The design scale of a comprehensive sewage treatment plant in an industrial park in the Pearl River Delta is 1.0X104 m3/d.The influent of the sewage treatment plant is the mixed sewage of industrial pretreatment wastewater and domestic sewage with representative characteris-tics including unstable water quality and quantity,containing complex organic ingredients with low refractory and biodegradability.To treat such influent and satisfy wastewater discharge require-ments,a combination process of hydrolysis-acidification,improved AAO,high-efficiency sedimen-tation,Ozone contact oxidation tank,BAF(Biological Aerated Filter),and Fiber rotary disc filter is adopted in the sewage treatment plant.Early operation results of this process indicate that the effluent stably meets the stricter requirements of both Class A of Discharge Standards pollutants for municipal wastewater treatment plants(GB 18918-2002)and the first level standard of the second time period in Guangdong province's Discharge limits for water pollutants(DB 44/26-2001).Sewage treatment cost is roughly around 1.25 yuan/m3.
关键词
工业园区/综合污水/改良型AAO/曝气生物滤池
Key words
Industrial park/Industrial and domestic combined wastewater/Modified AAO process/Biological aerated filter
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