Method for flocculating and precipitating food waste wastewater with biological bacteria

Abstract

The invention relates to the field of environmental protection water treatment, in particular to a method for flocculating precipitation of kitchen garbage wastewater with biological bacteria. The steps include: preparing a biological bacterial liquid, which is mainly based on yeast flora including lactic acid bacteria and spore bacteria; firstly removing animal and vegetable oil and large particle mixture from high concentration organic kitchen garbage wastewater to obtain emulsus wastewater of kitchen garbage containing suspended matters; adding the biological bacterial liquid into the emulsus wastewater and conducting stirring; storing the biological bacterial liquid added wastewater into a sedimentation tank to stay, with the stay time and the bacteria adding amount being directly proportional; pumping the supernate in the wastewater from flocculating precipitation into a water treatment technological process to conduct treatment, performing up-to-standard emission, and letting the flocculating precipitation liquid enter a recycling process. According to the invention, the biological bacteria have the characteristics of low cost, no side effect and no pollution. The biological bacteria and the anaerobic bacteria and aerobic bacteria in the water treatment process have mutual assistance effect and no repellent effect. After flocculating precipitation, the supernate effectively lowers the COD value, and the flocculating precipitation liquid has utilization value.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular to a method for flocculating and precipitating kitchen waste wastewater with biological bacteria. Background technique [0002] Kitchen waste is the waste generated in people's daily life. A large amount of high-concentration organic wastewater is generated during centralized treatment. It is mainly composed of a large amount of organic matter, rich in starch, cellulose, protein, lipids, and inorganic salts. , the COD value in water is as high as ten to two hundred thousand milligrams per liter. For such sewage, the existing sewage treatment technology is difficult to realize or requires super-large equipment, because the food waste treatment industry has only started in recent years. However, there is no precedent for reference to water treatment technology. The key point is how to reduce the COD value of the water inlet so that it can reach the bearing capac...

AI Technical Summary

Problems solved by technology

It has been reported that flocculants using EM bacteria in sewage treatment in foreign countries are effective, but they have not been popularized and are in the experimental stage.