We Charm Ltd. is a leading manufacturer and supplier of Packaged STP Plant and MBR Sewage Treatment Plant in Bangladesh. Our mission is to ensure the protection of the environment and public health by providing reliable and efficient sewage treatment services.
With 10 years of experience and a team of highly skilled professionals, we have established ourselves as a trusted name in the industry. We use advanced technology and processes to deliver effective and sustainable solutions that meet the needs of our clients.
A sewage treatment plant is a facility designed to treat and purify wastewater and sewage from residential, industrial, and commercial sources. Its primary purpose is to remove contaminants, pollutants, and harmful microorganisms from the sewage to make it safe for discharge into the environment or for reuse.
Water is absolutely necessary for the survival of all living things and is one of the most essential sources of economic activities as well. However, the world is currently facing a serious water problem due to population growth and economic development.
One of the major water problems is pollution. In areas where sewerage and Johkasou (STP) are not widely covered, human waste and miscellaneous wastewater are discharged directly into rivers and the ocean. If this continues, water will remain contaminated.
“Johkasou(STP)”can contribute to the solution of these problems.
Johkasou is a facility that treat human-waste (water from toilets) and miscellaneous wastewater (water from kitchens, bathrooms and laundry machines, etc) and discharges them into reivers other than public sewers.It decomposes and filters various substances, and treats dirty water properly and returns it to nature.
Separate solids in wastewater by gravity and prevent the agitation of the excess sludge in Sedimentation & Separation Chamber by influent.
Separate solid debris or impurities from water in influent and circulated water and store these sediments in the chamber. Accumulated sludge should be desludged from the tank periodically at least once in 6 – 12 month.
It is filled with filter materials, which separate solids and keep anaerobic microorganisms to decompose organic matter.
It is filled with mesh cylindrical media, which retain aerobic microorganisms to decompose and remove organic matter from wastewater.
In order to obtain clear treated water, separate the excess sludge (suspended solids, SS) by gravity. The settled sludge is constantly returned to the sedimentation & separation chamber by the airlift pump.
Disinfect the treated water to discharge to the river or other water bodies.
Explore the Johkasou water treatment system through a clear visual overview. This guide illustrates each stage of the process—from household wastewater input to clean water output—highlighting how Johkasou units efficiently treat and recycle water in environmentally friendly ways.
A membrane-type sewage treatment plant is a modern wastewater treatment system that utilizes membrane filtration technology to remove contaminants from sewage. Semipermeable membranes filter out suspended solids, organic matter, and pathogens, ensuring high-quality effluent.
Sewage first undergoes screening to remove larger particles. It is then filtered through membranes with microscopic pores that trap contaminants and suspended solids. The filtered water is subsequently disinfected using UV radiation or chemicals before being safely released into the environment. Membrane-type plants are ideal for areas with limited resources and are widely used in industries such as food processing, pharmaceuticals, and electronics manufacturing for effective wastewater treatment.
Here’s why we are the trusted choice for sewage treatment solutions: