膜科学与技术

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An example of “zero discharge” project of iron phosphate
wastewater from ammonia processes

Authors： ZHUANG Li，CHENG Junjun，DONG Kai，ZHENG Xiujun，DAI Qizhi

Units： Jiangsu Jiuwu High-Tech Co.， Ltd.， Nanjing 211808， China

KeyWords： iron phosphate; ceramic membrane; reverse osmosis; MVR; zero discharge

ClassificationCode：TQ028； X703

year,volume(issue):pagination： 2025,45(2):146-152

Abstract：

Taking the “zero discharge” project of iron phosphate production wastewater of an enterprise as an example, the “zero discharge” system with “ceramic membrane + reverse osmosis + MVR” as the core was introduced from the aspects of water quality characteristics, process flow, design parameters, treatment effect and economic benefits. The conductivity of recycled water was less than 10 μS/cm, and the quality of ammonium sulfate salt obtained by evaporation and crystallization met the requirements of type I products of “Fertilizer Grade Ammonium Sulfate” (GB/T 535-2020). Practice has proven that ceramic membranes could efficiently separate precipitates from wastewater from iron phosphate production, and had excellent regeneration performance. The pre-treatment process with ceramic membranes as the core ensured the stable operation of reverse osmosis and MVR systems. According to the conversion of treated water, the total operating cost was 2.51 yuan per ton of water, which could save 2.6 million tons of water every year, and had good economic and environmental benefits.

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AuthorIntro：

庄力（1994-），男，江苏镇江人，硕士研究生，主要研究方向为膜分离技术与应用

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