Abstract: According to the characteristics of wastewater from food (mainly jelly) production, the combined process "Pretreatment+Air fioatation+Anaerobic+Aerobic" has been used for its treatment. The running results show that the process treatment effectiveness is good, and runs stably. The total removing rate of COD is 97%, total removing rate of BOD₅ 98.5%, total removing rate of SS 94.9%, total removing rate of animal and plant oil 93.4%, and total removing rate of ammonia nitrogen 85.7%. Every index of the effluent is superior to the medium secondary standard requirements of Integrated Wastewater Discharge Standard(GB 8978—1996).

Key words: jelly food wastewater, pretreatment, air flotation, anaerobic, aerobic

摘要： 根据以果冻为主的食品生产废水的特点，采用“预处理+气浮+厌氧+好氧”的综合工艺进行处理。运行结果表明，该工艺处理效果良好，运行稳定，系统总COD去除率达97%，BOD₅总去除率达98.5%，SS总去除率达94.9%，动植物油总去除率达93.4%，氨氮总去除率达85.7%。出水各项指标均优于《污水综合排放标准》（GB 8978—1996）中二级标准的要求。

关键词: 果冻食品废水, 预处理, 气浮, 厌氧, 好氧

CLC Number: 

• X703.1