Biogas from anaerobic digesters corrodes steel tanks. PP FRP STP Tanks in Ghaziabad from UK Enviro Systems resist both H₂S and methane. Dual-laminate design with PP liner and FRP outer shell. Features include gas-tight manways and anti-floating anchors. Perfect for sludge digesters and secondary clarifiers. Choose safety and longevity. Contact India’s most experienced fabricator.