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C. pH #3 adjustment tank: <br /> lEa. 1000gallon poly tank <br /> lEa. Lightnin mixer (Model:XJQ-43) <br /> lEa. 3-way solenoid valve <br /> (Cat. : FF8320G174) <br /> lEa. Caustic feeding valve <br /> (Model: 2600 Miniflex) <br /> lEa. pH probe (Model: pH 6021P0) <br /> lEa. 3-way diverting valve <br /> (Model: NT10400FACT) with <br /> Electrical actuator <br /> (Model: BV030035W) <br /> D. Acid feeding tank: <br /> lEa. 500 gallon poly tank <br /> 3Ea. LMI metering pump <br /> (Model:C731-25P) <br /> 7Ea. 1/2" true union ball valves <br /> C. Caustic feeding tank: <br /> lEa. 500 gallon poly tank <br /> lEa. Wilden pump (Model: M4/TF/TF/PT) <br /> 6Ea. 1 1/2" true union ball valves <br /> lEa. Filter/Regulator/Lubricator set <br /> lEa. 2-way air solenoid valve <br /> (Cat. : 8210D1) <br /> 3 . 2 pH adjustment tank Kari float switch from the equal. <br /> elect. operation tank energizes one of the self prim- <br /> ing centrifugal pumps to pump the <br /> wastewater to the pH adjustment tank <br /> #1. In addition the Kari float switch <br /> energizes: <br /> 1. 2-way air solenoid valve to operate <br /> the caustic circulation pump . <br /> 2 . to make the elect. power available <br /> to all 3-way air solenoid valves to <br /> operate the caustic feeding valves, <br /> and all three acid metering pumps. <br /> 3 . 3 pH adjustment operation <br /> 1 . pH #1 Adjustment tank: <br /> Wastewater flows into the pH #1 <br /> adjustment tank, when the pH ranges <br /> from 0 to 4 , the pH probe #1 will send <br /> a signal to the pH monitor #1 on the <br /> electrical panel which will energize <br /> the 3-way air solenoid valve to open <br /> the caustic feeding valve 01 to adjust <br /> the pH. <br />