【摘要】 京杭运河水的有机物含量较高,不能直接用于反渗透进水,为此在静态试验的基础上进行了动态模拟试验。试验系统主要由两级混凝澄清器、细砂过滤器和两级活性炭过滤器组成。根据试验结果,提出了适用于运河水预处理的工艺参数,其主要包括一级澄清器的上升流速、泥渣回流比,二级澄清器上升流速,混凝剂、助凝剂、低浊添加剂、粉状活性炭等的加入剂量以及活性炭的选型。同时,确定了该工艺下运河水用于反渗透进水的极限有机物浓度。试验结果表明,在原水CODMn最大值为17.62 mg/L的情况下,系统出水水质可以满足反渗透装置对进行水质要求,即CODMn<3.0 mg/L、浊度<1.0FTU、SDI值<5.0。更多还原

【Abstract】 The organic matter content in water of Jing-Hang Canal is higher,hence,the water in said canal can’t directly be used as intaking water for reverse-osmosis system.For this,based on static test,a test of dynamic simulation has been carried out.The test system is mainly constituted from two-stage coagulating clarifier,a fine sand filter,and two-stage activated carbon filter.Based on the results of test,technological parameters suitable for pretreatment of the canal water have been put forward,including mainly the upward flow rate in first-stage clarifier,the return flow ratio of sludge,the upward flow rate in secondary-stage clarifier,the dosage of cuagulant,coagulation aid,low turbidity additive,and powdered activated carbon etc.,as well as type selection of the activated carbon.At the same time,the limited concentration of organic matters in the canal water used as intaking water forreverse-osmosis system in said technology has been determined.Results of test show that the quality of effluent water from the system can satisfy the requirements of intaking water of reverse-osmosis system under condition of the maximum value of CODMn in the raw water being 17.62 mg/L,the said requirements are CODMn<3.0 mg/L,turbiclity<1.0FTU,and SDI value<0.50.更多还原