摘要
为了降低新鲜水的需求量,缓解水资源压力,对某化工园区污水处理厂进行了提标改造及再生水回用。以混凝沉淀+A^2/O为预处理工艺,构建中试MBR+RO组合系统,深度处理及再生利用化工废水,考察了MBR工艺作为RO预处理的可行性以及组合系统的处理性能,分析了MBR膜组件及RO膜组件的污染情况,评价了最终处理成本。研究表明,废水经过混凝沉淀+A^2/O预处理后进入MBR+RO组合系统,最终出水ρ(COD)≤10 mg/L,ρ(NH^+_4-N)≤2 mg/L,ρ(SS)≤1 mg/L,ρ(TP)≤1 mg/L,水质达到城市污水再生利用工业用水标准(GB/T 19923-2005);MBR膜跨膜压差稳定在18 kPa,说明没有发生膜污染;RO膜渗透系数稳定在4 L/(min·MPa),也没有发生污染;中试系统吨水电耗为1.890 kW·h。高性能再生水水质具有明显优势,降低了企业的运行成本。
In order to reduce the demand of fresh water and ease the pressure about water resources,it is proposed to carry out bid improvement and recycling water reuse of the sewage treatment plant in the park.The combined MBR+RO process pilot system,using flocculation+A2/O technology as a pre-treatment process,has been set up for the advanced treatment and recovery.The objective of this pilot study is to further investigate the feasibility of MBR system as a pre-treatment process for RO permeation.The treatment performance of the combined pilot system is investigated,the pollution of MBR and RO membrane and the final treatment cost are evaluated.The results show that the RO permeate qualities are as follows:ρ(COD)≤10 mg/L,ρ(NH+4-N)≤2 mg/L,ρ(SS)≤1 mg/L,ρ(TP)≤1 mg/L,and the RO effluent can completely meet the urban recycling water quality standard for industrial uses(GB/T 19923-2005).The MBR membrane pressure is stabilized at 18 kPa,showing no membrane fouling,and the RO membrane permeability coefficient is stabilized at 4 L/(min·MPa),showing both have no severe bio-fouling occurring.During the whole process,the electricity consumption is 1.890 kW·h.The high performance reclaimed water quality has obvious superiority and reduces the operation cost of the enterprise.
作者
张明
张金峰
张思聪
ZHANG Ming;ZHANG Jinfeng;ZHANG Sicong(Hebei Heteng Urban and Rural Planning and Design Limited Liability Company,Shijiazhuang,Hebei 050000,China;Urban and Rural Planning and Design Research Institute of Hebei Province,Shijiazhuang,Hebei 050000,China;College of Energy and Environmental Engineering,Hebei University of Architecture,Zhangjiakou,Hebei 075000,China)
出处
《河北工业科技》
CAS
2019年第2期135-141,共7页
Hebei Journal of Industrial Science and Technology
基金
河北省科技计划项目(16272510)
关键词
水污染防治工程
MBR+RO组合工艺
深度处理
废水再生利用
膜污染
能耗
water pollution control engineering
combined MBR+RO process
advanced treatment
wastewater recovery
membrane fouling
energy consumption
