摘要
利用PVC合金超滤膜中试装置与不同预处理组合成"混凝-超滤"、"混凝-沉淀-超滤"和"混凝-气浮-超滤"3种工艺处理微污染水库水,研究其净水效果及跨膜压差变化规律。结果表明:3种组合工艺的浊度去除率均在99%以上;镜检出水细菌、藻类含量基本接近零;对CODMn、UV254的去除效果顺序为:"混凝-气浮-超滤">"混凝-沉淀-超滤">"混凝-超滤";红外光谱分析结果显示,亲水性有机物是引起膜污染的主要物质;低温低浊期,跨膜压差随着产水时间变化趋势线的斜率为0.016 4、跨膜压差平均值为23.57 k Pa;高温高藻期斜率为0.043 2、跨膜压差平均值为21.28k Pa。
In this study,the PVC alloy ultrafiltration（ UF） membrane pilot device and different pretreatment processes were used to develop three processes,including the coagulation-UF,coagulation-sedimentation-UF,and coagulation-flotation-UF processes,for the treatment of slightly-polluted reservoir water. The water purification effects of these processes and the changing pattern of the transmembrane pressure（ TMP） were analyzed. The results show that the turbidity removal rate was above 99% when the three processes were used; almost no algae or bacteria were detected in the outflow through microscopic examination; the three processes can be ranked by their effects in removing CODMnand UV254 in the following descending order： coagulation-flotation-UF,coagulationsedimentation-UF,and coagulation-UF; the results of ATR-FTIR show that hydrophilic organic matter was the main substance causing membrane fouling; during the low-temperature and low-turbidity period,the slope of the variation trend line of the TMP was 0. 016 4,and the average TMP was 23. 57 k Pa; and,during the high-temperature and algae-laden period,the slope was 0. 043 2,and the average TMP was 21. 28 k Pa.
出处
《水资源保护》
CAS
CSCD
2016年第3期89-93,共5页
Water Resources Protection
关键词
微污染水库水
超滤膜
预处理
跨膜压差
膜污染
膜通量
PVC合金超滤膜
slightly-polluted reservoir water
ultrafiltration membrane
pretreatment
transmembrane pressure
membrane fouling
membrane flux
PVC alloy ultrafiltration membrane
