Methods of Water Pollution Control in Slaughterhouses

Abstract

The invention provides a method for controlling water pollution in a slaughterhouse. The method comprises the following steps: wastewater treated by an oil separating pond is discharged into a sewagetreatment pond, the sewage is treated firstly through an adsorption impurity-removing method to obtain a primary filtrate, the primary filtrate is introduced into an active sand filter for filtering and removing impurities to obtain a secondary filtrate, the secondary filtrate is discharged into a multi-stage ecology-imitating oxidation ditch for treatment to obtain a tertiary filtrate, and finally the tertiary filtrate is introduced into a multi-stage artificial geological rapid infiltration system to make water reach a discharge standard. The method provided by the invention has high sewagetreatment efficiency, and the regenerated and reduced sewage can be recycled; an appropriate amount of an additive is added into a grease hydrolysis pond, and the additive can increase a dissolved oxygen amount in the grease hydrolysis pond and prevents the dissolved oxygen in a grease barrier atmosphere from entering a water body; and the additive has a porous structure and provides a good growthenvironment for microorganisms, can reduce microbial hypoxia death caused by wrapping of oil, and greatly improves a degradation rate of grease.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for controlling water pollution in slaughterhouses. Background technique [0002] Slaughtering industry is one of the pillar industries for earning foreign exchange through export and ensuring supply in my country. Slaughtering wastewater comes from livestock, poultry, and fish slaughtering and processing, and is one of the largest sources of organic pollution in my country. According to the survey, the discharge of slaughtering wastewater accounts for about 6% of the national industrial wastewater discharge. With the development of the economy and the improvement of people's living standards, the meat food processing industry will have greater development. The pollution of slaughtering wastewater is still high. growing trend. Slaughter wastewater is reddish brown, has a fishy smell, and contains a lot of grease, blood, fur, broken bones, hoof horns and internal organs. COD...

AI Technical Summary

Problems solved by technology

[0003] Slaughter wastewater contains a lot of oil, and oil will block the dissolved oxygen in the atmosphere from entering the water body. During the treatment process, the oil will also wrap around the microorganisms, causing them to die due to lack of oxygen, which will affect the treatment effect.