The wastewater from the slaughter and meat processing industry has the typical characteristics of high pollution load, heavy oil content, complex blood pollution components, strong odor, and difficult biochemical treatment. It is a typical high-concentration organic wastewater:
The organic pollution is extremely high: COD is usually 3,000-12,000mg/L, BOD₅ is 1,500-6,000mg/L, which is more than 10 times higher than domestic sewage.
Contains a lot of oil and protein: fat, oil, and animal protein are very easy to form scum or emulsified state in water, and FOG (oil content) is often 100-500mg/L, causing equipment scaling and subsequent treatment system blockage.
Rich in blood and solid impurities: Contains a large amount of blood, hair, minced meat, bone fragments, feces, visceral residues, etc., SS (suspended solids) concentration is as high as 1,000-3,000mg/L, strong odor and high adhesion.
High nitrogen and phosphorus concentrations, easy to cause eutrophication: ammonia nitrogen can reach 200-600mg/L, total phosphorus is as high as 30mg/L or more. If not properly handled, it is very easy to pollute the water body and breed algae.
Strong intermittent discharge and large water volume fluctuations: Production is concentrated, drainage is often concentrated in the daytime operation period, and the peak and valley fluctuations of water volume can exceed 3 times.
using grid + inclined screen + efficient flotation + automatic oil scraping device to remove feces, hair, minced meat and emulsified oil at one time, and the COD removal rate in the pretreatment stage can reach 40-60%, which reduces the burden on biochemical treatment.
equipped with UASB anaerobic + AO/A2O aerobic + MBR membrane reactor and other combined processes to cope with high organic load and high nitrogen water quality, the effluent COD is stable ≤50mg/L, ammonia nitrogen ≤10mg/L, total phosphorus ≤0.5mg/L, easily meeting national and local emission standards.
The system is equipped with biological deodorization/chemical spray deodorization devices to effectively solve the odor problem in workshops and sewage stations; it is equipped with an intelligent dosing system to achieve unmanned operation, automatic control, and remote monitoring, reducing operating costs by 20%.
The biogas produced by the anaerobic system can be used for heat recovery in the plant area, and the dehydrated sludge can be used as organic fertilizer raw materials; the effluent can be used for non-contact cleaning and greening irrigation, realizing the green closed loop of "water resource reuse and on-site energy conversion".
General contracting
3,000 tons/day (slaughterhouse, meat processing wastewater) physical and chemical process + biochemical process
◎ 2025 Beijing Bianhuadian Chemical Analytical Instruments Co., Ltd.. All Rights Reserved.
