Alum Coagulant Supplier — Vadodara, Gujarat

Alum (aluminium sulphate) from Drashti Chemicals is the entry-level coagulant for small ETPs, community water filters, and industrial pre-treatment across Gujarat. Available in lump and fine powder, alum clarifies turbid water by forming aluminium hydroxide floc that entraps suspended particles. For plants graduating from manual lime treatment, alum is the first chemical coagulant most process engineers specify.

Specify lump for saturator-type dissolution systems where gradual release over 8–12 hours is acceptable; specify powder for rapid batch preparation in small plants without saturator infrastructure. Non-ferric grade recommended when treated water enters RO or food process; ferric grade acceptable for discharge-only ETP. Drashti COA confirms Al₂O₃ and iron content — attach to your ISO 14001 incoming material records.

Preparation: 8–10% solution in water with agitation; lumps dissolve in 4–6 hours, powder in 1–2 hours. Dose 30–150 mg/L depending on turbidity — jar test with 1 L beakers remains best practice. Post-dose pH often drops to 5.5–6.0; add soda ash or lime to maintain pH 6.5–7.5 for optimal floc. Sludge volume is higher than PAC — size clarifier accordingly.

Packaging: 50 kg HDPE bags. MOQ one bag; bulk quote on request for 5 MT+ monthly supply to water treatment contractors. MSDS and COA per lot. Store dry — caked alum is difficult to break and slows dissolution. Drashti Chemicals Vadodara, GST 24AGLPC6288M1ZX, serves Anand, Kheda, and Panchmahal districts within 24-hour dispatch.

Alum vs. poly aluminium chloride: PAC doses at 30–50% lower weight, produces less sludge, and works over wider pH range — upgrade path when sludge disposal cost exceeds coagulant saving. Alum vs. ferric alum: standard alum has lower iron; ferric alum removes colour more aggressively. Drashti stocks both — request side-by-side jar test kit with sample order.