Slaughterhouse wastewater treatment targets high levels of organic matter, oil, and pathogens, and the following agents are used:
1. Flocculants: Cationic polyacrylamide (PAM) absorbs negatively charged proteins and oils in wastewater. Combined with polyaluminum chloride (PAC), it can enhance floc strength and achieve turbidity removal rates exceeding 80%.
2. Bio-infectants: Bacillus complexes and nitrifying bacteria accelerate the decomposition of organic matter, reducing COD and ammonia nitrogen. Ammonia nitrogen removal rates of 60%-90% can be achieved after addition. Nitrogen and phosphorus nutrients are required to balance microbial metabolism.
3. Adsorption Decolorizers: Activated carbon absorbs pigments, odors, and heavy metals, achieving deep treatment to reduce color by 50 times. High-molecular-weight decolorizers target stubborn colorants, such as hemoglobin, with a decolorization rate of 70%-90%.
4. Disinfectants and Conditioners: Sodium hypochlorite kills pathogens and ensures that fecal coliform bacteria meet standards. Sodium hydroxide adjusts acidic wastewater to neutral, facilitating biochemical reactions.
5. Demulsifiers and Defoamers: Cationic demulsifiers separate oil and fat, while defoamers eliminate foam in the aeration tank, ensuring a smooth treatment process.
The dosage of these agents should be adjusted dynamically based on water quality to ensure efficient treatment while preventing secondary contamination.
