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Washing Cost Calculator
Total washing cost per piece — labour, chemicals, water, fuel, overhead.
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ETP Cost Calculator — Effluent Treatment Plant Cost per m³
Calculate the true cost of treating one cubic metre of washing effluent, covering chemicals, power, labour, sludge disposal, and maintenance. Allocate ETP cost accurately to each washing job. No account needed — numbers update as you type.
Step By Step
How to Use This Calculator
5 steps
- Enter the daily effluent volume treated in cubic metres (m³).
- Input chemical costs for the ETP process (coagulants, flocculants, pH adjustment).
- Add electricity cost per kWh and the ETP's daily power consumption.
- Enter labour cost for ETP operation (dedicated staff).
- Include sludge disposal cost per tonne and estimated daily sludge volume.
Worked Example
ETP Cost Example
Use this sample to sanity-check your inputs and understand what the final result represents.
- 1Daily Effluent: 200 m³
- 2Chemical Cost: BDT 3,000/day
- 3Power Cost: BDT 1,500/day
- 4Labour: BDT 1,200/day
- 5Sludge Disposal: BDT 800/day
Final Result
Total Daily ETP Cost: BDT 6,500 | Cost per m³: BDT 32.50 | Per piece (5L effluent): BDT 0.16
Methodology
ETP Cost Formula
This section explains the calculation logic, assumptions, and source material used to make the result more trustworthy and easier to verify.
Total Daily ETP Cost = Chemical Cost + Power Cost + Labour Cost + Sludge Disposal + Maintenance
Cost per m³ = Total Daily Cost ÷ Daily Volume Treated (m³)
Effluent Volume per Piece = Total Daily Effluent ÷ Pieces Processed per Day
ETP Cost per Piece = Cost per m³ × Effluent Volume per Piece
Practical Guidance
ETP Operation & Cost Tips
- 1ETP chemical cost is significantly reduced by reducing chemical use in the washing plant itself — less pollution means less treatment cost.
- 2Sludge disposal is often underestimated. Properly dewatered sludge can reduce disposal volume by 60–70% and lower trucking costs.
- 3pH neutralisation is the cheapest ETP step — keep incoming effluent pH between 6 and 9 by controlling chemical dosage in washing to reduce acid/alkali usage in ETP.
- 4Regular ETP performance tests (BOD, COD, TSS) ensure compliance and let you catch process upsets before they become DoE violations.
- 5Some ETP treated water can be recycled for non-critical uses (machine cooling, toilet flushing), cutting your fresh water bill.
Frequently Asked Questions
Is an ETP mandatory for garment washing plants in Bangladesh?+
Yes. The Bangladesh Environment Conservation Act 1995 and DoE regulations require all industrial units generating liquid effluent to have an operational Effluent Treatment Plant. Operating without an ETP or with a non-functional ETP can result in factory closure, fines, and loss of export licence.
What is the typical ETP cost per cubic metre in Bangladesh?+
Based on industry data, ETP treatment costs range from BDT 20–60 per cubic metre depending on plant size, technology type (biological vs chemical), and effluent characteristics. Plants with high COD loads (from reactive dyes) sit at the higher end.
What parameters does Bangladesh DoE check in ETP discharge?+
The key parameters are pH (6.5–8.5), BOD (≤50 mg/L), COD (≤200 mg/L), TSS (≤100 mg/L), TDS (≤2,100 mg/L), and colour (≤150 ADMI units). Heavy metal limits apply for specific chemicals. Regular third-party testing and DoE inspection records are required.
Can I reduce ETP cost by using less water in washing?+
Yes — directly. Less water in washing means less effluent to treat. Cutting water consumption by 30% reduces your daily effluent volume and ETP operating costs by roughly the same proportion. This is one of the strongest financial arguments for investing in low-liquor-ratio washing machines.