BA-2 Module For Waste Water Treatment By Daiki Axis BD

BA-2 Module (Cross Section Of Capsule Type Johkasou) For Waste Water Treatment By Daiki Axis Bangladesgh

What is BA 2 Module (Capsule Type STP)?

The BA-2 module or Capsule Type STP Module (a type of Johkasou), is a compact, energy-efficient Packaged-type wastewater treatment system. It is specially designed for domestic sewage and small-scale commercial use
Domestic wastewater comes from everyday activities like cooking, bathing, washing clothes, and handwashing. This type of wastewater contains pollutants such as BOD, Ammonia, TSS, TDS, Total Nitrogen (T-N), Total Phosphorus (T-P), and Coliform bacteria.
The Johkasou system uses advanced biological processes to safely and effectively treat this wastewater before it is discharged or reused.

BA-2 Module (without water)

BA-2 Module (with water)

How Does the Capsule Type Module Work?

The system follows a multi-stage treatment process, ensuring high-quality effluent

Sedimentation & Separation Chamber:

Sedimentation and separation chamber collects domestic waste water. It also has function to separate solid wastes from liquid waste based on their gravity.

Anaerobic Chamber:

Waste water then flows into anaerobic media contact chamber from sedimentation and separation chamber. It contains organic material which is decomposed by anaerobic microorganism
Anaerobic reaction shown as follow: Organic Material----> CH4 + NH3 + smaller materials + H2O NO2 + NO3--------->N2 + H2O

Moving Bed Chamber:

Anaerobic process treatment water flows into moving bed chamber. Organic material contained waste water is decomposed by aerobic microorganism, and becomes simpler product. In this case the organic waste material is used for development of new cells (protoplasm) and converted to other materials such as carbon dioxide, water, and ammonia.

Sedimentation Chamber:

Sedimentation chamber has function as place of settled sludge which is resulted by biological processes in moving bed chamber. Settled sludge will be transferred to sedimentation and separation chamber.

Disinfection Chamber:

Disinfectant chamber serves as a place to put chlorine/disinfectant as a sterilization agent pathogenic microorganisms in the waste processed before discharged into the environment.

Feature	Description
Treatment Capacity	1–15 m³/day (customizable based on need)
Power Requirement	Low (varies per model)
Material	FRP (Fiber Reinforced Plastic)
Installation	Above-ground, underground, rooftop, car parking area, Gardening Area
Effluent Quality	PH 6- 8.5 BOD ≤ 20 mg/L, TSS ≤ 30 mg/L, COD ≤ 50 mg/L, T-N ≤ 45 mg/L, Oil & Grease ≤ 10 mg/L

Why Choose the Capsule Type Module?

Applications of Capsule Type Johkasou Module

Individual houses

Small apartment buildings (e.g., 1–100 people)

Guesthouses or boutique resorts

Small restaurants or cafés

Remote schools or clinics with low footfall

Environmental Benefits

Why BA-2 is Perfect for Bangladesh?

The Johkasou system is a Japanese-origin onsite sewage treatment technology designed to treat domestic wastewater (both blackwater and greywater) at the source. The BA-2 is a specific model of this system tailored for small to medium-scale applications — such as individual homes, small buildings, or community clusters.The BA-2 Capsule Type STP Module (a type of Johkasou), is a compact, energy-efficient Packaged-type wastewater treatment system. It is specially designed for domestic sewage and small-scale commercial use.Domestic wastewater comes from everyday activities like cooking, bathing, washing clothes, and handwashing. This type of wastewater contains pollutants such as BOD, Ammonia, TSS, TDS, Total Nitrogen (T-N), Total Phosphorus (T-P), and Coliform bacteria.The Johkasou system uses advanced biological processes to safely and effectively treat this wastewater before it is discharged or reused.Its adaptability, simplicity, and effectiveness make it an excellent choice for countries like Bangladesh, where building large-scale centralized systems is often not feasible due to cost, terrain, and time constraints. By adopting this system, communities can achieve improved public health, environmental protection, and long-term sustainability.