污泥热水解滤液作污水反硝化碳源的脱氮性能  

Performance of sludge thermal hydrolyzed liquor as carbon source for sewage denitrification

作　　者：韩露 韩芸[1] 代洋 张进 钟晨 卓杨[1] HAN Lu;HAN Yun;DAI Yang;ZHANG Jin;ZHONG Chen;ZHUO Yang(School of Municipal and Environmental Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China;Gezhouba Group Water Operation Co.Ltd.,Wuhan 430000,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]中国葛洲坝集团水务运营有限公司,湖北武汉430000

出　　处：《中国环境科学》2021年第8期3653-3659,共7页China Environmental Science

基　　金：国家自然科学基金资助面上项目(52070153);陕西省重点研发计划项目(2020SF-357,2019ZDLSF06-05)。

摘　　要：以污泥热水解滤液作为外加碳源,通过对SBR反应器脱氮效果、碳氮平衡及活性污泥EPS的分析,探究了污泥热水解滤液的脱氮性能,并与传统碳源乙酸钠进行了比较.结果表明,污泥热水解滤液和乙酸钠作为碳源可将出水TN从27.64mg/L分别降至12.05mg/L和7.98mg/L,说明两种碳源的投加均能强化反硝化过程;通过碳氮平衡分析可以看出,未加入碳源时污水TN去除率只有47.83%,加入热水解滤液后污水的TN去除率达到了81.30%,且滤液增加的氮负荷远远小于滤液作为外加碳源去除污水中TN的量;加入热水解滤液和乙酸钠时,活性污泥的EPS均有增加,但乙酸钠为碳源时的EPS含量更高,而EPS的增加引起了污泥SVI的增大.The denitrification performance of sludge thermal hydrolyzed(TH)liquor,as an external carbon source,was investigated by analyzing the nitrogen removal efficiency of a lab-scale sequencing batch reactor(SBR),the nitrogen and carbon mass balance,and the variations of extracellular polymeric substances(EPS)of activated sludge,along with the comparison of the results with sodium acetate,as a traditional carbon source.The results showed that the total nitrogen(TN)concentrations of effluent were reduced from 27.64 mg/L to 12.05 mg/L with the dosage of TH liquor and 7.98 mg/L with the dosage of sodium acetate,respectively,indicating that the nitrogen removal ability could be improved by them.The nitrogen and carbon mass balance analysis results revealed that the TN removal efficiency was increased from 47.83%to 81.30%due to the dosage of TH liquor.Meanwhile,the nitrogen removal amount improved by TH liquor significantly exceeded the nitrogen added into the system.The introducing of TH liquor and sodium acetate could increase the EPS concentrations of activated sludge,especially the sodium acetate,which could lead a higher sludge volume index(SVI).

关 键 词：低COD/TN城市污水 污泥热水解滤液 外加碳源 反硝化脱氮 EPS 

分 类 号：X703[环境科学与工程—环境工程]