摘要
采用改性凝胶球包埋活性污泥,并将其用作毒性预警中的优化生物载体,结合水相指标和微生物活性指标,综合分析重金属对水质和凝胶球包埋活性污泥的影响。结果表明,经聚氧化丙烯三醇(PPT)改性的凝胶球具有较大的比表面积和较小的孔径。当进水中存在Zn^2+、Cd^2+和Cr^6+时,水相指标pH值、电导率和氧化还原电位(ORP)均存在明显的变化;比耗氧速率(SOUR)、氨氧化速率(AUR)和污泥电子传递体系(ETS)活性等微生物活性指标也与重金属种类和浓度相关;微量重金属有助于提高微生物活性,但高浓度重金属则会抑制微生物活性。Zn^2+、Cd2+和Cr6+对ETS活性的半抑制浓度分别为8. 71、44. 11和19. 94 mg/L。
Activated sludge was embedded in modified gel sphere and was used as an optimized biological carrier in toxicity warning,and the effects of heavy metals on water quality and activated sludge embedded in gel sphere were comprehensively analyzed in combination with water phase indexes and microbial activity indexes. Gel spheres modified by polyoxypropylene triol (PPT) had higher specific surface area and smaller pore size. The p H,conductivity and oxidation reduction potential (ORP) of the sewage were significantly influenced by Zn^2+,Cd^2+ and Cr^6+. Microbial activity indexes such as specific oxygen uptake rate (SOUR),ammonia uptake rate (AUR) and electron transport system (ETS),were closely related to heavy metal species and concentrations. Trace heavy metals could improve microbial activity,but high concentrations of heavy metals could inhibit microbial activity. The semi-inhibitory concentrations of Zn^2+,Cd2+ and Cr6+ on ETS activity were 8. 71 mg/L,44. 11 mg/L and 19. 94 mg/L,respectively.
作者
陈明飞
许海琴
蒋秋明
王兴荣
杨志科
李冰冰
王燕
李激
CHEN Ming-fei;XU Hai-qin;JIANG Qiu-ming;WANG Xing-rong;YANG Zhi-ke;LI Bing-bing;WANG Yan;LI Ji(School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China;Shanghai SIIC-Longchuang Smarter Energy Technology Co.Ltd.,Shanghai 200436,China;Wuxi Puhui Environmental Protection Technology Co.Ltd.,Wuxi 214028,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,China;Jiangsu University Water Treatment Technology and Materials Collaborative Innovation Center,Suzhou 215009,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第3期8-15,共8页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2017ZX07202-001-004)。
关键词
活性污泥
重金属
改性凝胶球
包埋颗粒
毒性预警
activated sludge
heavy metal
modified gel sphere
embedded particle
toxicity warning
