This research involved attempting to improve water quality at the Abu-Rawash WWTP by using aluminum chloride (AlCl3) as a coagulant combined with injection of carbon dioxide (CO2). The Abu-Rawash WWTP is the main sour...This research involved attempting to improve water quality at the Abu-Rawash WWTP by using aluminum chloride (AlCl3) as a coagulant combined with injection of carbon dioxide (CO2). The Abu-Rawash WWTP is the main source of water quality degradation at the Rosetta branch, Egypt. Sewage samples were collected from the effluent of the grit removal chamber. Jar tests were performed to estimate the optimum pH value and the coagulant dosage required to obtain acceptable treatment. Eleven samples were prepared with equal dosages of aluminum chloride (10.0 mg/L) and different pH values. The optimal pH values for the elimination of the biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), and turbidity ranged from 6.10 to 6.20 for the aluminum chloride. Results indicated that the appropriate AlCl3 dosage was 2.0 mg/L, especially at pH between 6.1 and 6.2. The results also showed that the AlCl3 was cost effective, especially after reducing pH value. It is also more cost effective than the other proposed solutions such as changing the effluent path of the Abu-Rawash WWTP to the desert.展开更多
2020年,随着上海市白龙港污水处理厂污泥处理处置二期工程建成投运,白龙港厂污泥处理系统的处理规模达486 t DS/d,为国内乃至亚洲最大的城镇污泥“厌氧消化+干化焚烧”处理系统,厌氧消化和干化焚烧工艺相结合的污泥处理路线并大规模工...2020年,随着上海市白龙港污水处理厂污泥处理处置二期工程建成投运,白龙港厂污泥处理系统的处理规模达486 t DS/d,为国内乃至亚洲最大的城镇污泥“厌氧消化+干化焚烧”处理系统,厌氧消化和干化焚烧工艺相结合的污泥处理路线并大规模工程应用在国内尚属首次。文章结合污泥厌氧消化系统大修停运前后,对该污泥处理系统中脱水、干化、焚烧运行情况的影响进行了分析比对,包括污泥性质、处理量、运行成本等方面。结果表明,对于该系统而言,污泥厌氧消化工艺有利于污泥干化焚烧的经济、稳定运行,对污泥处理系统碳减排、碳中和具有非常重要的作用,符合绿色、循环、低碳、生态的要求。展开更多
文摘This research involved attempting to improve water quality at the Abu-Rawash WWTP by using aluminum chloride (AlCl3) as a coagulant combined with injection of carbon dioxide (CO2). The Abu-Rawash WWTP is the main source of water quality degradation at the Rosetta branch, Egypt. Sewage samples were collected from the effluent of the grit removal chamber. Jar tests were performed to estimate the optimum pH value and the coagulant dosage required to obtain acceptable treatment. Eleven samples were prepared with equal dosages of aluminum chloride (10.0 mg/L) and different pH values. The optimal pH values for the elimination of the biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), and turbidity ranged from 6.10 to 6.20 for the aluminum chloride. Results indicated that the appropriate AlCl3 dosage was 2.0 mg/L, especially at pH between 6.1 and 6.2. The results also showed that the AlCl3 was cost effective, especially after reducing pH value. It is also more cost effective than the other proposed solutions such as changing the effluent path of the Abu-Rawash WWTP to the desert.
文摘2020年,随着上海市白龙港污水处理厂污泥处理处置二期工程建成投运,白龙港厂污泥处理系统的处理规模达486 t DS/d,为国内乃至亚洲最大的城镇污泥“厌氧消化+干化焚烧”处理系统,厌氧消化和干化焚烧工艺相结合的污泥处理路线并大规模工程应用在国内尚属首次。文章结合污泥厌氧消化系统大修停运前后,对该污泥处理系统中脱水、干化、焚烧运行情况的影响进行了分析比对,包括污泥性质、处理量、运行成本等方面。结果表明,对于该系统而言,污泥厌氧消化工艺有利于污泥干化焚烧的经济、稳定运行,对污泥处理系统碳减排、碳中和具有非常重要的作用,符合绿色、循环、低碳、生态的要求。
