Inside the pipe after fine screen SC02, pH/COD meter (pH/COD02) is installed to test pH and COD value. If pH or COD inlet is over the permitted range, waste water will flow to Calamity Tank T02-B; otherwise waste water will flow to Equalization Tank T02-A. The flow rate of wastewater will be control by auto valve CV02-A/B.The Equalization tank is used to balance wastewater flow-rate, concentrations of pollutants and temperature. Furthermore, organics in the wastewater are partly degraded under anaerobic and aerobic condition. The regulation of flow-rate and pollutant strength is accomplished by air installed in the bottom of the tank. Submersible ejector SE02-A/B/C/D/E/F are installed to provide mixing condition.Wastewater in Calamity tank will be pumped frequency to Equalization tank by submersible pump WP02-C/D (01 duty and 01 stand-by). Wastewater in equalization tank continuous being pumped to distribution tank T03 by wastewater pumps WP02-A/B (01 duty and 01 stand-by).
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