Western Water Products

SITE MAP

1.0 Sewer Discharge System General Specifications: Model #AGOS-012 with OPTIONAL Hopper Bottom Pit and an Independent Sludge Removal System and Output Pumping Station included.

1.01 Performance: The above ground oil/water separator sewer discharge system shall be a minimum 3-stage system sized for a flow rate capable of 0-12 GPM. The system shall be capable of continuously removing free floating and emulsified oils, grease, heavy dirt and sand from water prior to discharge to sewer typically found in industrial applications such as parts washing, engine degreasing, floor cleaning, etc.

1.02 Water Collection: Water shall be collected in a below ground sump. Three common types of sumps may be used.

1) A small sump (commonly called a sand trap): A sump measuring 24" square x 24" deep is the smallest sump that can be used. When using a small sump all the water, dirt and other contaminants will be pump out of the sump and therefore a cone or hopper bottom pretreatment tank at least 100 gallons in size must be used.. This will also require the use of a second transfer pump.

2) Multi-compartment clarifiers: 2 or 3 stage clarifiers will provide adequate underground storage and also assist in removing free floating oils. The water transfer pump should be located in the final stage of the clarifier. Clarifiers tend to build up with dirt and must be pumped out regularly.

3) The preferred method is to utilize a "Hopper Bottom Pit" described below. The pit can be either located in the center of the wash pad as the primary sump or off to the side after the water has gone through a small sump first.
If the hopper bottom pit is selected it shall consist of at least a single pit which shall be a minimum size of 36" square x 54" deep and shall be constructed with a "Hopper Bottom" which shall allow for the placement of an OPTIONAL independent sludge removal pump (described in section 1.02.01 below) to facilitate the removal of sludge from the pit to an above ground mud hopper (described in section 1.02.03 below) for easy disposal. The sump shall either be cast out of concrete or, as an option, a WaterCycle #HBP, preformed polyethylene pit, may be used.

1.02.01 OPTIONAL Independent Sludge Pump: The Hopper Bottom Pit shall allow for the placement of an independent sludge removal pump to facilitate the removal of sludge from the bottom of the pit to an above ground mud hopper for easy disposal. The pump shall be at least 1/3 HP in size.

1.02.02 OPTIONAL Sludge Pump Control: The independent sludge removal pump shall be controlled by a separate timing control which is timed to come on periodically to remove sludge from the pit and place it into an above ground mud hopper for easy disposal.

1.02.03 OPTIONAL Mud Hopper: The mud hopper shall come equipped with a device for slowly decanting off the water and returning it to the pit while allowing the sludge to settle out in the hopper. The size of the mud hopper shall be 96 gallons minimum and shall be connected to feed and return stub-ups from the pit via 2" flexible spa hose with quick disconnect fittings.

1.02.04 Pit to Oil Water Separator Water Transfer Pump: A separate water transfer pump shall be located in the pit to transfer water to the above ground oil/water separator console. The transfer pump shall be housed within a 650-micron filtering barrel, which is designed to filter out debris and thereby avoid plugging the pump.

1.02.05 Transfer Pump Control: The water transfer pump shall be operated by a separate control circuit (115 Volt, 20 amp. outdoor rated GFI) via a piggy back float switch located in the pit when there is sufficient water to operate. The purpose of this pump is to positively feed water to the above ground oil/water separator console to avoid loosing prime in the line commonly associated with above ground suction pumps and foot valves. When the pit has sufficient water to operate, the transfer pump shall energize and supply water to the system console.

1.03 Above Ground Oil Water Separator Console Operation: The above ground oil/water separator console shall consist of 3-stages with a minimum 6 separate chambers for the separation and removal of oil, grease and floating solids as described herewith.

1.03.01 Operation--Stage 1: When the water reaches the system console, it shall pass through a check valve and then through a flow regulator. Water shall then enter the bottom of the first of two oil coalescing tanks and slowly percolate upward through a minimum of 750 square feet of oil coalescing plates. This slow moving process shall enhance dirt separation, and the dirt that drops shall fall to the floor of the tank. As the oily water gently flows upward, free oil droplets shall collect on the oleophilic (oil attracting) plates, and as these droplets join together, they shall form an oil slick that will release itself from the coalescing plates and float to the surface for removal from the tank.

1.03.02 Operation--Stage 2: After the water reaches the top of the first chamber, it shall then pass through to the second chamber of similar design and shall flow downward through an identical coalescing chamber which shall add a minimum of another 750 square feet of coalescing plates--thereby doubling the effect of the first section of the tank.

1.03.02.01 Oil Coalescing Plates: The oil coalescing plates shall be semi-sinusoidal in shape, shall be hung in the tank in a vertical-inclined position, shall be manufactured of an oleophilic material and shall be spaced approximately 1" apart to maximize both oil coalescing and water stilling characteristics inherent in the design. The minimum size of each of the first two chambers shall be 18" x 36" x 72" high.
The coalescing plates shall be capable of causing free floating oil to float to the surface of the water of these first two tanks where it can be removed through passive techniques thereby eliminating the need for rotating oil skimming wheels or drums. Passive oil skimming techniques shall consist of either oil absorption pads, periodic bleed-off through a manual valve or both. (As an option, periodic bleed-off of oily water may be diverted into the mud/oil hopper or a separate oil retention barrel, where the oil can be absorbed from the water using disposable oil pillows, and the water can be returned to the pit.)

1.03.03 Operation--Stage 3: Water shall next pass by gravity from the oil coalescing tanks through a level stabilizing anti-siphoning tube and into the first of four additional chambers containing oil adsorption to further scrub out emulsified oils remaining in the water stream. Each chamber shall be a minimum size of 18" x 18" x 36" high and shall be connected to each other in such a manner as to cause the maximum length of water flow through each chamber thereby maximizing the flow time of water passage through the filters.

1.03.03.01 Oil Adsorption Filters: The oil adsorption filter pads shall be manufactured of an oleophilic cellofoam with a minimum porosity of 20 cells per cubic inch and shall be manufactured of a material which is cleanable and reusable. Therefore, the design of the foam and filter chamber shall facilitate easy removal and cleaning of the filtering foam. cleaning shall consist of squeezing out the oil by using an optional press supplied with the system or the use of a pressure washer or by soaking.

1.03.03.02 Oil Absorption Filters: The oil absorption filters shall be manufactured of a disposable "pillow" or "pad" variety.

1.03.04 Stage 3 Water Level Stabilizing Pipe: Finally, for most application where gravity drains are available, cleaned water will exit the system console by gravity after passing through a level stabilizing anti-siphon pipe by gravity to an appropriate sewer connection.
1.03.05 OPTIONAL Output Pumping Station: As an option, when the site layout does not permit gravity flow of cleaned water from the oil water separator to the sewer drain and therefore must be pumped up hill, a pumping station shall be supplied. The pumping station shall consist of a water collection barrel with a pump and float. The barrel shall be a minimum of 30 gallons in size. The pump shall be sized to accommodate the rise height and length of piping run to reach the sewer drain (which will be specified with request for quotation).

1.04 Materials Specifications:

1.04.01 Filtration Console and Internal Tanks: The filtration console shall be manufactured of non-corrosive materials (re-enforced fiberglass). All internal tanks within the console shall be of vertical design, as opposed to horizontal tanks, standing in an upright position to minimize their footprint and shall have either a conical hopper bottom shape to facilitate the easy purging of sludge from each tank using a manually operated flush valve located at the bottom of each tank section. This will eliminate the need to take the system apart regularly to clean out the buildup of unwanted sludge. All internal piping shall be manufactured of PVC.

1.04.02 Electrical Panels: Any electrical panels supplied with the equipment shall be NEMA IV construction and shall be built to UL listed specifications. Power required to operate shall be 1 phase, 60 hertz, 115 volts AC, 20 amps (outdoor rated GFI).
1.04.03 Pumps and Motors: Pumps and motors must be designed to the latest in NEMA Standards. They are to be properly housed and protected within the system to ensure that no contaminants enter the motor to shorten life. They shall utilize the latest in Class B insulation technologies and be built for severe environmental duty applications. They shall utilize non-regreasable ball bearings to minimize maintenance and ensure contamination free bearing life. They are to be built to NEMA Standards HGl-12.53.A and be UL recognized with approval per E-46145. All steel components are to be coated with rust inhibiting undercoat and an overcoat of durable enamel. All rotors are to be coated with a rust inhibitor and the motor must use non-hygroscopic Class B or better varnish impregnated windings. The motor is to be oversized so that it will not be taxed and to allow it to run cooler, draw less than nameplate amps and extend its life expectancy. The motor shall be rated to run continuously 24 hours a day, have CSA Approval and be batch tested for efficiency performance per I.E.E.E. 12A Method B.

1.04.03.01 Pumps: Pumps must be designed and built to handle the water quality being handled at each point in the system. They must also be sized to provide the proper flow and pressure demanded by each process in the system. Pumps must have proper seals and bearings and an efficient reliable proven impeller construction. All pumps shall have a ruggedly constructed high tensile strength housing suitable for the application. Pumps shall have a sealed lubrication system for the pump chamber with easy access to provide lubrication to the pumps' seal when necessary.

1.04.04 OPTIONAL Hydrocarbon Removal Enhancement and Disinfectant System: If required by the application, the primary disinfectant control system employed shall be an ozone injection control system, which will also enhance hydrocarbon removal.

1.04.05 OPTIONAL Plumbing Kit: When required, the system shall come complete with a Plumbing Start-Up Kit containing all elbows, tees, nipples and manual purge control valves necessary to install the equipment. Straight piping will be supplied at the site by the installer to complete the installation. All plumbing parts shall be schedule 80 PVC.

1.05 Operation and Instruction Manuals: The system shall come with an instruction manual complete with a description of operation of the system as well as all major components, with a complete parts list showing manufacturer's names and parts numbers of all major buy out components and with a complete trouble shooting guide.

Western Water Products  
21756 Twinford Drive, Lake Forest, CA 92630
Tel: 949-581-8998
FAX: 949-768-4878
Internet: Webmaster@westernwater.com.