采用膜生物反应器对高强度果蔬加工废水进行潜在的水资源回用。

Potential Water Reuse for High Strength Fruit and Vegetable Processor Wastewater with an MBR.

作者信息

Moore Adam W, Zytner Richard G, Chang Sheng

机构信息

University of Guelph, School of Engineering, 50 Stone Road East, Guelph, Ontario, Canada.

出版信息

Water Environ Res. 2016;88(9):852-870. doi: 10.2175/106143016X14609975747649.

DOI:10.2175/106143016X14609975747649

PMID:27654083

Abstract

High strength food processing wastewater from two processing plants was studied to determine the effectiveness of an aerobic membrane bioreactor (MBR) to reduce BOD, TSS and nutrients below municipal sewer discharge limits. The MBR comprised a 20 L lab-scale reactor combined with a flat sheet, ultrafiltration membrane module. The parameters studied included the operational flux, solids and hydraulic retention times and recirculation ratio with regards to nitrification/denitrification. The MBR system provided excellent removal efficiency at 97% COD, 99% BOD, 99.9% TSS, 90% TKN, and 60% TP for both processing plants, which eliminated the surcharges, allowing the firms to stay competitive. Effluent reuse tests showed that activated carbon proved effective in removing color from the MBR permeate, while UV treatment was able to achieve a 5 log reduction in bacteriophage. Overall, these treatment successes show the potential for water reuse in the agrifood sector.

摘要

对来自两家加工厂的高强度食品加工废水进行了研究，以确定好氧膜生物反应器（MBR）将生化需氧量（BOD）、总悬浮固体（TSS）和营养物质降低到城市下水道排放限值以下的有效性。该MBR包括一个20升的实验室规模反应器和一个平板超滤膜组件。研究的参数包括运行通量、固体和水力停留时间以及与硝化/反硝化有关的回流比。MBR系统对两家加工厂的化学需氧量（COD）去除率达97%、BOD去除率达99%、TSS去除率达99.9%、总凯氏氮（TKN）去除率达90%、总磷（TP）去除率达60%，提供了出色的去除效率，消除了附加费，使企业保持竞争力。出水回用测试表明，活性炭在去除MBR渗透液中的颜色方面被证明是有效的，而紫外线处理能够使噬菌体数量减少5个对数级。总体而言，这些处理成果显示了农业食品部门中水回用的潜力。