Title: Effect of organic polymeric coagulation aid on low temperature and low turbidity river-net water treatment
Abstract:For the purpose of improving the effect of inorganic coagulant on turbidity removal from low tem-perature and low turbidity micro-polluted river-net water,polydimethyl diallyl ammonium chloride(PDM) w...For the purpose of improving the effect of inorganic coagulant on turbidity removal from low tem-perature and low turbidity micro-polluted river-net water,polydimethyl diallyl ammonium chloride(PDM) with different intrinsic viscosity were composited with polyaluminum chloride(PAC) and two kinds of inorganic composite PAC on sale respectively.The impact of inorganic coagulant sorts and their composite ratio with PDM on turbidity removal from low temperature and low turbidity,micro-polluted river-net water were investigated.The results showed that,for the low temperature and low turbidity river-net water with 4.5-8NTU initial turbidity and temperature 7-10 ℃,under the intensity similar with actual production,the necessary dosage of PAC,composite PAC 1 and composite PAC 2 were 4.0mg/L,3.5mg/L,2.8mg/L respectively when 2NTU residual turbidity was required for the effluent water.Compared with the single use of the inorganic coagulants,using PDM with intrinsic viscosity 0.52 dL/g,1.47 dL/g and 2.46 dL/g as coagulant aid,composite coagulants PAC/PDM,composite PAC 1/PDM,composite PAC 2/PDM with the ratios of inorganic composite PAC to PDM of 20:1,10:1 and 5:1 could decrease the original inorganic reagent dose by 10%-25%,8.6%-28.6%,7.1%-28.6% respectively,moreover,the lower the inorganic composite PAC-PDM composite ratio was as well as thehigher the intrinsic viscosity of PDM was,the better the turbidity removal performance of the composite coagulants would be.It could draw a conclusion that,PDM could improve the effect of turbidity removal remarkably in treatment of low temperature and low turbidity river-net water.Read More
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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