无机混凝剂处理乳品废水：参数和处理研究。
Treatment of dairy wastewater by inorganic coagulants: Parametric and disposal studies.
机构信息
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
出版信息
Water Res. 2010 Dec;44(20):5867-74. doi: 10.1016/j.watres.2010.07.001. Epub 2010 Jul 30.
Present study reports treatment of simulated dairy wastewater (SDW) by inorganic coagulants such as poly aluminum chloride (PAC), ferrous sulphate (FeSO(4)) and potash alum (KAl(SO(4))(2)·12H(2)O). Batch coagulation experiments were conducted to evaluate the influence of initial pH (pH(i): 5-10) and coagulant dosage (m: 100-5000 mg/L) on chemical oxygen demand (COD) removal from SDW. Residual COD and system pH were observed as function of time. Optimum pH(i) (pH(i,op)) was found to be 8.0 for all the three coagulants. Optimum m (m(op)) was found to be 300, 800 and 500 mg/L for PAC, FeSO(4) and KAl(SO(4))(2)·12H(2)O, respectively, giving 69.2, 66.5 and 63.8% COD removal efficiency in 30 min. Heating values of the sludge generated by the coagulants PAC, FeSO(4) and KAl(SO(4))(2)·12H(2)O were found to be 20.7, 29.6 and 17.3 MJ/kg, respectively.
本研究报告了使用无机混凝剂（如聚合氯化铝（PAC）、硫酸亚铁（FeSO4）和钾明矾（KAl（SO4）2·12H2O）处理模拟乳制品废水（SDW）的情况。进行了批量混凝实验，以评估初始 pH 值（pH(i): 5-10）和混凝剂用量（m: 100-5000 mg/L）对 SDW 中化学需氧量（COD）去除的影响。观察了残余 COD 和系统 pH 值随时间的变化。发现所有三种混凝剂的最佳 pH 值（pH(i,op)）均为 8.0。发现 PAC、FeSO4 和 KAl（SO4）2·12H2O 的最佳 m 值（m(op)）分别为 300、800 和 500 mg/L，在 30 分钟内可分别达到 69.2%、66.5%和 63.8%的 COD 去除效率。生成的 PAC、FeSO4 和 KAl（SO4）2·12H2O 污泥的发热值分别为 20.7、29.6 和 17.3 MJ/kg。
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