填料-厌氧-好氧消化+复合酶工艺对城市污水处理及污泥减量的效能  

Performance of Packing-Anaerobic-Aerobic Digestion and Composite Enzyme Processes for Urban Wastewater Treatment and Sludge Reduction

作　　者：贾洪柏 许超[1] 杨云成 刘军 何建强 崔远康 刘回归 何凡 胡立江 饶宾期 JIA Hongbo;XU Chao;YANG Yuncheng;LIU Jun;HE Jianqiang;CUI Yuankang;LIU Huigui;HE Fan;HULijiang;RAO Binqi(Zhejiang Goachieve Environmental Technology Development Co.,Ltd.,Huzhou 313000,China;College of Life Sciences,Northeastern Forestry University,Harbin 150040,China;College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]浙江国千环境技术发展有限公司,浙江湖州313000 [2]东北林业大学生命科学学院,黑龙江哈尔滨150040 [3]中国计量大学机电工程学院,浙江杭州310018

出　　处：《净水技术》2024年第10期99-105,133,共8页Water Purification Technology

基　　金：浙江省万人计划科技创新领军人才,浙江省高层次人才特殊支持计划(2021R52056);浙江省自然科学基金重点项目(LZ23E080001);金华市重大科研计划项目(2022-1-014);湖州市科技攻关计划项目(2022GS06)。

摘　　要：针对当前城市污水处理要求不断提高,以及污水处理工艺产生大量污泥给后续污泥处理处置带来的困难,研究旨在开发一种污泥减量技术,既能降低污泥产率,又能保证污泥沉降性能,同时保障污水处理效果。通过对比运行试验,研究了在恒温条件下好氧-沉淀-厌氧(OSA)工艺和填料-厌氧-好氧消化工艺分别在加入与不加入高效溶胞复合酶处理下的污泥减量效果,以及对污泥上清液有机物和营养盐类的去除效能。结果表明,消化工艺经过6 d后,填料-厌氧-好氧消化+复合酶工艺的污泥降低率可达到44.0%,污泥减量效果最佳。此外,该工艺能使溶解性化学需氧量(SCOD_(Cr))维持在180~200 mg/L,pH值维持在6.8~7.0,氨氮维持在3~4 mg/L,NO_(3)^(-)-N维持在36~43 mg/L,从而保证出水水质。同时污泥容积指数(SVI)无明显变化,确保了污泥沉降性能。In response to the increasing requirements of current municipal wastewater treatment,as well as the large amount of sludge produced by the wastewater treatment process which brings difficulties to the subsequent sludge treatment and disposal.This study aimed to develop a sludge reduction technology that could reduce the sludge yield and ensure the sludge settling performance while safeguarding the effluent treatment effect.The sludge reduction effect of aerobic-sedimentation-anaerobic(OSA)process and filler-anaerobic-aerobic digestion process with and without the addition of highly efficient lytic composite enzyme treatment,as well as the removal efficacy of organic matter and nutrient salts from sludge supernatant were investigated through comparative operation tests under constant temperature.The results showed that the sludge reduction rate of the packing-anaerobic-aerobic digestion and complex enzyme process could reach 44.0%after 6 days of the digestion process,with the best sludge reduction effect.In addition,the process could maintain the dissolved chemical oxygen demand(SCOD_(Cr))from 180 mg/L to 200 mg/L,the pH value was maintained from 6.8 to 7.0,ammonia nitrogen was maintained from 3 mg/L to 4 mg/L,and NO_(3)^(-)-N was maintained from 36 mg/L to 43 mg/L,so to ensure the effluent water quality.Meanwhile,the sludge volumetric index(SVI)value without obvious changes,which ensured the sludge settling performance.

关 键 词：填料-厌氧-好氧消化 厌氧消化 污泥减量 复合酶 城市污水 

分 类 号：X703[环境科学与工程—环境工程]