Fang H H
Civil and Structural Engineering Department, University of Hong Kong.
J Dairy Sci. 1991 Jun;74(6):2015-9. doi: 10.3168/jds.S0022-0302(91)78371-9.
Wastewater from a whey processing plant was treated in two on-site pilot plants, a three-stage activated sludge plant and an anaerobic reactor, each of which had the capacity of treating 230 L/h of wastewater. The activated sludge treatment was very effective. It reduced 99% of 5-d biochemical oxygen demand of the plant wastewater (from an average of 1062 to 9 mg/L) and 91% of total Kjeldahl nitrogen (from 109 to 10 mg/L) after a total retention time of 19.8 h. The intermediate 5-d biochemical oxygen demand reductions were 86% after 3.8 h in the first stage and 97% after another 8 h in the second stage. The completely mixed anaerobic reactor reduced only 87% of 5-d biochemical oxygen demand after 2 d of retention. However, with an additional 8 h of activated sludge treatment the total 5-d biochemical oxygen demand was reduced by 99%. Both pilot plants were operated smoothly in spite of the considerable fluctuations in pollutant levels of the plant wastewater.
一家乳清加工厂的废水在两个现场中试装置中进行处理，一个是三级活性污泥处理厂，另一个是厌氧反应器，每个装置的废水处理能力均为230升/小时。活性污泥处理非常有效。在总停留时间为19.8小时后，它将该厂废水中99%的五日生化需氧量（从平均1062毫克/升降至9毫克/升）和91%的凯氏氮（从109毫克/升降至10毫克/升）去除。在第一阶段3.8小时后，中间五日生化需氧量的去除率为86%，在第二阶段再过8小时后为97%。完全混合厌氧反应器在停留2天后仅去除了87%的五日生化需氧量。然而，经过额外8小时的活性污泥处理后，五日生化需氧量的总去除率达到了99%。尽管该厂废水的污染物水平波动很大，但两个中试装置都运行平稳。
