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E . Polymer ( 2839 ) Tank lea. - 100 Gal . polypropylene tank <br /> lea. - Metering pump(Model:D431-20 ) <br /> lea. - Bari float switch(Model : MIA ) <br /> lea. - 1/2 ' 'ball foot valves <br /> F. Polymer ( 2844 ) Tank lea . - 100 Gal .polypropylene tank <br /> lea. - Metering pump(Model : D431-20HV) <br /> lea. - Kari float switch(Model : MIA) <br /> lea. - 1/2 "ball foot valves <br /> G . Caustic Tank lea. - 5000 Gal .polypropylene tank <br /> lea. - Wilden pump (Model :M4-WW NE/NF./NE <br /> lea . - F/R/L set <br /> lea. - 2-way solenoid valve(Cat. #8210D1 ) <br /> 3 . 1 pH Adjustment Tank Kari float switch from equalization tank <br /> Electrical Operation B energizes one of the self priming <br /> centrifugal pumps to pump wastewater <br /> to pH adjustment tank 1 . <br /> In addition the Kari float switch <br /> energizes : _pH adj . tank 1 mixer , pH <br /> adj . tank 2 mixer, flocculation tank <br /> mixer, polymer ( 2844 ) tank mixer , 2-wa7 <br /> solenoid caustic transfer pump; and <br /> makes electrical power available to : <br /> acid metering pumps, polymer metering <br /> pumps , and 3-way solenoid caustic feed <br /> valves . <br /> 3 . 2 pH Adjustment Tank <br /> Operation <br /> t pH Adjustment Tank 1 Wastewaters flow into pH adjustment <br /> Operation tank 1 , if 0 to 4 pH range, pH probe <br /> #1 will send a signal to the pH monitor <br /> #1 on the electrical panel which will <br /> energize the 3-way solenoid valve to <br /> open the pink valve (caustic valve ) . <br /> - If 4 to 11 pH range , there- is no <br /> acid or caustic feeding necessary. <br /> - If 11 to 12 pH range, pH probe #1 <br /> sends a signal to the pH monitor #1 <br /> on electrical panel to energize acid <br /> metering pump #1 . <br /> t pH Adjustment Tank 2 After pH treatment from pH adjustment <br /> Operation tank 1 , the wastewater flows to pH <br /> adjustment tank 2 for any necessary <br /> treatment. <br /> - If 0 to 6 . 5 pH range, the pH probe #2 <br /> will send a signal to the pH monitor #2 <br /> on the electrical panel which will <br /> energize : <br />