MBBR is highly capable of treating nitrogen, which conventional tanks are not.

This was one of the most outstanding technologies introduced at the healthcare technology and equipment trade fair organized by CESTI (Center for Science and Technology Information) some days ago.

MBBR is an artificial treatment process, using substratum, or carrier that provides a surface for bioorganisms to grow, and helps treat waste water.

Waste water from hospitals and health care facilities, especially waste water from X-ray printing, liquid radioactive substances, and medical waste, are very hazardous as they contain toxic substances and highly pathogenic bacteria.

If not thoroughly treated before being discharged to the environment, the waste water will cause imbalance to the ecosystem in the water source and seriously affect human health, spreading pollution.

The pollutants in waste water will not only have direct impact on lake and river water, but also absorb into the earth and pollute underground water. Waste water containing pathogenic bacteria can lead to disease in humans and animals through water and irrigated vegetables.

Many medical waste water treatments are being used at hospitals. Of these, MBBR which improves reliability and simplifies operation, requires less space than traditional wastewater treatment systems.

MBBR technology uses aerobic microorganisms which can dissolve organic compounds. These microorganisms adhere to the surface of the substratum put on biological tanks and "clean" the waste water.

The microorganisms on the surface of filter materials consist of three types: the outer layer consists of aerobic microorganisms, followed by anoxic, and the inner layer is anaerobic microorganisms.

On the surface of substratum, microorganisms grow and create a microbial mud layer. On the innermost layer of the substratum, the anaerobic microorganisms develop vigorously and treat high molecular organic compounds. 

On the outermost layer, the anoxic microorganisms will turn nitrate into nitrogen which will escape the waste water environment.

Once contaminated components are removed, aerobic microbial mud will be split from the waste water in sedimentation tank. 

The sludge in the sedimentation tank will be pumped to anoxic biotank to maintain the amount of sludge in the tank and reduce the amount of nitrate left.

The material for substratum needs to be lighter than water so as to stay suspended in the tank. These substratum constantly move throughout the tank thanks to air blowers and stirrers, which increases the microbial density.

According to the Dai Nam Environment Solution Co Ltd, the provider of the solution, the technology is 1.5-2 times more effective than conventional aerobic biological tank.

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