Reduction of water consumption and wastewater quantities in the food industry by

2019-06-21 01:09:12

water treatment processing low wastewater

责任者: Mavrov, V.;Belieres, E. 单位: Univ of the Saarland, Saarbruecken, Ger 来源出处: Desalination,2000,131(1-3):75-86 摘要: Due to the rising costs for fresh and wastewater, the treatment and reuse of low-contaminated process water streams from food processing companies is increasingly gaining in importance. In this study it was shown that water for reuse could be produced from this water by a specific treatment using membrane processes while achieving reduction of water consumption and wastewater quantities. Three examples of low-contaminated wastewater will be discussed: firstly a vapour condensate from milk processing, secondly chiller shower water from the meat processing industry and thirdly wash water from bottle washing machines. Due to the promising laboratory and pilot-scale experimental results, a demonstration plant with a capacity of 1-2m3/h, consisting of the following stages, was set up: pretreatment; main treatment - 1st nanofiltration stage; post-treatment - 2nd nanofiltration or low-pressure reverse osmosis stage and UV water disinfection. Economical water treatment was possible in all three examples. The treated low-contaminated process water from chiller showers or bottle washing machines was of drinking quality and therefore suitable for reuse. After treatment, the vapour condensate could be reused as boiler make-up water which is subject to higher standards than drinking water. The experimental technology underwent an authorization procedure at the Saarland Ministry for Health, Germany, and was granted approval. 关键词: Water recycling;Water conservation;Wastewater treatment;Dairy products;Packing plants;Bottling plants;Nanofiltration;Reverse osmosis;Disinfection;Potable water;Ultraviolet water disinfection;Low pressure reverse osmosis;Pretreatment