... coating is composed of aluminum alloy and sealant.1,Sewage treatment fieldAnaerobic, aerobic reactor(UASB, EGSB, HUSB, SBR, BAF, contact oxidation ... pool, buffer pool, clarifier, sludge storage tank, etc. )2,Solid waste treatment fieldAnaerobic fermentation tank(USR, CSTR)Wet biogas storage cabinet3,Agriculture ...