MST-140 Small Sewage Treatment System (SSTS) 140 PE
MST-140 FRP small sewage treatment system (SSTS) for 140 PE. One horizontal tank, 6,666 x 2,400 x 2,650 mm, 26,471 litres. Upflow activated sludge to Modified Standard B effluent.
MST-140 Small Sewage Treatment System for 140 PE
The MST-140 is Mui Fatt's FRP (fibreglass) small sewage treatment system (SSTS) for sites of up to 140 PE (population equivalent), or about 28 houses. It is one horizontal tank, 6,666 mm long, 2,400 mm wide and 2,650 mm high, holding 26,471 litres. It treats domestic sewage by upflow activated sludge to Modified Standard B effluent. The system is SIRIM certified, Mui Fatt is registered with SPAN, and it is built to IWK guidelines.
Specifications
| Model | MST-140 |
|---|---|
| Population equivalent | 140 PE |
| Capacity | 26,471 litres |
| Tank length | 6,666 mm |
| Tank width (diameter) | 2,400 mm |
| Overall height (H1) | 2,650 mm |
| Water level (H2) | 2,000 mm |
| Inlet and outlet pipe | 150 mm |
| Tank type | Horizontal, one-piece FRP tank |
| Process | Upflow activated sludge (anaerobic settling, then aerobic treatment with diffused air) |
| Type of waste | Domestic sewage |
| Effluent | Modified Standard B, Environmental Quality (Sewage and Industrial Effluents) Regulations |
| Desludging | Once every 2 years |
| Certification | SIRIM certified (MS 2441-2:2014); registered with SPAN; built to IWK guidelines |
| Warranty | 5 years against manufacturing defects |
| Design life | 15 to 20+ years |
How It Works
Sewage enters the lower part of the tank, where solids settle and break down without air (anaerobic). The liquid then rises into the aeration chamber, where air from the blowers is pumped in through the built-in diffuser so that bacteria (activated sludge) treat it aerobically. Treated water leaves through the 150 mm outlet.
What Mui Fatt Supplies
- Primary and aeration tank, sized for 140 PE
- Air diffuser, built into the tank
- Transfer pipe, VCP pipe and inspection chamber, built into the unit
- SIRIM certificate and product documents
- Help with IWK and SPAN submissions, with free submission drawings
What the Contractor Provides
- Base slab, concrete plinth, screen and distribution chambers
- Air blowers (1 duty, 1 standby) and control panel, with mechanical and electrical connection
- Excavation, shoring and backfill
- Fencing, site works and CCTV inspection with the IWK officer
Why Choose the MST
- One tank: no external piping between tanks
- Saves space: takes 20 to 30% less space than comparable systems
- Fast to install: can be installed in a single day under standard site conditions
- FRP body: corrosion resistant, watertight and light to transport
Approval Steps
1. Design and sizing (PE calculation, layout, invert levels). 2. Submission (SWA, SWC, e-SWAP). 3. Installation and testing. 4. Inspection forms PDC6, PDC7 and PDC8. 5. Surat Sokongan. See our SSTS submission service → and IWK submission services →.
Frequently Asked Questions
How many houses can the MST-140 serve?
About 28 houses. A typical house counts as 5 PE, so 140 PE is about 28 houses. A factory worker counts as 0.3 PE and an office as 0.03 PE per m² of floor area.
Who supplies the air blowers?
The contractor. Two air blowers (1 duty, 1 standby) and the control panel are compulsory and are installed by the contractor. Mui Fatt supplies the tank with the air diffuser built in.
How often does it need desludging?
Once every 2 years.
What is the warranty?
5 years against manufacturing defects. The warranty covers workmanship only, not misuse or installation that does not follow the installation manual. Design life of the FRP tank is 15 to 20+ years.
Other Sizes
Nearest sizes: MST-120 for 120 PE → and MST-150 for 150 PE →. Compare all ten models in the FRP small sewage treatment system range →, size your site with the PE sizing guide →, or rent an MST → for a temporary site. For 30 PE and below, see Bio-Filter septic tanks →.
Ringkasan (Bahasa Melayu)
MST-140 ialah sistem rawatan kumbahan kecil (SSTS) FRP untuk 140 PE: satu tangki mendatar 6,666 mm x 2,400 mm x 2,650 mm, 26,471 liter, efluen Standard B Terubah Suai. Diperakui SIRIM, berdaftar dengan SPAN, mengikut garis panduan IWK. Jaminan 5 tahun terhadap kecacatan pembuatan.
