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中国精品科技期刊2020
张超杰,杨春燕,殷昊,等. 乳制品加工废水的深度处理及资源回用研究进展与策略[J]. 食品工业科技,2022,43(22):422−428. doi: 10.13386/j.issn1002-0306.2021100175.
引用本文: 张超杰,杨春燕,殷昊,等. 乳制品加工废水的深度处理及资源回用研究进展与策略[J]. 食品工业科技,2022,43(22):422−428. doi: 10.13386/j.issn1002-0306.2021100175.
ZHANG Chaojie, YANG Chunyan, YIN Hao, et al. Researches and Strategies on Advanced Treatment and Resources Recycling of Dairy Wastewater[J]. Science and Technology of Food Industry, 2022, 43(22): 422−428. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021100175.
Citation: ZHANG Chaojie, YANG Chunyan, YIN Hao, et al. Researches and Strategies on Advanced Treatment and Resources Recycling of Dairy Wastewater[J]. Science and Technology of Food Industry, 2022, 43(22): 422−428. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021100175.

乳制品加工废水的深度处理及资源回用研究进展与策略

Researches and Strategies on Advanced Treatment and Resources Recycling of Dairy Wastewater

  • 摘要: 乳制品加工废水是一种典型的食品工业废水,因其具有排水量大、有机物含量高、水质稳定性差等特点,直接排放极易污染受纳水体。乳制品加工废水的深度处理及资源回用已成为实现该行业可持续发展的关键。本文对近年来乳制品加工废水的处理方法和资源化开发的相关研究进行概括总结,分析了各种方法的优势和工业应用的瓶颈问题,并提出了一种泡沫分离-序列间歇式活性污泥法(sequencing batch reactor,SBR)-膜分离相结合的废水综合处理策略。首先,利用泡沫分离法回收乳制品加工废水中的酪蛋白,泡沫液中的沉淀物质可作为牲畜饲料添加剂,而溶液可用作微生物发酵的培养基来合成清洁燃料或构建微生物燃料电池。随后,运用SBR法降低出水的COD、BOD5和磷酸盐含量。最后,利用膜分离法脱除废水中的硝酸盐,并将其用于生产生物肥料。该策略的废水深度处理周期较短,浓缩液处理后可实现资源回收,淡化液可作为循环冷却或农田灌溉用水使用。

     

    Abstract: Dairy wastewater is a typical food-processing wastewater. The direct discharge of dairy wastewater is easy to cause serious pollution of accepting water body due to its characters of large discharging amount, high organic content and weak water's quality stability. The advanced treatment and resources recycling of dairy wastewater have become a key to achieving the sustainable development of dairy industry. In this work, the current researches on the treating methods and resources recovery of dairy wastewater are reviewed. Though analyzing the advantages and application bottlenecks of various methods, a comprehensive strategy integrating foam fractionation, sequencing batch reactor (SBR) and membrane separation is proposed. Firstly, foam fractionation have been used to recover casein from dairy wastewater. The precipitates in the foamate could be used as the feed additives of livestock. The foamate could be served as the fermentation medium of microorganisms for synthesizing biofuels or constructing microbial fuel cells. Subsequently, SBR method is used to further reduce the chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and phosphate content in the effluent. Finally, the nitrites in the effluent of SBR are removed by using membrane separation and they would be used in biofertilizer production. The advanced treatment period of dairy wastewater in this strategy is short and the resources recovery from the concentrated solutions is easy to perform. Furthermore, the dilute solution of membrane separation could be used in circulation cooling operation and farm irrigation.

     

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