微波-高锰酸钾耦合调理城市剩余活性污泥  

Excess activated sludge conditioning by microwave combined with potassium permanganate

作　　者：刘昌庚 曾成华 伍斌 杨绍利 LIU Changgeng;ZENG Chenghua;WU Bin;YANG Shaoli(School of Resources and Environmental Engineering,Panzhihua University,Panzhihua Sichuan 617000)

机构地区：[1]攀枝花学院资源与环境工程学院,四川攀枝花617000

出　　处：《环境污染与防治》2018年第2期123-127,150,共6页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.21607088);四川省教育厅科研计划资助项目(No.18ZA0287);攀枝花市科技计划项目(No.2015TX-8);攀枝花学院博士基金资助项目(No.0210600022);干热河谷特色生物资源开发四川省高校重点实验室开放基金资助项目(No.GR-2017-E-04)

摘　　要：采用微波、微波-高锰酸钾耦合工艺对城市剩余活性污泥进行调理。结果表明:(1)微波辐射改善污泥脱水性能的适宜时间为100s,此时污泥比阻(SRF)降至4.49×10^(12) m/kg,较初始值减小63.79%,污泥破解度为2.97%,上清液中胞外聚合物(EPS)为236.11mg/L。(2)微波-高锰酸钾耦合工艺能有效破解污泥,但不利于污泥脱水;污泥破解的适宜高锰酸钾投量为100mg/g(以单位质量总固体计),此时污泥破解度为40.47%,上清液中EPS为542.83mg/L。(3)污泥经微波-高锰酸钾耦合调理后,30d累计产气量为284mL,较未处理污泥和微波辐射调理污泥分别高20.85%和14.06%。Microwave and its combination with potassium permanganate were used to condition excess activated sludge.The experimental results were illustrated as follows:(1)the optimal time of microwave irradiation for enhancing sludge dewaterability was 100 s.At the optimal time,the specific resistance to filtration(SRF)was 4.49×10 12 m/kg with the reduction of 63.79%;sludge disintegration degree and the concentration of extracellular polymeric substances(EPS)in the supernatant were 2.97%and 236.11 mg/L,respectively.(2)Microwave combined with potassium permanganate could disintegrate sludge efficiently but had a negative effect on sludge dewaterability.The optimal dosage of potassium permanganate for sludge disintegration was 100 mg/g total solids(TS),under which sludge disintegration degree and EPS concentration in the supernatant were 40.47%and 542.83 mg/L,respectively.(3)After sludge was treated by microwave combined with potassium permanganate,the cumulative biogas production within 30 d was 284 mL,which increased by 20.85%and 14.06%,respectively,compared to those of raw sludge and sludge treated by microwave irradiation.

关 键 词：城市剩余活性污泥 微波 高锰酸钾 污泥破解 胞外聚合物 

分 类 号：X703[环境科学与工程—环境工程]