Commercial johkasou supplier in Bangladesh

Roptan is a commercial johkasou supplier in Bangladesh for hotels, restaurants, hospitals and offices. Send the building plan, its uses and your outlet target: we source a unit sized to that load from a verified seller, check its process and deliver it to site.

Verified sellers
Checked before it ships
Delivered by Roptan

Prefer to deal with suppliers yourself? Post it on the requirement board

Buying commercial johkasou in Bangladesh

A commercial johkasou treats the toilet, kitchen and bath water of a hotel, restaurant, hospital or office in buried tanks, then disinfects it before discharge. Unlike a house unit, it is sized from floor area and building use, and a heavy kitchen can multiply the load. In Bangladesh it suits resorts, hospitals, canteens and offices with no sewer.

A commercial johkasou supplier in Bangladesh should match the process to your load and outlet target, not sell one model to every building. Roptan sources from verified sellers, checks the sizing per use, the process and its service needs, and compares installed prices. The seller commissions the unit; we arrange servicing with the seller or a local contractor.

Kinds of commercial johkasou

Hotel and resort units

Japan's table typically sizes hotels from floor area, with a higher count where there are wedding halls. Choose this route for hotels and resorts, and list every hall.

Restaurant and canteen units

Typically sized from floor area and pollutant load, so a busy kitchen counts far more than a quiet one. Choose it for restaurants, food courts and canteens, with fat pretreatment ahead.

Hospital and clinic units

Typically sized per bed, with a higher count where the hospital runs a kitchen or laundry on site. Choose it for small hospitals and clinics, and state those services.

Activated sludge processes

Batch activated sludge, oxidation ditch and intermittent aeration are among Japan's certified types above 50 persons. Choose one for large, steady loads, with an operator on hand for weekly checks.

Membrane separation units

Certified in Japan to under 5 mg/L of BOD, from 5 persons upward. Choose it where the outlet target is strict, and price the membrane care with the unit.

How to brief a commercial johkasou supplier in Bangladesh

Plan and uses: Give floor areas for every use: rooms, halls, dining, offices, wards. Persons for each use are added together.
Kitchen load: Say how many covers or meals a day and whether the menu is oily. Japan's table typically treats restaurants as low, normal or high load.
Beds and services: For a hospital or clinic, give the number of beds and whether a kitchen or laundry operates on site.
Outlet target: State the BOD you need, and any nitrogen or phosphorus limit. Japan's guidance picks the process from the site, the discharge standard, the influent and how it will be maintained, not capacity alone.
What stays out: No industrial wastewater, rainwater, oils or fats into the unit. Ask whether screening and flow equalisation are needed ahead of the tank.
Power and standby: Blowers and pumps must never be switched off. Give the supply at 50 Hz and use the generator circuit.
Operator and access: Name who checks the plant between service visits, and keep a tanker route to every lid.

Standards and rules for a commercial johkasou

JIS A 3302: The Japanese Industrial Standard that converts floor area and use into persons served. Ask the seller to show the arithmetic for each use in your plan.
Johkasou Act (Japan): In Japan it ties each unit to registered installers, licensed operators and permitted desludging firms. Use that split to ask who will install, operate and desludge yours.
Water Pollution Control Act (Japan): In Japan, units serving 501 or more persons, or 201 in some prefectures, also fall under this law's effluent regulation.
ECR 2023 and Environmental Clearance: Bangladesh's effluent standards sit in the Environment Conservation Rules 2023. Check whether your project's DoE Environmental Clearance sets outlet conditions, and pass them to the seller.

What moves the price of a commercial johkasou

Persons served: floor area and use set the count, and kitchens push it up.
Process: activated sludge and membrane designs usually cost more than contact aeration units.
Outlet target: nitrogen and phosphorus removal add treatment steps.
Pretreatment: grease traps, screening and flow equalisation ahead of the unit.
Civil work: base plates, dewatering and top slabs for several large tanks.
Operation: weekly or fortnightly checks, desludging and disinfectant.

Lead times and delivery

No figure holds for every project. Time depends on agreeing the sizing and process, on whether the seller holds the model in Bangladesh or brings it in to order, and on civil work and groundwater. On a new building the unit fits the construction programme. Treatment must settle before the outlet test. Roptan confirms the dates, and any minimum, in the quote.

We deliver to site across Bangladesh, and the seller or its installer builds the bases, sets the tanks and connects pumps, blowers and pipes. After construction, each unit and auxiliary item is run, levels are rechecked, and the installer confirms there are no leaks and water flows correctly. Handover covers the documents, operating instructions for your staff and a VAT invoice (Mushak 6.3).

What we check for this order

Sizing per useWe check the seller's count use by use against your plan, halls, kitchens and beds included.
Process against targetWe confirm in writing that the process meets your outlet target, and the operator time it needs.
Commissioning recordWe ask for the record that each unit runs, nothing leaks and water flows correctly.
Service capacity near siteWe check that a contractor with a suitable pump and sludge gauge can reach you.

Questions buyers ask

How is a restaurant johkasou sized?

Usually from floor area and pollutant load, not seats alone. Japan's table typically counts a busy kitchen at several times the persons of an office the same size. Give the seller your floor area and meals a day, and plan a grease trap ahead of the unit.

Can one unit serve a whole hotel?

Often, if its process covers the total persons. Japan sizes a unit serving several uses or buildings on their sum. Above 50 persons, certified processes such as batch activated sludge take over from small standard units.

How often does a commercial unit need checks?

It depends on the process. Japan's example gives weekly checks for activated sludge units and for units with a sand filter or carbon stage, and every two weeks for units with screening and flow equalisation. Write the interval into the service contract.

Who desludges a large johkasou in Bangladesh?

A contractor with a self-priming pump, a sludge and scum gauge and cleaning gear, as Japan requires of desludging firms. Availability varies by district, so Roptan checks who can reach your site and arranges the work through the seller or a local contractor.

How soon will I hear back about johkasou?

Within 48 hours of a complete requirement, with a price and a delivery date. A requirement is complete when it has the capacity, where it is needed and by when.

Who do I deal with?

With Roptan, when Roptan manages the order: we buy from the verified seller and deliver to you. With the supplier directly, when you post on the requirement board and choose a quote yourself.