皮革工业园区废水反渗透处理与膜污染特性研究

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中图分类号：TU992.3 文献标志码：A

Reverse Osmosis Treatment of Wastewater in Leather Industrial Park and Membrane Contamination Characteristics

DUANMU Xianggan ，MA Kun，YUE Xin，MA Tao  ， LIU Guicai ， XIE Kang

1.School of Civil Engineering and Architecture，University of Jinan，Jinan 25oO22，Shandong，China; 2.Shandong Academy of Environmental Science Co.，Ltd.，Jinan 25oO13，Shandong，China）

Abstract：To investigate thetreatment efectof reverse osmosis systemon industrial wastewater and the characteristics of membranecontamination，firstly，ultrafitration pretreatment was carriedoutonthe wastewater from the leather industrial park，then，using the membrane flux anddesalinationrateas theresponse values，and surfaceflowrate，operating pressure and polyaspartic acid concentration as the parameters，orthogonal experimentswereused to optimize theoperating parameters of reverse osmosis system，and the removal efect of the reverse osmosis system on organic and inorganic substances in high and low salinity were measured.The membrane contaminating componentsand membrane surface propertieswereanalyzed throughburning experimentandinterfacialfree energydata，andit wastried torestore membraneflux by cleaningthe contaminated membrane.The results show that theultrafiltration pretreatmentcan reduce the polution load of thereverse osmosis system，and theoptimiedoperating parameters ofthereverse osmosis system arethat thesurfac flow rate is 31m/h ， operating pressure is 2MPa ，and mass concentration of polyaspartic acid is 3mg/L ，and the average removalratesofCOD，totalnitrogen，totalphosphorus，chloride，calcium ionandtotalhardnessinthelong termoperationof the system with high and low salinity are 100% ， 96.5% ， 98.0% ， 96.5% ， 94.3% and 94.5% ，respectively. Inorganic substances in the membrane surface contaminants accounts for 87.0% ，and the repulsion is weakened between the membrane surfaceand the polutant，andthe hydrophobicityof the membrane surface isenhanced inthe late stageofoperation. After physical cleaning，alkali washing，acid washing，chelating agent cleaning，the membrane surface morphology and membrane flux are basically restored to the initial state.

Keywords ： reverse osmosis membrance； industrial wastewater; membrane contamination； membrane flux

伴随着城镇化和工业化进程的加速推进，我国在经济社会实现高质量发展目标的同时，也面临着严重的污废水排放问题，每年污水排放总量从2018年的 5.21×1010m3 增加至2022年的 6.25× 1010m3[1] 。（剩余9215字）