Water treatment
PAC vs alum: choosing a water-treatment coagulant in Nepal
Choose PAC or alum by testing it against your source water and treatment process, not by assuming one product always performs better. Compare the supplied specification, jar-test results and total operating requirements before ordering.
By Everest Super Chemical Udhyog · Published
Start with the job your plant needs to do
PAC and alum are coagulants used in water clarification. Their selection depends on the water being treated and the treatment train. Health Canada's technical guidance describes jar testing as a way to compare coagulant types, dose, pH and mixing conditions. It does not establish a universal winner for every plant.
For a Nepal-based purchasing team, the useful starting point is the operating problem: changing raw-water conditions, difficult clarification, an existing product that is no longer performing as expected, or a planned replacement. Give the supplier this context rather than requesting a generic substitute by price alone.
Compare like-for-like quotations
Ask for the exact product identity, supplied form and specification behind each quotation. A bag price alone does not tell you the treatment cost. Have your operator assess the amount used, preparation requirements, dosing equipment, process adjustments and residuals handling for your actual conditions.
Record the comparison in a short approval sheet. Keep the product specification and trial observations beside the quotation so a manager can see why one option was selected. If the trial is inconclusive, ask what further information is needed instead of treating an unverified claim as a saving.
- Source-water report and the date it was taken
- Current chemical, operating conditions and treatment objective
- Required grade, form and product documentation
- Trial method and acceptance criteria agreed by the operator
- Quantity, delivery town and required arrival date
Plan a change before placing the bulk order
A new coagulant may require a review of the preparation and dosing arrangement. Let the responsible operator approve the change and its monitoring plan. Do not copy a dose from another site or assume two differently specified products can be exchanged in the same quantity.
Send ESCU the products you want to compare, your required quantity and delivery location. SDS and related product documents are provided following an enquiry. Review those documents and the quotation with your team before confirming the order. ESCU can then discuss supply and delivery arrangements from Kathmandu for your destination.
Sources and scope
General guidance checked on 27 October 2026 against the sources below. These sources do not verify ESCU's supplied specifications or replace the product label, SDS and site operator's instructions. Foreign guidance is background information, not a statement of Nepal's regulatory requirements.