Slaughterhouse Wastewater Treatment Process

I. Background Introduction of Slaughterhouse Wastewater Treatment Equipment

As the economy continues to grow and the population expands, especially in the era of China's rapid economic development, the pain caused by environmental pollution has led people to increasingly recognize the importance of the environment and place a greater emphasis on environmental protection. Consequently, the wastewater emissions from previously less-regarded small and medium-sized slaughterhouses are now being gradually prioritized by the state. Some regions have already started to require small-scale slaughterhouses to begin treating their wastewater emissions. In this context, treatment equipment for small and medium-sized slaughterhouses has emerged accordingly. Our company, combining advanced treatment technologies from both domestic and international sources, has researched and compared comprehensive treatment processes for wastewater of different concentrations, integrating them into a single system. We have manufactured a set of integrated wastewater treatment equipment suitable for small to medium water volumes for slaughterhouses—the SQWSZ integrated slaughterhouse wastewater treatment equipment.

Section II: Application Scope of Slaughterhouse Wastewater Treatment Equipment

Suitable for small and medium-sized poultry, pork, duck, beef, and mutton slaughtering and processing plants.

Section 3: Basic Principles of Slaughterhouse Wastewater Treatment Equipment

Our SQWSZ integrated slaughterhouse wastewater treatment equipment is designed to address the specific water quality characteristics of slaughterhouse wastewater. It utilizes the activated sludge process to purify the wastewater. The principle is to use anaerobic and aerobic bacteria to consume organic pollutants in the wastewater through their own life activities. Simultaneously, the microbial flocs formed destabilize and flocculate suspended and colloidal organic pollutants, adsorbing them onto the surface of the activated sludge, degrading the organic matter, and ultimately achieving the purification of wastewater.

Section 4: Slaughterhouse Wastewater Treatment Equipment Technology

The SQWSZ integrated wastewater treatment equipment, developed and manufactured, has the following basic structure: The main body of the equipment is composed of anti-corrosion components made of glass fiber or carbon steel; it is equipped with a water distribution system, an underwater aeration system, and sedimentation and disinfection systems. During wastewater treatment, the wastewater is pumped into the anaerobic pond through the water distribution pipes, where it rises evenly and comes into extensive contact with the anaerobic bacteria, aiming to remove part of the COD, decompose macromolecular substances, and remove ammonia nitrogen. Subsequently, the wastewater flows from the top of the unit into the aerobic pond, where the aeration machine underwater aerates and stirs the wastewater, allowing the incoming wastewater to quickly mix thoroughly with the existing mixed liquid, adapting to changes in incoming water quality to a great extent. Through the aeration system, the wastewater is uniformly mixed, simultaneously increasing the dissolved oxygen content, ensuring relatively uniform water quality across the pond, with similar quantities and characteristics of microorganisms. This maintains nearly consistent working conditions across the aeration zone, controlling the entire biochemical reaction under favorable uniform conditions. Organic matter is gradually degraded by microorganisms, resulting in the purification of wastewater. After purification, the wastewater is separated from the sludge in the sedimentation pond and then disinfected in the disinfection pond for further treatment, ultimately achieving compliant discharge standards.

High purification efficiency: COD removal rate is 85% to 90%, and ammonia nitrogen removal rate is about 95%. The effluent meets the emission standards of the national "Emission Standards for Water Pollutants from Meat Processing Industry" (GB 13457-92) and is in compliance with the standard discharge.

V. Process Features of Slaughterhouse Wastewater Treatment Equipment

1. The SQWSZ integrated equipment developed and produced utilizes a biological contact oxidation treatment process, which is smaller in volume than the activated sludge pool, highly adaptable to water quality, excellent in withstanding shock loads, and ensures stable effluent water quality without causing sludge expansion.

2. The filling material has a high specific surface area, making it easy for microorganisms to adhere and shed their biofilm. Under the same organic load conditions, it achieves a high removal rate of organic matter, is stable and reliable, and does not require the addition of chemicals, saving subsequent costs and reducing operating expenses.

3. Hydrolysis and acidification can effectively treat colored wastewater, decompose large-molecule organic matter, reduce the burden on subsequent treatment, and save investment.

4. Ideal sedimentation effect, resulting in better water quality of the effluent.

5. Disinfection processing, achieving a removal rate of over 99.4%;

6. Properly manage the remaining sludge to ensure stable and reliable system operation, facilitate sludge discharge, and minimize manual operations.

7. Utilizes a unique construction method to significantly reduce odor dispersion.

8. Simple operation and management, allowing for adjustments in operating status based on actual conditions to achieve optimal performance.

9. High purification efficiency with BOD removal rate of 85% to 90%, effluent meets national level II or I discharge standards.

10. Capable of treating slaughterhouse wastewater and similar industrial organic wastewater.

Six: Advantages of slaughterhouse wastewater treatment equipment

1. The SQWSZ integrated wastewater treatment equipment, developed and manufactured, is either treated with carbon steel anti-corrosion or constructed with stainless steel components, assembled on-site, lightweight, easy to transport, and convenient to install.

2. Constructed with glass fiber reinforced plastic, carbon steel, and stainless steel corrosion-resistant materials, featuring excellent anti-corrosion and aging resistance, with a service life of over 30 years.

3. Situated below ground level, the surface above the equipment can be used for landscaping or other purposes without the need for construction or heating/insulation. This approach maximizes system integration and minimizes land area requirement.

4. Pollution-free, noise-free, odor-free, reducing secondary pollution.

5. Unlimited by wastewater volume, versatile and flexible; can be used individually or in combination with multiple units.

6. Targeted for effective removal of organic matter and ammonia nitrogen from wastewater.

7. The entire equipment processing system is equipped with an automatic electrical control system and a device fault alarm system, ensuring safe and reliable operation. Generally, no dedicated personnel management is required; routine maintenance and care of the equipment are sufficient, with low management costs.

8. A significant feature is the ability to integrate wastewater treatment into landscaping. The integrated equipment buried underground not only ensures excellent effluent quality but also achieves a ground cover greenery rate of over 90%. By using special cold-resistant, water-loving species or lawns, a water treatment landscape featuring streams, fountains, ponds, and fish ponds can be created, transforming polluted water into clear springs. This approach not only treats wastewater but also beautifies the environment, fulfilling people's desire to live by the mountains and beside the water.