Industry cases - Industrial wastewater treatment and reuse

—— A pollution-stricken area with "high concentration, high ammonia nitrogen, and high odor"

Livestock husbandry wastewater is known as "one of the industrial wastewaters with the highest pollution load", with significant characteristics such as high concentration, strong odor, high nitrogen and phosphorus content, and high difficulty in biochemical treatment**:
High organic pollution concentration: COD is usually 3,000-12,000 mg/L, BOD₅ can reach 1,500-6,000 mg/L, which is more than 10 times that of urban domestic sewage; untreated discharge will quickly deplete the dissolved oxygen in the water and cause the death of fish and shrimp in the natural water body.
Extremely high ammonia nitrogen and phosphorus content: ammonia nitrogen is often 200-800 mg/L, total phosphorus is 20-80 mg/L, which is very easy to cause environmental disasters such as eutrophication of water bodies and blue algae outbreaks.
Contains a large amount of suspended matter and feces: SS is as high as 2,000 mg/L or more. Impurities such as feces, feed residues, and animal hair are not easy to settle, and pretreatment is required before treatment.
Strong odor and many pathogens: The wastewater contains a large amount of volatile organic matter (such as ammonia, hydrogen sulfide) and bacterial pathogens. If improperly treated, it is easy to cause odor pollution and public health risks in the surrounding environment.
Large fluctuations in water volume and strong intermittent discharge: The drainage of slaughtering, washing, feeding and other links is uneven, and the daily water volume fluctuation range often reaches more than 50%.