摘要
研究不同温度、水力停留时间(HRT)、曝气方式条件下,以砾石作填料的生物反应器处理生活污水的效果,并通过生物学手段分析其机理。结果表明,20℃、HRT为10h、连续曝气时,处理效果最佳,其中,化学需氧量(COD)去除率为85%,氨氮为65%,固体悬浮物(SS)为91.2%,浊度为97%,且无剩余污泥排出。反应系统中生物膜微生态环境复杂,微生物多样性较高,其中以轮虫、钟虫为主的原生动物及以假单胞菌属和拟杆菌/噬纤维菌菌属为主的原核生物在降解污水中有机物的同时,使系统污泥减量。
This paper introduces a new technology named gravel contact oxidation reactor to the sewage treatment, whose purpose is to test the sewage treatment efficiency under different conditions by changing water temperature, HRT, and the aerating form. The paper also intends to disclose the mechanism of the excessive sludge reduction through biological analysis of the community structure of the microbes and the dominant microbe functions. The experimental results indicate that under the conditions of 20℃, HRT =10 h, continuous aeration, the sewage treating process can be expected to go in a desirable manner. That is to say, in such desirable manner, the removal efficiency for treating COD, NH3-N, SS, its turbidity can be expected to reach 85%, 65%, 91.2%, 97% with no excessive sludge discharged. Furthermore, the analysis has also found a great number of different kinds of microbes in the reactor. Protozoa, including rotifer and vorticella, which help to promote the excessive sludge decrement by lengthening the food chain, predate thebacteria directly, and enhance the bacteria activity. The dominant members are Pseudomonas microbes mainly by respiratory metabolization, and Bacterodietes/Cytophaga microbes mainly by fermentative metabolization. Such microbes are also found favorable for the excessive sludge decrement.
出处
《科技导报》
CAS
CSCD
北大核心
2009年第13期92-95,共4页
Science & Technology Review
关键词
环境工程
砾石
污水处理
生物接触氧化
environmental engineering
gravel
sewage treatment
biological contact oxidation
