A wastewater report becomes more useful when the plant team can explain the story behind it: what entered production, how the ETP operated, where the samples were collected, and what happened to the sludge. ZDHC helps connect those parts of wet processing. Use it alongside Bangladesh’s legal requirements and the requirements agreed with the buyer.
Start with the correct scope
The wastewater and sludge programme addresses relevant textile, apparel, leather, and footwear wet-processing suppliers. Identify the facility’s discharge arrangement before selecting a testing package: direct discharge, an applicable indirect-discharge category, or zero liquid discharge. A sewing-only facility’s separate domestic sewage should not automatically receive the same scope as a dyeing ETP. The industrial wastewater flow threshold affects programme requirements; it does not create an exemption from Bangladesh law.
Keep the requirement and its basis together
| Record | What to retain |
|---|---|
| Wastewater | Discharge type, flow basis, approved sampling point, parameter, unit, test method, and applicable level. |
| Chemical input | Chemical inventory, relevant MRSL information, purchasing controls, and production traceability. |
| Sludge | Quantity, test record, disposal pathway, contractor authorization where applicable, and receiving evidence. |
| Follow-up | Root cause, action owner, due date, and evidence that the action worked. |
Foundational, Progressive, and Aspirational results belong to a defined parameter and programme scope. Keep the legal compliance matrix separate and compare requirements only when their sampling basis, units, and receiving route are comparable. A good ZDHC result alone does not establish drinking-water safety or suitability for every reuse application.
Turn a result into a practical investigation
- Pair the laboratory report with production, flow, pH, dosing, aeration, and sludge-handling records from the sampling period.
- For an unexpected substance, trace the relevant chemical inputs and process changes before changing ETP dosing.
- For a conventional parameter, check loading, treatment performance, sampling, and laboratory information together.
- Use the official ETP Assessment material to connect process design, operational control, and team competence.
A short exercise
For an illustrative day, 300 m³ of effluent at 200 mg/L COD carries 60 kg COD. Calculate the load from your own verified flow and sample basis, then explain why concentration alone cannot describe the day’s total discharge. The numbers here are a calculation example, not a prescribed limit.
Edition and reporting check
Checked 14 November 2026: the official digital programme identifies V1 as active and says V2 replaces it from 1 December 2026, when its implementation period starts. Use the active edition for the reporting cycle and retain the applicable transition instructions. Open the official programme for current sampling, laboratory, reporting, and sludge requirements.
Official sources and further reading
- Active wastewater and sludge programme
- Sampling and testing scope
- Sludge disposal documentation
- Output and ETP Assessment
Related practical resources
ECR 2023 downloads · Excel workbooks and checklists · Higg FEM for Water and Wastewater · ISO for Water and Wastewater Management
Practice downloads
Use the bilingual PDF worksheets in print or alongside the editable Excel files. Examples are for learning; adapt the records to the approved procedures and requirements at your site.
- Environmental aspects and compliance register (PDF · English / বাংলা)
- HIRA and environmental aspect registers — Excel (.xlsx)
Bangladesh Water Act, Water Rules and WARPO · 3R Water Planning in the Textile Industry · Environmental Aspects and Impacts in Treatment Plants
Leave a Reply