摘要
考察了混凝/微滤工艺用于反渗透海水淡化预处理的可行性,并通过调整FeCl3和粉末活性炭(PAC)投量来确定最佳运行条件。结果表明,当FeCl3投量为2.5mg/L(以Fe3+计)、PAC耗量为40mg/L时处理效果最好,出水浊度<0.1NTU,污泥淤塞指数SDI<1.5,CODMn平均去除率为24%,满足反渗透的进水水质要求。此外,混凝及PAC的吸附作用可使海水中粒径<0.22μm的颗粒物变大,从而被微滤膜截留,这是出水水质良好的保证。
The feasibility of the coagulation/microfiltration process used for pretreatment of seawater desalination in reverse osmosis （RO） system was investigated, and the optimum operating condition was determined by adjusting the dosage of FeCl3 and powdered activated carbon （PAC）. The result shows that at FeCl3 dosage of 2.5 mg/L （calculated as Fe^3＋ ） and PAC consumption of 40 rag/L, the optimum treatment effect can be achieved, with turbidity 〈 0.1 NTU, SDI 〈 1.5, and CODMn, removal rate of 24% in treated water, and thus meeting the requirement for influent quality to the RO system. In addition, coagulation and adsorption of PAC can enlarge the particles with size less than 0.22 μm in seawater, and then they can be trapped on microfiher membrane, so that a good treated water quality can be guaranteed.
出处
《中国给水排水》
CAS
CSCD
北大核心
2005年第11期50-52,共3页
China Water & Wastewater
关键词
海水淡化
预处理
反渗透
混凝
微滤
粉末活性炭
seawater desalination
pretreatment
reverse osmosis
coagulation
microfiltration
powdered activated carbon
