Livestock wastewater treatment

Livestock waste water is a source of wastewater containing many organic compounds, viruses, germs and helminth eggs. This water source is likely to pollute the surface and groundwater layers and become the cause. Direct disease outbreaks for herds. At the same time it can spread some diseases to humans and affect the surrounding environment because livestock waste also contains many organisms such as Samonella, Leptospira, Clostridium tetani, ... if not handled in time. In addition, many gases are produced by microbial activity such as NH3, CO2, CH4, H2S, etc. These gases can cause air pollution and groundwater to affect the child's life. people and ecosystems.

  1. Source of livestock waste water:
  • Sewage sanitation facilities: wastewater disinfection, urine and animal manure
  1. Composition of animal wastewater:

Livestock waste water is one of the very typical types of wastewater that can cause high levels of environmental pollution by organic matter, suspended solids, N, P and pathogenic organisms. Before disposal into the environment.

  • Organic and inorganic substances

In animal wastewater, organic compounds account for 70-80% of cellulose, protit, amino acid, fat, hidratcarbon and their derivatives in manure, food waste. Most biodegradable organic substances. Inorganic substances account for 20-30% of sand, earth, salt, urea, ammonium, chloride, SO42-,…

  • N and P

Ability to absorb N and P of cattle and poultry species is very poor, so when they eat food containing N and P, they will excrete in faeces and urine. In pig waste water generally contains high N and P content. N-total content in animal wastewater 571 - 1026 mg / l, Phosphorus from 39 to 94 mg / l.

  • Pathogenic microorganisms

Livestock wastewater contains a variety of germs, viruses, and parasites.

Major pollutants in pig waste water

Typical contaminants

Content

pH

7,1 – 8,2

BOD5 (mg/1)

1650 - 3300

COD (mg/1)

2500 - 5000

SS (mg/1)

1800- 3200

N-NH4+(mg/1)

10-60

N total

520-620

P total

14,3-64

Coliform total (MNP/100ml)

106– 109

  1. Diagram of wastewater treatment for pigs:
  2. Demonstration of the technology chart

    Wastewater is passed through the screen to eliminate large pieces of garbage, waste from this is collected and taken to burial. The wastewater is then placed in the receiving compartment and then through the settling tank. At this point, the amount of sand present in the waste water will be deposited and leveled. The water from the settling tank continues through the regulating tank to stabilize the flow and concentration of pollutants. The sedimentation tank to sediment tank I has the form of centrifugal sedimentation tank to remove some sedimentation organic matter. The sludge collected here is pumped into the sludge compacted tank. Waste water continues through the UASB tank. In the UASB tank, the suspended anaerobic organisms dissolve the organic matter in the wastewater into simple inorganic substances and CO2, CH4, H2S. In the UASB tank there are three-phase separators: gas, waste water and sludge. Wastewater is separated from the sludge and gas into the Aerotank. Here the process of aerobic decomposition of organic compounds. The tank is continuously blown to maintain aerobic conditions for microorganisms to grow. The wastewater is then discharged into the sedimentation tank II, where wastewater and activated sludge are separated. Activated sludge settles to the bottom, the wastewater at the top is led through the lagoon. Wastewater before the lagoon is chemical antiseptic to kill harmful microorganisms.
  3. Contact:
    Hotline: 0903983932                          Email: [email protected]

 

Share:
Liên hệ với chúng tôi ngay!