Switching Boiler Fuel in Gujarat: Consent, Documentation and What to Check with GPCB

Industrial units in Gujarat operate under consent conditions issued by the Gujarat Pollution Control Board (GPCB). When you change boiler fuel, you should check what those conditions say. This article is a practical checklist, not legal advice, and it does not claim that any fuel is “GPCB approved”. We do not know of an official GPCB list approving briquettes or pellets, and we do not assume one exists. The position is as of October 2026; confirm with the issuing authority.

Start with Your Own Consent Conditions

The consent to operate issued to your unit lists the permitted fuels, stack heights, monitoring requirements and emission limits applicable to your boiler. Limits depend on boiler capacity, fuel and location, and are set under the environmental rules and in your consent. Read these first. If the fuel you plan to use is not listed, ask GPCB whether an amendment or intimation is needed before the switch.

What Usually Changes When You Move from Coal to Biomass

• Ash quantity and handling: Indian coal ash is generally 25 to 45% according to the Ministry of Coal, while BBI briquettes and pellets are below 10%, typically 2 to 8% depending on feedstock.
• Particulate matter: depends on combustion quality and your pollution control equipment, so test it on your own stack.
• Sulphur: BBI’s specification is below 0.1%. Indian coal is officially described as low in sulphur, so we do not claim a sulphur advantage over coal.
• Combustion settings: air and feed adjustments are normally needed, and should be recorded.

Documentation to Keep

BBI can provide invoices, delivery records and a batch lab report. We cannot provide a GPCB approval, and we do not file compliance applications on your behalf.

Delhi-NCR Is a Separate Case

The Commission for Air Quality Management (CAQM) maintains an approved-fuel framework for the Delhi-NCR, which is specific to that region. It does not apply to Gujarat units.

Frequently Asked Questions

Is white coal approved by GPCB?

We do not claim approval. Ask GPCB or check your consent conditions for the fuels permitted for your unit.

Will switching fuel remove the need for stack testing?

No. Monitoring requirements in your consent continue to apply.

A Practical Sequence for the Switch

Plant teams usually get into trouble not because the fuel is wrong but because the paperwork and the trial are run in the wrong order. A workable sequence for a Gujarat boiler or thermic fluid heater looks like this.

1. Pull out the current consent to operate and list every condition that mentions fuel, stack height, stack monitoring frequency and emission parameters.
2. Write to the regional office or raise the query through your environment consultant, asking in plain words whether a change of fuel from coal or wood to agro-residue briquettes or pellets needs an amendment or only an intimation. Keep the reply on file.
3. Take a baseline stack test on the existing fuel before anything changes. Without a baseline you cannot show what the new fuel did.
4. Run a limited trial on one boiler with a 25 MT lot, and schedule a second stack test while the trial fuel is being fired at normal load.
5. Only then decide on a standing supply contract.

What a Stack Test Actually Tells You

Stack results are the evidence that matters, because they describe your boiler, your pollution control equipment and your operating practice together. Two plants burning the same fuel can post different particulate readings if one has a working cyclone or bag filter and the other does not, or if one holds a steadier air-to-fuel ratio. Ask your monitoring laboratory to record the boiler load, fuel feed rate and the fuel batch reference at the time of sampling. That lets you tie a reading back to a specific consignment and its lab report.

Pollution control equipment to inspect before the trial

• Cyclone or multi-cyclone dust collector: check for worn vanes and air ingress at the hopper.
• Bag filter or scrubber where fitted: confirm differential pressure readings are being logged.
• Stack sampling port and platform: make sure it is accessible and located as the monitoring protocol expects.
• Induced draft fan: biomass flue gas volumes differ from coal, so confirm the fan has headroom.

Questions Worth Asking Your Fuel Supplier

A supplier cannot confer a regulatory status on a fuel, and you should be wary of any who offers one. What a supplier can do is give you traceable facts you can place in your file.

• Which agro-residues went into this batch, and is the blend consistent from lot to lot?
• Can you share the batch lab report showing GCV, moisture, ash and sulphur, and what are the limits you work to?
• Is any binder or additive used, and is that information included in the product specification?
• How are delivery dates, vehicle numbers and weighbridge slips recorded, so that quantities in your boiler logbook reconcile with invoices?

Keeping the File Audit Ready

Inspectors and auditors tend to ask the same simple things: what fuel are you burning, how much, and where is the proof. A tidy monthly folder answers all three. Put the invoices, weighbridge slips, lab reports, boiler log extracts and any stack test report for the month in one place, and note any change in fuel source or blend. If you also read our overview of biomass pellet quality standards in India, you will see how the BIS standards for pellets and briquettes can serve as a reference for your purchase specification, even though BIS marking is voluntary. For the mechanical side of the changeover, the boiler retrofitting guide covers grates, feeders and ash handling, and the plant manager questions article lists what operations teams usually want answered first.

Nothing here replaces advice from your environment consultant or the board itself. The aim is simply to make sure that when you approach GPCB, you bring a baseline, a trial plan and fuel records rather than a general question.