ZHANG Cai-yun,ZHANG Peng-chuan,YUAN Lu-lu,et al.Design and Engineering Verification of Nanofiltration Process for Super High Standard Phosphorous Removal in Wastewater Reclamation[J].China Water & Wastewater,2021,37(10):116-119.
超高标准除磷的纳滤再生水工艺设计及工程验证
- Title:
- Design and Engineering Verification of Nanofiltration Process for Super High Standard Phosphorous Removal in Wastewater Reclamation
- Keywords:
- wastewater reclamation; phosphorous removal; NF; MBR
- 摘要:
- 云南大理某城镇污水处理厂设计产水水质达到地表水Ⅲ类标准（湖、库），采用膜生物反应器（MBR）-纳滤（NF）双膜处理工艺。针对产水总磷≤0.05 mg/L的超高标准除磷需求，对该项目的NF工艺段进行除磷衡算和膜系统设计分析，确定了浓水分段双回流、两段元件排列比4 ∶1的最佳工况条件。实际工程验证结果表明,产水水质稳定达标，其中总磷为0.013~0.042 mg/L，NF工艺段的电耗、药剂、耗材及膜折旧成本合计0.37~0.55元/m3，NF膜系统清洗周期约为1个月。MBR-NF双膜工艺的常规产水水质指标达到地表水Ⅲ类标准（湖、库），并具有较高的环境生态安全性，适用于富营养化敏感水体治理、工业水回用、再生水地下回灌等。
- Abstract:
- To meet the effluent quality as level Ⅲ criteria of Environmental Quality Standards for Surface Water (GB 3838-2002) (S-Ⅲ), the MBR-NF process was applied in a municipal wastewater treatment plant (WWTP) in Dali, Yunnan Province. Aiming at the super high effluent requirement of TP≤0.05 mg/L, the phosphorus removal balance and membrane system design were analyzed for the NF process section of this project, and the optimal working conditions of double reflux of concentrate and 4 ∶1 ratio of two-section element arrangement were determined. The verification results of actual project show that the water quality is stable and up to the standard. Among them, the effluent TP concentration was 0.013-0.042 mg/L. The operational cost including energy, chemicals, consumption materials and NF membrane depreciation was 0.37-0.55 yuan/m3. The duration of a membrane cleaning cycle was about a month. The common effluent indexes of MBR-NF process can meet S-Ⅲ, and have high safety to environmental ecosystem, which is suitable for wastewater treatment in eutrophication sensitive areas, industrial water reuse and wastewater reclamation for groundwater recharge.
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