Reverse Osmosis Lab Report

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B. SHUTDOWN PROCEDURES:
1. Turn water supply pump selector switch to "off". The Heli-mixer will be running and should be left running. The chemical feed pump turns off automatically the moment the pump switch is turned off.
2. Refill chemical supply tanks.
3. Check chemical stock and order if necessary.
4. Check to make sure plant is secured before leaving the premise.
3-2.2 BACKWASH SYSTEM
Backwashing of the filter consists of up flow water wash followed by a rinse cycle. Backwashing is normally run automatically by setting the timer at predetermined interval to activate backwash cycle. The filter can also be manually backwashed. Backwashing of the filter is initiated when any of the following conditions occurs:
1. When filter effluent turbidity
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RO System remove salts microorganisms, and many high molecular weight organics. The key requirements of RO are a membrane, water under pressure and pre-filtration for removing suspended materials and carbon to remove chlorine. RO System is 100” x 45” x 74” in dimension and approximately weight around 2070 lbs. The system has 6 horizontal tubes in which contain a total of 18 4” x 40” membrane elements.

B. OPERATION
During normal service operation, water enters the bottom tube through a separate inlet distributor and flows sideway through the membrane. At the end of each tube, the water flow upward due to pressure to the next one. Eventually, the filtered water is collected at the outlet connection located at the end of the uppermost tube. C. SAMPLE POINTS
The RO System is provided with ten sample points to allow monitoring of its operation. Each sample may be drawn from the beginning and end of the tube.
4-1.3 GRANULAR ACTIVATED CARBON (GAC) FILTRATION SYSTEM
A. DESCRIPTION
GAC Filtration System consists of 2 Evoqua PV series absorbers that filled with 34 ft3 of GAC. GAC commonly used to treat natural organics, taste and odor, and synthetic organic chemicals in drinking

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