Affiliation:
1. RWESCK, Department of Civil Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, PMB, Ghana
Abstract
Abstract
Alum, the predominant coagulant in conventional drinking water treatment schemes, has various disadvantages including the production of large volumes of sludge, lowering water pH (requiring pH adjustment using lime), limited coagulation pH range of 6.5 to 8.0, etc. At the Barekese Water Treatment Plant in Ghana, an alternative, the polyelectrolyte – polyaluminium chloride (PAC) is also used in coagulation but limited information is available on the operating conditions required to achieve better performance than alum-based coagulation. The aim of this study was to determine the optimal coagulant dose, mixing speed and operating pH for enhanced performance in water treatment. The effects on the treatment process of three different sets of mixing speed pairs – 180/40, 180/25 and 150/25 revolutions per minute (fast/slow) – in a pH range of 6.5 to 8.0 were investigated. The mixing speed and PAC dose yielding the best coagulation were 150/25 rpm and 15 mg/L respectively. The optimal pH range for PAC coagulation performance was 7.5 to 8.0.
Subject
Water Science and Technology
Reference16 articles.
1. The use of polyaluminium chloride for removing colour, COD, and ammonia from semi-aerobic leachate;Int. J. Environ. Eng.,2009
2. Cold water effects on enhanced coagulation of high DOC, low turbidity water;Water Qual. Res. J. Canada,2001
3. Assessment of water quality parameters in the stream Galyan, Trabzon, Turkey;Environ. Monit. Assess.,2010
4. Effects of pH, dosage, temperature and mixing speed on the efficiency of water melon seed in removing the turbidity and colour of Atabong River, Awka-Ibom State, Nigeria;Int. J. Adv. Eng., Manage. Sci. (IJAEMS).,2017
5. Using polyaluminium coagulants in water treatment,2001
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献