Abstract:

An integrated oxic-anoxic-anaerobic-oxic(OAAO)-ceramic membrane MBR process with a treatment capacity of 20 000 m³/d was built to solve the problem of long-term full-load and even overload operation of a municipal wastewater treatment plant in Dinghu, Guangdong Province, China. With microbial environment precisely control, high-efficiency treatment with micro-oxygenated organisms was realized. The project operated stably after completion, with COD and NH₄ ⁺-N in effluent reaching the Ⅳ class water standard in the Environmental Quality Standard for Surface Water(GB 3838-2002), while TN and TP could also meet the Class A standard in the Pollutant Discharge Standard for Urban Wastewater Treatment Plants(GB 18918-2002) stably. This project involved a total investment of 40.61 million yuan, covered an area of 4 713.4 m², and the unit treatment cost was 0.42 yuan/t. Compared with the AAO-denitrification filter process with the same treatment capacity in this wastewater treatment plant, integrated OAAO-ceramic membrane MBR process saved 43.8% of the total investment, reduced 66% of area and 19.23% of unit treatment cost, also decreased the waste sludge production to 1.5 t/d.

Key words: biological treatment, ceramic membrane, integrated process, municipal wastewater plant, precise regulation

摘要：

为解决广东省鼎湖市某市政污水处理厂长期满负荷甚至超负荷运行的困境，通过新建一套处理规模为20 000 m³/d的新型兼氧-微氧-微氧-好氧（OAAO）-陶瓷膜MBR一体化装置，对原污水处理厂进行扩容升级。通过精准控制新建各处理单元的微生物反应环境，实现微氧生物对有机污染物的高效处理。工程建成后稳定运行，出水COD和NH₄ ⁺-N均稳定达到《地表水环境质量标准》（GB 3838—2002）的Ⅳ类水标准，TN和TP亦可稳定达到《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A标准。项目总投资4 061万元，占地面积4 713.4 m²，运行成本0.42元/t，对比该污水处理厂同等处理规模的原有AAO-反硝化滤池工艺，新建OAAO-陶瓷膜MBR一体化工艺总投资节省43.8%，占地面积节省66%，单位处理成本降低19.23%，剩余污泥产量减少至1.5 t/d。

关键词: 生物处理, 陶瓷膜, 一体化工艺, 城市污水处理厂, 精准调控

CLC Number: 

• X703.1