10 person johkasou supplier in Bangladesh

Roptan works as your 10 person johkasou supplier in Bangladesh for duplexes and small shared buildings. Send us the plan, the households and the outlet route: we source a unit from a verified seller, check the sizing and papers, and deliver to site.

Verified sellers
Checked before it ships
Delivered by Roptan

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

Buying 10 person johkasou in Bangladesh

A 10 person johkasou treats the toilet, kitchen and bath water of a larger household in one buried tank, then settles and disinfects it. At 200 litres and 40 g of BOD per person a day, it is designed for 2,000 litres and 400 g of BOD daily. In Bangladesh it fits duplex houses, two-family homes, small flats and staff quarters with no sewer to join.

A 10 person johkasou supplier in Bangladesh has to size the unit from your building, not from a headcount guessed on the phone. Roptan sources from verified sellers, checks the calculation, the model's structure papers and the service terms, and compares installed prices. The seller or its installer sets and commissions the tank.

Kinds of 10 person johkasou

Units for a duplex or two-kitchen house

Japan's sizing table typically counts a house with two kitchens and two bathrooms as 10 persons, whatever its floor area. Choose this size for a duplex or a house shared by two families.

Shared units for two buildings

One unit may serve more than one building, sized on the sum of persons for each. Choose it where two small houses on one plot can share an outlet and a service contract.

Nitrogen removal units

Certified in Japan to under 10 mg/L of BOD and of total nitrogen at the outlet. Choose it where treated water drains to a pond, canal or low ground beside the plot.

Membrane separation units

A membrane filters the treated water to the Japanese class of under 5 mg/L of BOD. Choose it when the outlet must be very clear, and price its membrane care first.

How to brief a 10 person johkasou supplier in Bangladesh

Households and people: Count each household, live-in staff and regular guests. Fractions of a person are rounded up, so a count just over the size moves you to the next unit.
Building plan: Send floor areas, the number of kitchens and bathrooms, and any mixed use. Where a building has several uses, the persons for each use are added together.
Grey water and fats: Say whether kitchen and bath water join toilet water. Keep rainwater, oils, nappies and pesticides out, and add pretreatment for a heavy kitchen.
Ground and groundwater: Give the soil and the highest monsoon water level. High groundwater needs dewatering during the dig and measures that stop the tank floating.
Access for service: A concrete slab is cast over the tank. Keep the lids and the tanker route clear, since nothing may block inspection or desludging later.
Blower supply: An earthed, waterproof single phase supply at 50 Hz, with the blower on its own base. Connect it to the IPS or generator, since it must never be switched off.

Standards and papers for a 10 person johkasou

JIS A 3302: The Japanese Industrial Standard behind person counts by building use, cited by Japan's Ministry of the Environment. Ask the seller which row of its table they used for your building.
Johkasou Act (Japan): Japanese law that requires yearly upkeep, desludging and a water quality inspection in Japan. It does not bind you in Bangladesh, but it shows what a full service contract covers.
Type approval and structure: Japan approves factory-made types for 5 years and recognises standard and certified structures. Ask for the document, or a written statement that the model has none.
Maintenance records: In Japan, maintenance, inspection and desludging records are kept for three years. Ask for the first inspection record at handover and keep every later one.

What moves the price of a 10 person johkasou

Process class: nitrogen removal and membrane designs usually cost more than a standard unit.
Sharing: one unit for two buildings saves a tank but adds longer pipe runs.
Ground: dewatering and anchoring on wet sites, more so in the monsoon.
Civil work: the rubble bed, base plate and top slab cast on site.
Service: about three inspection visits a year in the Japanese example, plus yearly desludging.

Lead times and delivery

There is no fixed figure. A unit the seller holds in Bangladesh moves faster than one brought in to order, and a dry season dig is quicker than one through monsoon groundwater. The base plate and top slab are cast on site, and the outlet test waits until treatment settles. Roptan confirms the dates, and any minimum, in the quote.

We deliver to site across Bangladesh. The seller or its installer prepares a compacted rubble bed and a reinforced base plate, sets the tank level, fills it with water and backfills in compacted layers. Inflow, outflow and air pipes are connected, the blower goes on its own foundation and the unit is test run. You receive the documents, an upkeep briefing and a VAT invoice (Mushak 6.3).

What we check for this order

Person count from the planWe check the seller's figure against your kitchens, bathrooms and households.
Structure and approval in writingWe ask whether the model is standard or certified, and for its approval document or a statement that none exists.
Installation photosWe ask for photos of the base plate, level and anchoring before backfill.
First inspection recordWe ask for the first inspection record, which checks the design persons suit the real users.

Questions buyers ask

Do I need a 10 person unit or two 5 person units?

Usually one 10 person unit, if both households drain to one point: one tank, one blower, one service visit. Two units can suit buildings far apart. Either way, size each unit on its persons, rounded up.

How often will a 10 person johkasou be inspected?

The maker sets the interval. Japan's example for contact aeration units under 20 persons is at least every 4 months, so plan about three visits a year, plus desludging once a year. Each visit should leave a written record.

Can water from two kitchens go in?

Yes, kitchen and bath water are meant to join toilet water. Fats and cooking oil should not, because they disturb the treatment. With two busy kitchens, ask the seller for pretreatment such as a grease trap ahead of the unit.

What outlet quality should I ask for?

Ask the seller to state the expected BOD and TSS in writing. Bangladesh's effluent standards sit in the Environment Conservation Rules 2023. In Japan, nitrogen removal units are certified to under 10 mg/L of BOD, a useful benchmark if your outlet reaches a pond.

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.