Pig farm wastewater treatment equipment

1aquaculture wastewaterPollution and water quality characteristics

The main sources of wastewater in livestock farms are flushing water from livestock and poultry houses, dripping drinking water, cooling water, and domestic wastewater from livestock farms. The amount of flushing water depends on the manure cleaning process, and the amount of flushing water varies greatly among different manure cleaning processes, resulting in significant differences in the amount of aquaculture wastewater.

(1) The main source of wastewater in breeding farms comes from poultry farming, including land poultry such as chickens and pigeons, as well as waterfowl such as ducks and geese. The main pollutants are solid waste, including feathers, hatching waste (eggs and eggshells), and waste from bedding in pens.

(2) The sewage from livestock farms mainly comes from animal husbandry, including pigs, cows, sheep, horses, camels, etc. The feces in the pollutants have been utilized, and the rest are mostly liquid wastewater. The characteristics are that the amount of feces and urine discharged and the amount of water used for washing the pens are large, and the odor is strong, which can easily lead to the deterioration of the environment in the pens.

(3) The wastewater from aquaculture mainly comes from aquaculture, including fish, shrimp, crabs, shellfish, etc. The pollution sources mainly come from the excrement of aquaculture organisms and residual feed, most of which exist in the form of suspended large particles. The high content of ammonia nitrogen and organic matter in aquaculture wastewater can lead to eutrophication when discharged into water bodies, disrupt the ecological balance of the water environment, and result in the degradation or even loss of the self purification function of water bodies.

The main pollutants in aquaculture wastewater include ammonia nitrogen, nitrite, organic pollutants, phosphorus, and fouling organisms. Livestock breeding wastewater has typical "three highs" characteristics, namely high organic matter concentration, COD 3000-12000mg/l, ammonia nitrogen up to 800-2200mg/l, suspended solids exceeding SS by dozens of times, deep color, and containing a large number of bacteria. It also has high ammonia nitrogen and organic phosphorus content. Good biodegradability, concentrated flushing and discharge time, and high impact load. According to the characteristics of water quality, suspended solids and chromaticity are removed first, and coagulation sedimentation process is adopted. Organic matter, ammonia nitrogen, and organic phosphorus are treated by biochemical treatment. Due to its high concentration, other processes or equipment may be used for auxiliary treatment.

IILivestock wastewater treatmentworkmanship

Livestock wastewater - grid - feces separator - regulating tank - UASB - SBR - sedimentation tank - disinfection tank - effluent

After coming out of the pig farm, the breeding wastewater flows through the grid and mesh, where most of the larger impurities are removed before entering the biogas digester. In the biogas digester, organic matter undergoes hydrolysis under anaerobic conditions, transforming from recalcitrant high molecular weight organic matter into easily biodegradable small molecular weight organic matter for subsequent processing.

After passing through the regulating tank, the aquaculture wastewater is pumped into the hydrolysis and acidification tank by a lift pump. The acidification and hydrolysis tank adopts a rising flow anaerobic sludge reaction bed form (UASB reaction tank). At the same time, the mixed solution returned from the contact oxidation tank is denitrified under the action of denitrifying bacteria, achieving the purpose of biological denitrification! The aquaculture wastewater enters the contact oxidation tank to further degrade organic matter and remove a large amount of phosphorus!

The solid-liquid separation of plant wastewater can remove 30% -40% of SS, 25% -30% of BOD5, up to 75% -85% of COD through UASB, and 85% -90% of COD, 82% -92% of BOD, and 95% -98% of ammonia nitrogen from aquaculture wastewater. After treatment, all aquaculture wastewater can meet the discharge standards!

IIILivestock wastewater treatment equipmentFeature and advantage

Process features: 1. Removing BOD before aerobic treatment, energy-saving; 2. Alkalinity is generated before nitrification; 3. Pre hypoxia has a selective pool effect; 4. The process is simple; 5. Short hydraulic retention time; 6. Good sludge settling performance; 7. Phosphorus accumulating bacteria have abundant carbon sources and good phosphorus removal effects.

Equipment advantages: 1. The integrated aquaculture wastewater treatment equipment is composed of one or more units connected and combined on site, with small volume, light weight, easy transportation, and convenient installation; 2. The anti-corrosion structure of glass fiber reinforced plastic, carbon steel and stainless steel is adopted, which has excellent characteristics such as corrosion resistance and aging resistance, with a service life of more than 20 years; 3. Save land, no need to build houses or provide heating and insulation. Maximized device integration and reduced footprint; 4. No pollution, no odor, reduce secondary pollution; 5. Not limited by the amount of sewage collected, flexible and adaptable, can be used individually or in combination with multiple. 6. The entire processing equipment is equipped with an automatic control unit and a fault alarm device, ensuring safe and reliable operation. Generally, there is no need for dedicated personnel to manage it, and only timely maintenance and upkeep of the equipment are required, resulting in low management costs.

4、 Livestock wastewater treatment equipment brings economic benefits to owners

1. Fully utilize idle social funds and reduce capital investment; 2. Effectively save building space and reduce land use costs; Relieve the pressure of municipal pipeline construction and reduce the scale of sewage pipeline network; 4. Save water resources and effectively achieve the reuse of reclaimed water; Highly integrated water treatment technology promotes innovation in the water treatment industry.