Effluent Treatment Plant (ETP) Consultant

What an ETP consultant actually does

An effluent treatment plant is designed around one specific effluent, not from a catalogue. As an ETP consultant we start with characterisation - flow, COD, BOD, TDS, pH swing, colour, toxicity and how much all of that varies across a shift - and design backwards from the discharge standard in your consent.

Most failing ETPs we are called to were not built wrong. They were built for an effluent the plant no longer produces, after a product mix or capacity change that nobody translated into a treatment requirement.

Where ETP projects usually go wrong

• Design on nameplate flow. Peak shift load, not average, sizes the equalisation tank - and an undersized equalisation tank destabilises everything downstream
• Ignoring shock loads. A single batch dump of solvent or high-TDS liquor can kill a biological stage for days
• No sludge plan. Sludge is a hazardous waste with its own authorisation, storage and disposal cost, and it is routinely left out of the operating budget
• Treating recovery as an afterthought. Where water is scarce or expensive, recovery should shape the design, not be bolted on later

Our scope

• Effluent characterisation and treatability study, including bench trials
• Process design - primary, biological and tertiary stages selected for your effluent rather than a standard train
• Detailed engineering, equipment specification and vendor evaluation
• Erection, commissioning and stabilisation of the biological stage
• Operator training and a written operating philosophy
• Consent documentation for MPCB or GPCB, and support during inspection

Upgrading an existing ETP

A large share of our work is on plants that already exist and no longer meet consent conditions, or that cost too much to run. That work starts with a performance audit against the original design basis - which frequently shows the plant is doing exactly what it was designed to do, for an effluent that has since changed.

ETP, STP and ZLD

An ETP treats industrial process effluent. A sewage treatment plant treats domestic sewage - different load, different biology, different consent condition. Where discharge is not permitted at all, the ETP becomes the front end of a zero liquid discharge train, with reverse osmosis for volume reduction and an evaporator on the reject.