1. Flow and operating pattern
Provide average daily flow, peak hourly flow, operating hours and any seasonal or batch variation. Explain whether equalization is available.
2. Representative influent data
Include pH, temperature, COD, BOD, suspended solids, oil and grease, ammonia, nitrogen, phosphorus, salinity and any industry-specific contaminants. State how and when samples were taken.
3. Outlet requirement
Attach the local discharge or reuse standard and identify the exact parameter limits. Explain whether the treated water goes to sewer, surface discharge, irrigation or process reuse.
4. Existing process and site
Describe any current tanks or equipment, available footprint, elevation limits, indoor or outdoor installation, ambient temperature, utilities and operator availability. Provide drawings and photographs when possible.
5. Required supply boundary
State whether the supplier should include tanks, screens, pumps, aeration, dosing, filtration, disinfection, sludge handling, piping, instruments, controls, platform, installation supervision and commissioning.
6. Commercial and export information
Provide destination, required shipping terms, electrical standard, preferred documentation language, inspection requirement and target delivery date.
7. Questions for comparison
Ask for design assumptions, process calculation, major equipment list, material specification, power load, chemical use, sludge production, automation level, consumables, spare parts, warranty and exclusions. Review the complete lifecycle and operating scope rather than comparing only total price.