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Distribution,characteristics and daily fluctuations of microplastics throughout wastewater treatment plants with mixed domestic-industrial influents in Wuxi City,China 被引量:1
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作者 Wei Shan Bingbing Li +4 位作者 Haichuan Zhang Zhenghao Zhang Yan Wang Zhiyang Gao Ji Li 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2022年第1期107-115,共9页
In wastewater treatment plants(WWTPs),microplastics(MPs)are complex,especially with mixed domestic–industrial influents.Conventional random grab sampling can roughly depict the distribution and characteristics of MPs... In wastewater treatment plants(WWTPs),microplastics(MPs)are complex,especially with mixed domestic–industrial influents.Conventional random grab sampling can roughly depict the distribution and characteristics of MPs but can not accurately reflect their daily fluctuations.In this study,the concentration,shape,polymer type,size,and color of MPs were analyzed by micro-Raman spectroscopy(detection limit of 0.05 mm)throughout treatment stages of three mixed domestic–industrial WWTPs(W1,W2,and W3)in Wuxi City,China,and the daily fluctuations of MPs were also obtained by dense grab sampling within 24 h.For influent samples,the average MP concentration of 392.2 items/L in W1 with 10%industrial wastewater was much higher than those in W2(71.2 items/L with 10%industrial wastewater)and W3(38.3 items/L with 60%industrial wastewater).White polyethylene granules with a diameter less than 0.5 mm from plastic manufacturing were the most dominant MPs in the influent of W1,proving the key role of industrial sources in MPs pollution.In addition,the daily dense sampling results showed that MP concentration in W1 influent fluctuated widely between 29.1 items/L and 4617.6 items/L within a day.Finally,few MPs(less than 4.0 items/L)in these WWTPs effluents were attributed to the effective removal of wastewater treatment processes.Thus,further attention should be paid to regulating the primary sources of MPs. 展开更多
关键词 Microplastic Wastewater treatment plant Mixed domestic-industrial influent Characteristic Daily fluctuation
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溶气气浮工艺用于城镇污水处理厂二级出水的深度除磷研究 被引量:12
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作者 隋克俭 李家驹 +5 位作者 李鹏峰 周勇 郑兴灿 孙永利 尚巍 唐力 《环境工程》 CAS CSCD 北大核心 2020年第7期66-70,65,共6页
以江苏省某城镇污水处理厂二级出水为研究对象,通过模拟试验及混凝+气浮深度除磷中试,探索了气浮工艺取代过滤工艺的深度除磷效果。结果表明:FeCl3的除磷效果最优,投加量为5 mg/L时可将出水ρ(TP)降至0.2 mg/L,投加量为15 mg/L时可将出... 以江苏省某城镇污水处理厂二级出水为研究对象,通过模拟试验及混凝+气浮深度除磷中试,探索了气浮工艺取代过滤工艺的深度除磷效果。结果表明:FeCl3的除磷效果最优,投加量为5 mg/L时可将出水ρ(TP)降至0.2 mg/L,投加量为15 mg/L时可将出水ρ(TP)降至0.05mg/L;气浮工艺对PAM的依赖性较强,需通过投加PAM保证水质达标稳定性和达到除磷效果(ρ(TP)<0.05 mg/L),PAM投加浓度为0.6 mg/L;溶气压力与回流比相关,当回流比为20%、溶气压力为0.6 MPa左右时,装置运行效果稳定;将污水中磷组分分为TP、STP、PO43--P和不可混凝磷组分,通过对进出水磷组分分析,表明气浮工艺对悬浮态TP和磷酸盐去除效果较好,对不可混凝磷组分无去除效果。 展开更多
关键词 溶气气浮 深度除磷 混凝剂 溶气压力 磷组分
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