摘要
针对目前以CASS工艺为代表的污水处理厂受限于占地面积,难以实现就地提标改造的问题,西部某县城污水处理厂采用BioDopp工艺对其进行了升级改造,将已建CASS池增加内部隔墙,进行功能区划分,利用空气提推,实现硝化液的回流及池内循环,在不单独设置泥水分离区的情况下实现了固液分离,同时实现了厌氧区、缺氧区、曝气区、泥水分离区各处理单元的有机结合。实践表明,在设计进水条件下,改造后的生化池出水CODCr、NH3-N、TN的平均质量浓度分别为33.30、1.26、9.75mg/L,同时出水TP及SS也达到了GB18918—2002《城镇污水处理厂污染物排放标准》中的一级A标准。
In view of the problem that sewage treatment plant represented by CASS process is limited by floor space and is hard to realize on-site upgrading and reconstruction, a sewage treatment plant in a county town in western China adopted BioDopp craft to upgrade and reconstruct the original process, through adding internal partitions, dividing functional districts, utilizing air lifting and pushing, nitrifying liquid reflux and tank internal recycle were achieved. Moreover, solid-liquid separation was realized through a special treatment structure design without an individual mud-water separation zone;besides, organic combination of each processing units of anaerobic zone, anoxic zone, aeration zone and mud-water separation zone was also realized. The practical results showed that, under the design influent water condition, the average mass concentrations of CODCr, NH3-N and TN in the effluent water from the reconstructed biological tank were 33.30, 1.26 and 9.75 mg/L respectively, moreover, the effluent TP and SS concentrations also met the requirement of grade 1 level A of GB 18918-2002 Discharge Standard of Pollutants for municipal Wastewater Treatment.
作者
卢殷达
彭秀菊
何勇
张雷
陶晶
赵嫱
LU Yin-da;PENG Xiu-ju;HE Yong;ZHANG Lei;TAO Jing;ZHAO Qiang(Southwest Municipal Engineering Design and Research Institute of China, Chengdu 610081, China;Longchang Waterworks Company, Longchang 642150, China;Beijing BHT Environment Technology Co., Ltd., Beijing 100102, China)
出处
《工业用水与废水》
CAS
2019年第3期61-64,共4页
Industrial Water & Wastewater
