and aeration frequencies varied. Results revealed (1) the maximum gas emissions occurred during the mesophilic phase for NO (22%-56%) and CH (65%-95%), and in the thermophilic phase for NH (84%-86%) and CO (65%-74%); (2) raising ambient temperatures promoted emissions of NH and greenhouse gases, while improved aeration frequency increased NH but decreased greenhouse gas emissions; (3) CO and NO were found to be the key greenhouse gases emitted during aerobic composting according to assessment of the CO equivalent. The results obtained from this study suggest that adjusting ambient temperature to -3 to 5 °C and aeration frequency in composting workshops can be useful approaches for the reduction of NH and greenhouse gas emissions from municipal sewage sludge composting plants.
本研究分析了城市污泥好氧堆肥厂中 NH 和温室气体（即 NO、CH 和 CO）的排放特征。在不同季节收集了样本，其中环境温度和曝气频率有所不同。结果表明：（1）在中温阶段，NO（22%-56%）和 CH（65%-95%）的最大气体排放，在高温阶段，NH（84%-86%）和 CO（65%-74%）的最大气体排放；（2）提高环境温度会促进 NH 和温室气体的排放，而增加曝气频率会增加 NH 但减少温室气体排放；（3）根据 CO 当量评估，发现 CO 和 NO 是好氧堆肥过程中排放的主要温室气体。本研究结果表明，调节堆肥车间的环境温度至-3 至 5°C 和曝气频率，可有效减少城市污泥堆肥厂中 NH 和温室气体的排放。
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