摘要
针对高负荷反应器中ANAMMOX颗粒污泥易上浮流失的问题,进行外源添加酰基高丝氨酸内酯类信号分子(AHLs)对污泥特性的影响研究.结果表明添加30mg/L辛酰基高丝氨酸内酯(C8-HSL)可对颗粒污泥沉降性能产生长期影响,能够有效控制高负荷UASB中ANAMMOX颗粒污泥上浮.仅在实验初期(0~20d)向反应器R2中添加C8-HSL,在实验进行至100d时R2中颗粒污泥B-EPS含量相比对照组R1降低15%,PN/PS值由4.22下降至2.14,同时污泥颗粒表面疏水性提高了26%,因此R2中颗粒污泥的沉降性能大幅提高(颗粒污泥密度增加了24%,沉速提高了90%).实验进行至100d,R2未发生较明显污泥上浮现象,此时氮容积负荷NLR为12.9kg-TN/(m3·d),氮容积去除率NRR高达11.3kg-TN/(m3·d),氮去除率达88%.己酰基高丝氨酸内酯(C6-HSL)可使污泥颗粒的活性有所提高,而十二烷酰基高丝氨酸内酯(C12-HSL)则对高负荷反应器中颗粒污泥的特性没有影响.
A typical setback of ANAMMOX granules was their flotation when the reactor was run at high loading rates.The effects of Acylated Homoserine Lactones(AHLs)on the characteristics of ANAMMOX granules in high-loaded UASB reactors were investigated.The results showed that the exogenous addition of 30mg/L N-octanoyl-PL-homoserine lactone(C8-HSL)had long-term effects on the settleability of ANAMMOX granules and was able to control the sludge floating effectively.At the beginning of the experiment(0~20d),C8-HSL was added to the reactor R2.While compared with the control group R1,the content of B-EPS in the granular sludge in R2was decreased by 15%and the granular sludge’s value of PN/PS dropped from 4.22 to 2.14 on the 100th day.In addition,the hydrophobicity of the granular sludge in R2 was increased by 26%on the 100th day.Therefore,the settleability of sludge granules in R2 was improved significantly(the density of the granules was increased by 24%,and the settling velocity of the granules was increased by 90%).During the 100days,no obvious granule floatation was observed in R2.On the 100th day,the NLR was 12.9kg-TN/(m3·d)and the NRR was up to 11.3kg-TN/(m3·d)in R2.At the same time,the nitrogen removal efficiency was up to 88%in R2.C6-HSL improved the activity of the granular sludge,while C12-HSL had no effects on the characteristics of the granules in the high-loaded reactors.
作者
张晶
张林华
姜冬冬
李军
李芸
张彦灼
ZHANG Jing;ZHANG Lin-hua;JIANG Dong-dong;LI Jun;LI Yun;ZHANG Yan-zhuo(The College of Architecture and Civil Engineering,The Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100124,China;Guangdong Shaogang Engineering Technology Co Ltd,Shaoguan 512123,China)
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2018年第2期532-541,共10页
China Environmental Science
基金
国家水体污染控制与治理科技重大专项(2015ZX07202-013)
作者简介
张晶(1988-),河北省沧州人,北京工业大学博士研究生,主要从事厌氧氨氧化工艺理论与应用的研究.发表论文2篇.;责任作者,教授,18810687629@126.com
