摘要
针对印染废水回用时水中有机物浓度、盐度和色度高等问题,以苏南某污水处理厂中试试验基地(70%以上为印染废水)二级生化出水为研究对象,对混凝沉淀-超滤(以下称组合工艺1)、BAC(生物活性炭滤池)-超滤(组合工艺2)和混凝沉淀-BAC-超滤(组合工艺3)3种工艺进行比较研究,系统考察其作为反渗透预处理技术的可行性.结果表明:组合工艺3对印染废水二级生化出水中CODCr、TCU(真色)及浊度的平均去除率分别为53.0%、49.2%和99.5%,UV254下降了50.0%,均高于其他2个组合工艺.对超滤膜表面污染阻力分布的测定可知,组合工艺3中不可逆污染造成膜污染的程度最轻.此外,3种组合工艺的出水通过反渗透装置后的平均脱盐率分别为98.0%、97.5%和98.2%.可见,针对该研究中涉及的二级生化出水,组合工艺3预处理工艺是反渗透预处理的最佳工艺.
To investigate solutions to the presence of organic compounds,salinity and high concentrations of color in dyeing wastewater,the feasibilities of three combined processes used as pretreatment for reverse osmosis were studied in a pilot-scale reactor. The three combined processes were coagulation-ultrafiltration（ combined process 1）,biological activated carbon filter（ BAC）-ultrafiltration（ combined process 2） and coagulation-BAC-ultrafiltration（ combined process 3）. The pilot-scale reactor influent was the secondary effluent from a wastewater treatment plant in southern Jiangsu. The results indicated that the removal efficiencies of CODCr,color,UV254 and turbidity in combined process 3 were 53. 0%,49. 2%,50. 0% and 99. 5%,respectively,which were higher than those of combined processes 1 and 2. According to the results of fouling resistance distribution on the ultrafiltration membrane,the membrane fouling of combined process 3 was the least irreversible. In addition,the average desalination efficiencies of reverse osmosis with the three combined processes as pretreatment reached 98. 0%,97. 5% and 98. 2%,respectively. The results indicated that combined process 3 was the optimal pretreatment among the three combined processes for reverse osmosis for the secondary effluent.
出处
《环境科学研究》
EI
CAS
CSSCI
CSCD
北大核心
2014年第7期742-748,共7页
Research of Environmental Sciences
基金
国家水体污染控制与治理科技重大专项(2012ZX07101-003)
关键词
印染废水
回用
组合工艺
反渗透预处理
中试
dyeing wastewater
reuse
combined process
pretreatment of reverse osmosis
pilot-scale
