摘要：

把物化/生化协同除磷技术用于氧化沟功能提升,达到不对原工艺做大的改造的情况下提高磷的去除率。实验结果表明:氧化沟好氧区投加液体聚磷硫酸铁(PPFS)后,对COD、NH₄⁺-N 和TN的去除效果略有提升,TP去除率从70%提高到92%,出水TP低于0.5 mg/L,去除效果稳定,最佳投加量为0.05 mL/L(75 mg/L)。能够实现投加少量化学絮凝剂达到出水目标,且对生化污泥没有明显的消极影响。

关键词: 物化/生化协同除磷技术, 氧化沟, 聚磷硫酸铁, 化学絮凝剂, 生化污泥

Abstract:

The physicochemical/biochemical synergistic phosphorus removal technology has been used for improvingoxidation ditch function. The goal of improving the phosphorus removing rate without sever transformation on theoriginal process is attained. The results show that after liquid PPFS is added to the oxidation ditch aerobic zone,theremoving efficacy of COD,NH₄⁺-N and TN can slightly be increased. Its TP removal rate has increased from 70% to92%,and effluent TP concentration is below 0.5 mg/L;The removing effect is stable;The optimum dosage is 0.05mL/L ( 75 mg/L ).Therefore,the goal of obtaining effluent water with a small amount of chemical coagulant can thusbe realized. Therefore,achieving the desired effluent requirements with a small amount of coagulant,but withoutapparent negative effect on biochemical sludge can thus be realized.

Key words: physicochemical/biochemical synergistic phosphorus removal technology, oxidation ditch, PPFS, chem-ical coagulant, biochemical sludge

中图分类号: 

• X703.1