污水处理厂提标扩量协同增效的实践应用

Enhancement in Raising Standards&Expanding Capacity of Sewage Treatment Plants

针对采用“前置缺氧-百乐克(BIOLAK)-曝气生物滤池(BAF)-活性砂滤池”工艺的城镇污水厂,通过工程技改、设施大修与运行优化等组合措施,实现一级A向准Ⅳ类提标与扩量双增效目标,并有效应对CSO环境风险。通过载体吸附、曝气充氧系统强化、化学辅助除磷等两级协同工程强化手段与技术验证储备,以强化污染物的高标极限去除,实现长效达标。基于达标稳定性、运行经济性的双原则,污染物消减与节能降耗成效显著。开展生化需氧曝气、内外碳源调配优化、内外回流调控、生化高效絮凝助沉强化等精细化运行,并预留应对未来尾水水质进一步趋严需求。

For urban sewage plants using the process of pre-anoxic-BIOLAK-biological aerated filter(BAF)-active sand filter,through the combination of engineering technical reform,facility overhaul&operation optimization,the double efficiency goal of upgrading from Grade A to Quasi Class Ⅳ and expanding capacity is achieved,and the environmental risks of CSO are effectively addressed.The high-standard limit removal of pollutants is strengthened and longterm standards are achieved by means of two levels of collaborative engineering strengthening means&technical verification reserve,such as carrier adsorption,aeration oxygenation system strengthening&chemical assisted phosphorus removal.Based on the double principles of standard stability&operation economy,the results of pollutant reduction&energy saving are remarkable.Carry out biochemical aerobic aeration,internal and external carbon source allocation optimization,internal&external reflux regulation,biochemical efficient flocculation-assisted sedimentation strengthening and other fine operations,and reserve for future tail water quality further stringent requirements.