Garbage disposal in dumpsters or sewers is insufficient. To avoid water contamination and maintain a healthy ecosystem, we must ensure that wastes disposed off in sewage are cleansed before being dumped. Sewage treatment in Bangladesh is a must in order to ensure pure and safe drinking water to its people.

What is a Sewage Treatment?

Sewage treatment is a form of wastewater treatment that removes impurities from sewage to generate an effluent that can be discharged to the environment or reused, preventing water pollution from raw sewage discharges.

The main goal of wastewater treatment is to make it possible to dispose of human and industrial effluents without endangering human health or causing unacceptable environmental harm.

Types of sewage treatment

The sewage treatment system is divided into three stages: primary, secondary, and tertiary water treatment.

• Primary Treatment

Water is briefly stored in a settling tank during primary treatment, when denser solids sink to the bottom and lighter solids float to the surface.

These components are held back until they have settled, while the remaining liquid is discharged or moved to the more stringent secondary phase of wastewater treatment.

Mechanical scrapers in the tank’s base continuously drive collected sludge to a hopper, where it is pumped to sludge treatment facilities.

• Secondary Treatment

Secondary wastewater treatment is designed to significantly degrade the biological content of the sewage through aerobic biological processes, and it acts at a deeper level than primary treatment.

Secondary wastewater treatment reduces common biodegradable contaminants to tolerable levels, allowing for safer release into the surrounding ecosystem.

It can be accomplished in one of three ways:

• Biofiltration

Sand filters, contact filters, and grit removal are used in biofiltration to guarantee that any further sediment is removed from the effluent.

• Aeration

Aeration is a long drawn out process that introduces air to wastewater to improve oxygen saturation. The aeration process is very effective but can take up to 30 hours to complete.

• Oxidation ponds

This approach, which is most commonly employed in warmer areas, uses natural bodies of water such as lagoons to enable wastewater to run through for a specific length of time before being held for two to three weeks.

• Tertiary Treatment

The goal of tertiary sewage treatment is to improve the water’s quality to meet domestic and industrial standards, as well as to meet specific requirements for water discharge safety. In the case of municipally treated water, tertiary treatment also includes the elimination of pathogens, ensuring that the water is safe to consume.

We specialize in industrial tertiary and quaternary sewage treatment at ABM Water Company, with our specialized solution focusing on the most difficult-to-treat pollutants to ensure that criteria for safe discharge or reuse of water are achieved.

How many sewage treatment plants are there in Bangladesh?

Unfortunately there is only one sewage treatment plant in Bangladesh which is absolutely insufficient. Bangladesh is a very big country and it should have at least 10 sewage treatment plants in order to ensure pure drinking water for the citizens of this country. Because drinking contaminated water can induce acute gastrointestinal sickness in newborns and children, which can lead to a high fatality rate.

Importance of Sewage Water Treatment in Bangladesh

Sewage is made up of domestic and commercial wastewater, as well as perhaps pre-treated industrial waste. There are a variety of sewage treatment methods to choose from. Sewage treatment is a sort of wastewater treatment that eliminates contaminants from sewage to generate an output that is safe to dump or reuse, preventing water pollution from raw sewage discharges.

The overall purpose of sewage treatment is to produce effluent that can be discharged into the environment with little water contamination or that may be reused in a useful manner. These plants are generally used by municipalities to treat residential wastewater. Residential wastewater frequently contains human or animal excreta, as well as food items. Because they deal with organic waste, these facilities require less water filtration operations. Without sufficient sewage treatment, unpleasant odors, sewer overflow, and other problems will make our life difficult.

Waste management that is done correctly can result in the availability of valuable materials that can be reused. It reduces the quantity of garbage that needs to be disposed of, saves landfill space, and conserves natural resources. Finally, proper waste management is critical for public health.

Sewage treatment systems remove hazardous organisms and eliminate disease-causing microorganisms. Before the wastewater leaves the tank and enters the ground, it is filtered to remove such impurities. This filtration technique keeps pathogens out of water sources and away from plants and agricultural animals.

Bangladesh’s objective behind Sewage Water Treatment

The goal of Bangladesh sewage water treatment is to remove pollutants, remove toxicants, neutralize coarse particles, and kill pathogens so that the quality of released water meets the acceptable level for discharge into water bodies or agricultural land.

Waste removal that is done correctly helps to enhance air and water quality while also lowering greenhouse gas emissions. It aids in the reduction of resource extraction as well as pollution and energy consumption connected with the production of new materials.

Through sewage treatment plant odors from the sewage can be kept at minimum and diseases free environment can be ensured.

Thus, Bangladesh sewage water treatment  tries to reduce BOD, COD, eutrophication, and other contaminants in receiving water bodies while also preventing bio-magnification of hazardous compounds in the food chain. It ensures pure and safe drinking water.