Treatment method of secondary wastewater of kitchen waste

一种餐厨垃圾二次废水的处理方法

Abstract

The invention discloses a treatment method of secondary wastewater of kitchen waste. The treatment method comprises the following steps of: (1) carrying out materialization pretreatment on kitchen wastewater to remove floater, animal or vegetable butter, oil and SS (suspended matter) in the wastewater; (2) carrying out the two-stage hydrolysis acidification-IC (internal circulation) anaerobic reaction treatment and biochemical treatment of an aerobiont separation bed on the wastewater; and (3) carrying out flocculation and precipitation on the biochemically-treated wastewater to discharge, and concentrating, dewatering and drying precipitate. The wastewater discharged by using the method reaches The people's Republic of China national standard of sewage comprehensive discharge standard (third-level discharge standard); through two-stage hydrolysis acidification-IC anaerobic reaction treatment, the gross removing rate of CODcr (chemical oxygen demand) can reach more than 92%, and carbon source does not needed to be supplied in the midway of the reaction, so that the normal running of equipment can be guaranteed.
本发明公开了一种餐厨垃圾二次废水的处理方法,是通过以下的步骤实现的:(1)将餐厨废水进行物化预处理,去除废水中的漂浮物、动植物油、油脂及SS;(2)将废水经过两级水解酸化-IC厌氧反应处理和好氧生物流离床的生化处理;(3)生化处理后的废水经絮凝沉淀进行排放,沉淀物进行浓缩、脱水干化。本发明排放的废水达到《中华人民共和国国家标准污水综合排放标准》(三级排放标准),并且通过两级水解酸化-IC厌氧反应处理,CODcr总去除率可以达到92%以上,且中途无需进行碳源补给,保证设备正常运行。

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