Water purification treatment engineering. Dissolving oxygen into water to achieve higher oxygen transference in biochemical treatment. Removal of organism in wastewater, churning and mixing to prevent wastewater scum. Special for aquatic cultivation. Special for social effects of pollution treatment. POWER REQUIREMENT: 1.5Kw~30Kw. m3/HR: 35~605. kg.O2/HR: 1.64~38.96. PUMP MATERIAL: FC200, SCS13, SCS14.