Slaughtering Wastewater

Slaughtering wastewater comes from fence washing, washing, slaughtering and other plant floor washing, scalding, dissection, non-staple food processing, animal residue, blood water, etc.

Slaughtering Wastewater Features

Slaughtering wastewater is a typical organic wastewater, which mainly contains blood, fat, broken meat, bone residue, animal hair and feces. The wastewater is maroon and has a strong odor. It is rich in protein and oil, free of heavy metals and toxic substances, and the main nutrients are nitrogen and phosphorus. It belongs to high nitrogen and high phosphorus organic wastewater. Among them, nitrogen mainly exists in the form of organic matter or ammonium salt (NH4+), while phosphorus mainly exists in the form of phosphate (PO43 -).

Slaughtering Wastewater Treatment Process Selection

The slaughterhouse wastewater treatment process is pre-treatment (Regulation, grid, Air Floatation Machine, etc.).

The daily water volume is regulated by the Regulation Tank to make the neutralization and fusion of entering the biochemical tank.

The Grid is mainly used to intercept and remove some large particles such as hair and visceral residue, which has certain effect on reducing suspended solids.

The Air Flotation Machine is mainly used to remove some fine suspended solids, grease and lipids in the water. At the same time, the air flotation machine also has a certain removal efficiency of COD, improving the biochemical pool of wastewater.

Biological Treatment Process

Biological treatment process is a wastewater treatment method that uses microorganisms to remove organics and pathogens from slaughterhouse wastewater. Its BOD removal rate can reach 90%, which is one of the most economical and effective treatment methods.

Biological treatment technologies mainly include anaerobic process, aerobic process and constructed wetlands (CWs). Among them, the common anaerobic processes include anaerobic baffled reactor (ABR), anaerobic filter (AF), anaerobic pond (AL), stabilization pond (SP), upflow anaerobic sludge bed reactor (UASB), anaerobic sequencing batch reactor (SBR), etc. The common aerobic processes include activated sludge process (AS), biological contact oxidation (BCO), aerobic SBR, etc.

Combined Process

Biological/physical-biological combined processes include BCO-coagulation sedimentation, integrated anaerobic-aerobic fixed membrane reactor, ABR-circulating activated sludge system (CASS), ABR-AF, ABR-secondary BCO, hydrolytic acidification-CAS, anaerobic-anoxic-aerobic baffled bioreactor, hydrolytic acidification-two-stage SBR, etc.

For combined process, there are mainly two feasible operation modes:

The anaerobic process is pre-positioned and the aerobic process is post-positioned, forming a virtuous closed cycle of aerobic nitrification/phosphorus absorption+anaerobic denitrification through reflux to achieve the purpose of nitrogen and phosphorus removal.

An integrated device is formed to realize the effective circulation of anaerobic-aerobic environment in the same reactor.

There are 12 kinds of typical wastewater sewage water, including:

1. Starch Processing Wastewater
2. Juice Processing Wastewater
3. Hospital Wastewater Sewage Water
4. Dairy/Milk Processing Wastewater
5. Beer Processing Wastewater
6. Papermaking Processing Wastewater
7. Slaughtering Wastewater
8. Pickle Processing Wastewater
9. Monosodium Glutamate Processing Wastewater
10. Beverage Processing Wastewater
11. Saponin Processing Wastewater
12. Community Domestic Sewage Water

Slaughtering wastewater has a high content of organic suspended solids and is easy to decay. Discharge into the water body will consume dissolved oxygen in the water, destroy the ecosystem and pollute the environment.

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