引用本文:刘绍根,梅子鲲,谢文明,等.处理城市污水的好氧颗粒污泥培养及形成过程[J].环境科学研究,2010,23(7):918-923.
LIU Shao-gen,MEI Zi-kun,XIE Wen-ming,et al.Cultivation and Granulation Process of Aerobic Granular Sludge Applied to Treat Municipal Wastewater[J].Reserrch of Environmental Science,2010,23(7):918-923.]
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处理城市污水的好氧颗粒污泥培养及形成过程
刘绍根1,2, 梅子鲲1, 谢文明2, 倪丙杰2, 李文卫2, 俞汉青2
1.安徽建筑工业学院环境与能源工程学院, 安徽 合肥 230022;2.中国科学技术大学化学与材料科学学院, 安徽 合肥 230026
摘要:
在中试序列间歇式活性污泥法(SBR)反应器中采用有机物浓度低的城市污水培养好氧颗粒污泥. 运行过程中考察了污泥性能,并通过调整、优化沉淀时间和排水比等运行参数,培养出了高性能且稳定的好氧颗粒污泥. 活性污泥接种40 d后反应器内开始出现细小颗粒,160 d后颗粒污泥趋于成熟,粒径可达0.8 mm,且其周围有大量的原生动物. 颗粒化过程中,污泥密度、沉降速率和ρ(MLSS)分别从初期的1.004 0 g/cm3,6.8 m/h和4 000 mg/L升至1.010 5 g/cm3,38.5 m/h和8 000 mg/L,污泥容积指数(SVI30)则从75 mL/g降至40 mL/g. 形成后的颗粒污泥对城市污水中CODCr和NH4+-N有很好的去除效果,出水中ρ(CODCr)和ρ(NH4+-N)分别在50和5 mg/L以下.
关键词:  城市污水  颗粒化  中试  好氧颗粒污泥
DOI:
分类号:
基金项目:国家水体污染与治理科技重大专项(2008ZX07010-005);安徽省“十一五”重点科技计划项目
Cultivation and Granulation Process of Aerobic Granular Sludge Applied to Treat Municipal Wastewater
LIU Shao-gen1,2, MEI Zi-kun1, XIE Wen-ming2, NI Bing-jie2, LI Wen-wei2, YU Han-qing2
1.School of Environmental and Energy Engineering, Anhui University of Architecture, Hefei 230022, China;2.School of Chemistry and Material Science, University of Science & Technology of China, Hefei 230026, China
Abstract:
In this study, low-strength municipal wastewater was used to cultivate aerobic granular sludge in a pilot-scale sequencing batch reactor (SBR). During the granulation process, the characteristics of the sludge were investigated, and the operation parameters such as settling time and volume exchange ratio were adjusted and optimized according to the characteristics of sludge in the reactor to cultivate high-powered and stable aerobic granular sludge. The granules with small size were observed in the reactor after 40 days’ cultivation. After 160 days’ cultivation, the granules became mature. Their maximum size reached 0.8 mm, and a mass of protozoa appeared around the granules. In the course of granulation, the specific gravity, settling velocity, and mixed liquor suspended solids (MLSS) mass concentration increased from 1.004 0 g/cm3, 6.8 m/h and 4 000 mg/L at the initial stage to 1.010 5 g/cm3, 38.5 m/h and 8 000 mg/L, respectively, while the sludge volumetric index (SVI30) decreased from 75 mL/g to 40 mL/g. The concentrations of CODCr and NH4+-N in the effluent from the granular reactor were below 50 and 5 mg/L, respectively, indicating high removal efficiencies of CODCr and NH4+-N by the aerobic granular sludge.
Key words:  municipal wastewater  granulation  pilot-scale  aerobic granular sludge