What is the role of MBBR sewage treatment plant?

MBBR sewage treatment plant has the following important functions:
1. Removal of pollutants
Removal of organic matter:
It can effectively remove organic pollutants in sewage, such as carbohydrates, proteins, fats, etc. Organic matter is adsorbed, absorbed and biodegraded through the biofilm formed by microorganisms on the surface of the filler.
The organic matter in the sewage is decomposed into harmless substances such as carbon dioxide, water and microbial cell substances, thereby reducing the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) of the sewage.
Denitrification and phosphorus removal:
During the MBBR sewage treatment process, denitrification and phosphorus removal are achieved through specific microbial communities. For example, nitrifying bacteria convert ammonia nitrogen into nitrite and nitrate, and denitrifying bacteria reduce nitrate to nitrogen gas under anoxic conditions, thereby removing nitrogen pollutants from sewage.
At the same time, polyphosphate bacteria absorb phosphorus in sewage under aerobic conditions and release phosphorus under anaerobic conditions, achieving the purpose of phosphorus removal through sludge discharge.
Removal of suspended solids:
Although the MBBR process is not mainly aimed at the removal of suspended solids, the interception and sedimentation of the filler and the subsequent sedimentation unit can remove a certain amount of suspended solids during the treatment process.
This helps to improve the water quality of the effluent and reduce pollution to the environment.

2. Protect the water environment
Prevent eutrophication of water bodies:
By removing nutrients such as nitrogen and phosphorus from sewage, MBBR sewage treatment plants can effectively prevent eutrophication of water bodies. Eutrophication of water bodies can lead to the massive reproduction of algae, destroy the balance of the aquatic ecosystem, and affect water quality and the survival of aquatic organisms.
Reducing the discharge of nitrogen and phosphorus is essential for protecting natural water bodies such as rivers and lakes.
Reducing water pollution:
Treatment of sewage before discharge can greatly reduce the pollution of sewage to the environment. Untreated sewage contains a large amount of harmful substances, such as heavy metals, organic matter, pathogens, etc., which can cause serious pollution to soil, groundwater and surface water.
MBBR sewage treatment plants can effectively remove these pollutants and reduce the risk of water pollution.
Maintaining ecological balance:
The treated sewage can be used for irrigation, landscape water, etc., providing a certain amount of water resources for the ecosystem. This helps maintain ecological balance and promotes plant growth and the reproduction of aquatic organisms.
At the same time, reducing sewage discharge can also protect the habitat of aquatic organisms and maintain biodiversity.

3. Resource recycling
Energy recovery:
In some MBBR sewage treatment plants, anaerobic digestion and other technologies can be used to treat sludge and produce energy such as biogas. Biogas can be used for power generation or heating to achieve energy recycling.
This can not only reduce the operating cost of sewage treatment plants, but also reduce dependence on traditional energy.
Water resource reuse:
The effluent after deep treatment can meet certain water quality standards and be used for industrial water, agricultural irrigation, urban miscellaneous use, etc. This can alleviate the pressure of water shortage and realize the recycling of water resources.
For example, the treated reclaimed water can be used for cooling circulating water in factories, urban greening irrigation, etc.

4. Promote sustainable development
Reduce environmental pressure:
The construction and operation of MBBR sewage treatment plants can reduce the negative impact of sewage on the environment and reduce the cost of environmental governance. This helps to achieve the coordinated development of economy, society and environment.
At the same time, by reducing water pollution, people's quality of life and health level can also be improved.
Promote the development of environmental protection industry:
The application of MBBR technology has driven the development of environmental protection industry, including sewage treatment equipment manufacturing, engineering design and construction, operation management and other fields. This has created employment opportunities for the society and promoted economic development.
The continuous innovation and improvement of MBBR technology has also provided impetus for the sustainable development of environmental protection industry.

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