A groundwater borehole at USM engineering campus contains 3000 mg/L of TDS. The flow is 0.32 m3 /s. The design TDS concentration of the product water is below 400 mg/L. The net pressure is 40 atm. The membrane manufacturer provides that the membrane has a water flux rate coefficient of 2.2 x 10-6 s/m and a solute mass transfer rate of 1.5 x 10-6 m/s. Calculate the membrane area required for the RO system.
(a) A groundwater borehole at USM engineering campus contains 3000
mg/L of TDS. The flow is 0.32 m3 /s. The design TDS concentration of
the product water is below 400 mg/L. The net pressure is 40 atm. The
membrane manufacturer provides that the membrane has a water flux
rate coefficient of 2.2 x 10-6 s/m and a solute
x 10-6 m/s. Calculate the membrane area required for the RO system.
(B)
A water treatment at Nibong Tebal receiving a raw water contains a
concentration of 0.5 µg/m3 atrazine from Kerian River. In order to
comply with the drinking water quality guideline, the treatment plant
should reduce the concentration of Atrazine to 0.1 µg/L. If the dosing of
powdered activated carbon have been applied before the coagulation,
calculate the minimal dose of PAC in mg/m3 .
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