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HOW THE ENVIROSERVER® WORKS

Stage 1, Primary Clarification

Wastewater Influent from the house is gravity fed into the first chamber of the system. In the first chamber, settling of the sludge and solids occurs. The primary clarified wastewater overflows into the second chamber of the system.

Stage 2, Biological Organic Removal

In the second chamber the wastewater is aerated using a high-efficiency low-pressure blower and a medium-bubble diffuser assembly. The diffuser assembly is custom designed to ensure maximum oxygen transfer and optimum mixing of dissolved substrates and oxygen. Furthermore, the mixing ensures that the solids remain suspended within the reactor and that the biomedia does not clog. The aeration promotes the growth of aerobic microorganisms, which convert and remove biodegradable organic matter. (The organics removed by the aerobic process are the constituents that are measured in the CBOD5 test.)

Stage 3, Biological Ammonia Conversion (Nitrification)

The treated wastewater, which is now low in carbon but high in ammonia, flows into the third chamber of the system. This chamber is aerated in the same way as the second chamber. The combination of low carbon content and high ammonia and high oxygen levels in this chamber promotes the growth of nitrifying microorganisms (Nitrosomonas and Nitrobacter). The nitrifying microorganisms convert ammonia to nitrates utilizing the oxygen in the wastewater.

To optimize the contact time and the mean cell residence time, the EnviroServer® utilizes a biomedia in the aeration sections. This plastic media is used to supply a support structure for the establishment of a resident biofilm and is specifically developed for optimized biological growth without clogging. The main advantage is that the biomass is attached to the biomedia and does not get flushed out at high input flow rates. The biomedia also enhances the nitrification process, which requires a larger population of organisms due to the lower metabolic rate of the nitrifying bacteria.

Stage 4, Clarification

The two-stage aerobically treated wastewater, which is now high in nitrates but low in carbon (low in CBOD5) flows into the fourth chamber of the system, where clarification and settling of the suspended solids take place.

Stage 5, Nitrate Removal (De-Nitrification)

To promote denitrification, and to remove the accumulated biomass, the wastewater is recirculated from the fourth chamber back to the first chamber. Denitrification is facilitated by this recirculation because the bacteria in the first anoxic chamber use the oxygen from the nitrate molecule in their metabolic process, with nitrogen being released as gas in the reaction. Without recirculation, the small amount of carbon available in the secondary tank would limit the denitrification.

Stage 6, Solids Removal and Destruction

The recirculation of the biomass prevents accumulation of the biomass in the clarification chamber, eliminating the need for periodic removal. Removing the accumulated biomass also helps to ensure optimum clarifier performance resulting in an effluent with low suspended solids. The transfer of the biomass to the first compartment ensures a large vital population of microorganisms for the organic and nitrogen removal processes in the second and third chambers. The recirculation process also benefits the system in times of low loading such as vacation periods. When the water is recirculated, it carries nutrients from the first chamber into the second chamber. Thus the available nutrients are utilized to sustain the population as long as possible. In normal operation this keeps sludge build up to a minimum by helping to break up and dissolve the solids, making the nutrients available for the microorganisms.

To control the build-up of sludge (dead biomass) in the system, sludge is periodically pumped from the bottom of the first chamber. The sludge is filtered through a screen inside the Thermal Processor and the water drains back to the first chamber. The Thermal Processor employs a unique thermal decomposition process to dehydrate, pyrolize and gasify the sludge. The exhaust is routed back into the liquid in the first compartment for scrubbing of the gasses. The ash from the thermal decomposition process is flushed out with the wastewater and leaves the system as dissolved and suspended solids. This feature eliminates the requirement for periodic removal of solids by pumping.

Stage 7, Disinfection

As the clarified water leaves the system, it passes through a disinfection unit, which kills the total and fecal coliform. The effluent is now ready for subsurface discharge.

Computer Control System

The EnviroServer® System is controlled by a custom computer control system. The computer monitors the electrical and mechanical components critical to the treatment processes. In the event of malfunction the computer contacts our remote monitoring facilities to report the fault. It also activates a local visible and audible alarm. The computer can also be queried remotely to determine the operating status of the system and assist in troubleshooting.

SYSTEM OVERVIEW

SCIENTIFIC AND ENGINEERING PRINCIPLES

The design of the EnviroServer is based on well-known engineering principles in the wastewater field applied in a new way. The system can be described as a hybrid fixed film-suspended growth extended aeration wastewater treatment system with a two stage biological process to optimize denitrification. One main advantage is the capability of removing sludge or dead biomass, which may clog or lower the efficiency of the system. The removal of sludge is done by the Thermal Processor. The Thermal Processor is a patented system1,2 that has been optimized to fit the EnviroServer System by the in-house R&D Department (records are available upon request).

The EnviroServer removes nitrogen using biological processes, such as ammonification followed by nitrification and denitrification. In ammonification, organic nitrogen (proteins and peptides) is decomposed to ammonia or ammonium ions. About 80% of the ammonification take place in the sewer lines before the wastewater enters the EnviroServer and the balance is ammonified in the first compartment. The ammonification is followed by nitrification. In nitrification, ammonia is removed biologically by a two-step process in which the ammonia is oxidized to nitrite, and the nitrite is oxidized to nitrate according to the following formulas3, 8, 13:

NH3 + O2 + CO2 + HCO3

- + Microbes New Microbes + NO2- + H+ +H2O

NO2

- + O2 + CO2 + HCO3- + Microbes New Microbes + NO3

-

The nitrification is affected by temperature, pH, dissolved oxygen (DO), alkalinity, contact time, and mean cell residence time4, 6, 13. The temperature and pH are not specifically controlled in the EnviroServer. The temperature is normally kept between 70 to 90°F by the microbial activity and some added heat from the air compressor. The pH is typically between 7 and 8.5 in the EnviroServer, since no chemicals are added to any of the compartments. Therefore, both the temperature and the pH fall well within the optimum range for nitrification.

An air compressor continuously supplies air to the two aerobic compartments in the tank to keep the dissolved oxygen above 3 mg/l. The conversion of ammonia to nitrates requires 4.57 kg of oxygen per kg of ammonia converted12, 17, 18.

Nitrate formed during nitrification is removed by heterotrophic organisms under anaerobic conditions through conversion to gaseous nitrogen species through denitrification13, 17, 18. In this process, nitrate first is reduced to nitrite and then to nitric oxide (NO), followed by nitrous oxide (N2O) and nitrogen gas (N2). This process requires a carbon source4. In the EnviroServer, the wastewater exiting the two-stage aerobic section, which is high in nitrates and low in carbon, is recirculated back to the first anaerobic compartment where it mixes with the raw wastewater, which is high in carbon.

The biodegradable organic carbon, that causes CBOD5, is converted to carbon dioxide and settleable biomass by heterotrophic organisms13. These microorganisms require oxygen. The process is referred to as aerobic digestion and can be expressed by the following equation7, 12:

MicrobesOrganic Matter + O2 + Nutrients New Microbes + CO2 + H2O

The aerobic digestion takes place in the second compartment of the EnviroServer. The EnviroServer utilizes a combination of an attached and suspended growth process. The attached film is growing on a biomedia and the suspended growth is created by mixing and recirculation of sludge. This combination results in a treatment efficiency that exceeds the individual performance of an attached or suspended growth process.

The aerobic digestion of organic matter is mainly affected by dissolved oxygen, pH, temperature, mixing, and solids retention time. The design of the EnviroServer optimizes these parameters for maximum CBOD5 and nitrogen removal5, 6, 7, 10.

The fourth compartment is the clarifier where final settling of suspended solids and clarification of the effluent is taking place. The tank design is optimized with respect to the following parameters: waste water flow rate, sludge settling rate, sludge removal, surface area, tank depth, overflow rate, inlet device, and tank configuration9. It is designed for optimum performance without any chemical addition. The settled solids are recirculated back to the first compartment.

The fourth compartment is followed by a custom designed disinfection unit. The disinfection consists of a chlorinator and disinfection contact chamber15, 16. The contact chamber also serves as a reservoir for water re-use, such as irrigation. The disinfection mechanisms with chlorine are not entirely known. The theories include oxidation, reactions with chlorine, protein precipitation, modification of cell wall permeability, and hydrolysis and mechanical disruption16. The germicidal efficiency of disinfection, as measured by bacterial survival, depends primarily on the concentration of chlorine added and the contact time. The disinfection contact compartment in the EnviroServer is designed for a minimum of 90 minutes effluent residence time. The chlorinator is designed to ensure a 0.5 ppm level of free chlorine in the contact chamber. Testing has shown that at 0.5 ppm free chlorine, the coliform is maintained below 2.2 CFU/100 ml. This dosage will have a minimum effect on pH, which will stay between 6 and 9.

References

1. Axelrod, B., “Waste Treatment Device and Method Using Microwaves”, Patent No. 4,631,133 (1986).

2. Shades, R.C., et al, “Waste Treatment Device and Method Employing the Same”, Patent Pending, Filed: July, 1997 Amended: Jan, 1998.

3. “Design of Municipal Wastewater Treatment Plants Volume I”, WEF Manual of Practice No. 8/ASCE Manual and Report on Engineering Practice No. 76 (1992).

4. “Design of Municipal Wastewater Treatment Plants Volume II”, WEF Manual of Practice No. 8/ASCE Manual and Report on Engineering Practice No. 76 (1992).

5. “Operation of Municipal Wastewater Treatment Plants Volume I”, Manual of Practice No. 11 Fifth Ed., WEF (1996).

6. “Operation of Municipal Wastewater Treatment Plants Volume II”, Manual of Practice No. 11 Fifth Ed., WEF (1996).

7. “Operation of Municipal Wastewater Treatment Plants Volume III”, Manual of Practice No. 11 Fifth Ed., WEF (1996).

8. “Nutrient Control”, Manual of Practice No. FD-7, Water Pollution Control Federation, Washington, D.C. (1983).

9. “Clarifier Design”, Manual of Practice FD-8, Water Pollution Control Federation, Washington, D.C. (1985).

10. “Wastewater Biology: The Microlife”, A Special Publication, WEF, Alexandria, Virginia (1990).

11. “Water Reuse”, Manual of Practice SM-3, Second Ed., Water Pollution Control Federation, Alexandria, Virginia (1989).

12. “Aeration”, WEF Manual of Practice FD-13/ASCE Manuals and Reports on Engineering Practice No. 63 (1996).

13. “Wastewater Biology: The Life Process”, A Special Publication, WEF, Alexandria, Virginia (1994).

14. “Treatment Process Digest”, Water Environment Federation Digest Series, WEF, Alexandria, Virginia (1993).

15. “Wastewater Disinfection”, Manual of Practice FD-10, WEF, Alexandria, Virginia (1996).

16. “Comparison of UV Irradiation to Chlorination: Guidance for Achieving Optimal UV Performance”, Project 91-WWD-1, Water Environment Research Foundation, Alexandria, Virginia (1995).

17. “Wastewater Engineering: Treatment, Disposal, Reuse”, Third Edition, Metcalf and Eddy, Inc. (1991)

18. Crites, R. and Tchobanoglous, G., “Small and Decentralized Wastewater Management Systems”, McGraw-Hill (1998).

PROCESS DESCRIPTION

Figure 1 shows a process flow diagram of the EnviroServer System. Wastewater Influent (1) from the house is gravity fed into the first compartment (Primary Clarifier). In the first chamber, settling of the sludge and solids occurs. The primary clarified wastewater overflows into the second compartment (First Aerated Compartment). In the second compartment the wastewater is aerated using a high-efficiency low-pressure air compressor and a membrane air diffuser assembly (6). The diffuser assembly is custom designed to ensure maximum oxygen transfer and optimum mixing of dissolved substrates and oxygen. Furthermore, the mixing ensures that the solids remain suspended within the reactor and that the biomedia does not clog. The aeration promotes growth of aerobic microorganisms, which convert and remove biodegradable organic matter. (The organics removed by the aerobic process are the constituents that are measured in the CBOD5 test.)

The treated wastewater, which is now low in carbon but high in ammonia, overflows into the third compartment (Second Aerated Compartment). This chamber is aerated in the same way as the First Aerated Compartment. The oxygen rich atmosphere in this chamber promotes the growth of nitrifying microorganisms (Nitrosomonas and Nitrobacter), since it is low in carbon and high in ammonia. The nitrifying microorganisms convert ammonia to nitrates utilizing the oxygen in the wastewater.

To optimize the contact time and the mean cell residence time, the EnviroServer utilizes a biomedia in the aerated sections. This plastic media is used to supply a support structure for the establishment of a resident biofilm and is specifically developed for optimized biological growth without clogging. The main advantage is that the biomass is attached to the biomedia and will not get flushed out at high input flow rates. This will favor the nitrification process, which is significantly slower than the organic removal.

The two-stage aerobically treated wastewater, which is now high in nitrates but low in carbon (low in CBOD5) overflows into the fourth compartment (Secondary Clarifier), where final clarification and settling of the suspended solids take place.

To promote denitrification, and to remove the accumulated biomass, the wastewater is recirculated (2) by a sludge recycle pump from the fourth compartment back to the first anaerobic compartment. A volume equal to eight percent of the systems rated capacity is recirculated each hour. Denitrification is facilitated by this recirculation because the bacteria in the first anaerobic compartment use the oxygen from the nitrate molecule in their metabolic process, with nitrogen being released as gas in the reaction. Without recirculation, the small amount of carbon available in the fourth compartment would limit the denitrification.

Furthermore, the recirculation of the biomass prevents accumulation of the biomass in the final Clarifier, eliminating the need for periodic removal. Removing the accumulated biomass also helps to ensure optimum clarifier performance resulting in an effluent with low suspended solids. The transfer of the biomass to the first compartment ensures a large vital population of microorganisms for the organic and nitrogen removal processes.

The recirculation process also benefits the system in times of low loading such as vacation periods. When the water is recirculated, it carries nutrients from the first compartment into the second compartment. Thus the available nutrients are utilized to sustain the population as long as possible. In normal operation this keeps sludge build up to a minimum by helping to break up and dissolve the solids, making the nutrients available for the microorganisms.

The clarified water leaves the treatment system through a submerged weir, and passes through a disinfection unit (Chlorinator), into the final Effluent Storage compartment. The effluent storage compartment also serves as a disinfection contact chamber to ensure complete kill of all total and fecal coliform bacteria. The effluent is now ready for surface or sub-surface discharge (5).

Once a week, the sludge pump is pumping sludge (3) from the bottom of the first compartment to the Thermal Processor to control the build-up of sludge (dead biomass) in the system. The sludge is filtered through a stainless steel perforated shelf inside the Thermal Processor and the water (4) drains back to the first compartment. After a set number of pump cycles a sludge cake is formed on the shelf, at that time the control system initiates the thermal decomposition cycle, which includes drying, heating, gasification and pyrolysis of the sludge at controlled temperatures. The controlled temperatures in combination with forced air results in minimum emissions. The exhaust gas (7) is forced back into the water in the first compartment which further scrubs the gases to remove any remaining particulates, gas products, and potential odor before it is vented together with the air in the tank through the normal vent at the roof of the house. The ash is flushed out with the wastewater (4) and leaves the system as dissolved and suspended solids as shown in the mass balance.

The EnviroServer System is controlled by a custom computer control system. The computer is capable of detecting failures of electrical and mechanical components critical to the treatment processes and delivering signals both remotely via a modem connection and locally with a visible and audible alarm.

Table 1 and 2 shows the material balances for the EnviroServer system based on the streams shown in Figure 1. Table 3 identifies the resource usage for the system.

Figure 1. EnviroServer® Wastewater Treatment System

Table 1. Material Balance for a 600 Gallon per Day System

Stream 1 2 3 4 5 6 7Influent Aerobically

Treated Wastewater

Settled Sludge

Mechanically Filtered Sludge

Disinfected & Clarified

Effluent

Air Exhaust

Flow rate, gal/day 600 1,200 801 801 600 - -Flow rate cft/day - - - - - 5,280 480Temperature °F 80 80 80 80 80 90 300Suspended Solids mg/l 250 50 500 200 <10 - -CBOD5 mg/l 200 <20 >200 100 <10Total Nitrogen mg/l 50 30 - - <10Carbon Monoxide ppm - - - - - - <50Oxygen % - - - - - 20.9 >15Ash mg/l - - - 100 <1

Table 2. Material Balance for a 1200 Gallon per Day System


Treated Wastewater

Settled Sludge



Effluent

Air Exhaust

Flow rate, gal/day 1200 2,400 801 802 1200 - -Flow rate cft/day - - - - - 11,040 480Temperature °F 80 80 80 80 80 90 300Suspended Solids mg/l 250 50 500 200 <10 - -CBOD5 mg/l 200 <20 >200 100 <10Total Nitrogen mg/l 50 30 - - <10Carbon Monoxide ppm - - - - - - <50Oxygen % - - - - - 20.9 >15Ash mg/l - - - 100 <1 - -

Table3. Material Balance for a 1500 Gallon per Day System


Treated Wastewater

Settled Sludge



Effluent

Air Exhaust

Flow rate, gal/day 1500 3,000 801 802 1500 - -Flow rate cft/day - - - - - 11,040 480Temperature °F 80 80 80 80 80 90 300Suspended Solids mg/l 250 50 500 200 <10 - -CBOD5 mg/l 200 <20 >200 100 <10Total Nitrogen mg/l 50 30 - - <10Carbon Monoxide ppm - - - - - - <50Oxygen % - - - - - 20.9 >15Ash mg/l - - - 100 <1 - -

Table 4. Resource Usage

600 gpd System 1200 gpd System 1500 gpd SystemPower Consumption2 kWh per day 5.8 11.0 12.5Chlorine Tablets (8 oz.) Quantity per month 6 - 10 12 – 20 20 – 25

1 Sludge is pumped once per week at specified flow rate.2 Sludge is pumped twice per week at specified flow rate.23 Note, power consumption includes effluent pump.

RANGE OF OPERATING CONDITIONS

Technology performance can be achieved when the EnviroServer System is properly installed in accordance with MicroSepTec’s Installation Manual and maintained with a Maintenance Service Contract. The two models are designed to process up to 600 gpd, 1200 gpd and 1500 gpd of wastewater.

The specified performance of the system depends upon the following influent parameters: 150-250 mg/l CBOD5, 150-250 mg/l TSS, 40-60 mg/l Total Nitrogen, and a Fecal Coliform below 1,000,000 CFU/100 ml.

The items below constitute representative example of items that should not be introduced to the EnviroServer. These items are broad categories that are intended to serve as examples and are by no means all-inclusive:

Toxic Chemicals Gasoline in any form Caustics Solvents Flammables Greases and Oils Feminine Napkins Baby Diapers

Benefits of the EnviroServer®

Sludge is destructed onsite - This eliminates the need to pump the system and haul the waste, saving the homeowner money over the life of the system. Reduces the load on the publicly owned treatment works where the pumped sludge must otherwise be transported.

Odor free with no messy or smelly filters to check or change.

Reduced size of dispersal field and need for “set aside” in selected markets- ideal for homeowners with limited area available for dispersal.

High quality effluent - can be installed in areas with environmental or ecological sensitivity. For example, areas where the water table is high or surfacing, the dispersal field is located close to groundwater, proximity to aquifer, including beaches, or poor soil conditions. In addition, Pennsylvania and Virginia have approved the system for direct discharge into rivers and streams.

Effluent can be used for sub-surface irrigation - reduces the demand for domestic quality water that would normally be used for irrigation. Saves the homeowner money and reduces the demand for precious natural resources.

Denitrified effluent - particularly benefits properties adjacent to lakes, streams, underground aquifiers or sensitive areas of the shoreline.

Using telemetry, the system is remotely monitored 24/7 by the company’s Performance Assurance center - gives homeowners and regulators peace of mind that any problem that may develop in the system will be diagnosed and resolved before becoming a bigger problem. Prevents contamination and pollution.

Administers record keeping and reporting of maintenance of the system - helpful to regulators who have a periodic inspection policy or who would like to have one if they had the resources to implement one. The regulators are moving in the direction of periodic inspections.

Conforming to EPA recommendation of routine maintenance performance schedule.

Helps regulators to administer programs for point of sale and change-in-use inspections - EPA recommendation.

Helps regulators administer program for scheduled reporting of completed maintenance of mechanical treatment components – voluntary EPA guideline.

EnviroServer® 600, 1200, 1500 GPD Data Sheet

SPECIFICATIONSCONSTITUENTS1 Raw Household

Sewage2 MicroSepTec Effluent

CBOD 200 mg/1 <10 mg/l

TOTAL NITROGEN 40 mg/l <10 mg/l

TOTAL SUSPENDED SOLIDS 300 mg/l <10 mg/lpH 7.5 7.5

FECAL COLIFORM1,000,000,000 –10,000,000,000

CFU/100ml<2.2 CFU/100ml

TANK DIMENSIONS: 600 GPD – 168” Length x 60” Diameter1200 GPD – 208” Length x 72” Diameter1500 GPD – 252” Length x 72” Diameter

POWER REQUIREMENTS: 220 VAC, 30AENERGY CONSUMPTION: 600 GPD – 180 KWH per month with effluent pump – 18.00 @

.10/KWH).)1200 GPD – 329 KWH per month with effluent pump - $32.90 @ .10/KWH).)1500 GPD – 371 KWH per month with effluent pump - $37.10 @ .10/KWH).)

CAPACITY: 600 gpd in a typical regulatory requirement of a 4 bedroom home1200 gpd in a typical regulatory requirement of an 8 bedroom home1500 gpd in a typical regulatory requirement of a 10 bedroom home

1. Values shown represent averages.2. These parameters represent typical household sewage

Parts Supplied by MicroSepTec

The following items are supplied by MicroSepTec as part of the EnviroServer System:

1. Water Processing Tank Assembly to include:

Fiberglass Tank - 1500 gallon tank for 600 gpd System- 2500 gallon tank for 1200 gpd System- 3400 gallon tank for 1500 gpd System

Sludge Pump Assembly Air Diffuser Assembly Recirculation Pump Assembly Risers Thermal Processor Assembly Tank Plumbing & Electrical fittings Disinfection Assembly Effluent Discharge Pump Assembly

2. Air Compressor Assembly to include:

Air Compressor- Two each for 600 gpd System- Two each for 1200 gpd System/1500 gpd System- Air Compressor Enclosure- Air Compressor Manifold Assembly

3. Controller Assembly to include:

Controller & EnclosureMain Power DisconnectCable HarnessesProtective Cable

Equipment Specifications for Main Components

Table 1 summarizes the equipment used for EnviroServer 600, 1200 and 1500. The specifications for the tanks, the air compressor, the sludge pump, the circulation pump, and the effluent exit pump are described on the following pages.

Table 1. Equipment for EnviroServer® 600, EnviroServer® 1200, and EnviroServer® 1500

EnviroSever 600 EnviroServer® 1200 EnviroServer® 1500

Tank Size 1,500 gal 2,554 gal 3,400 gal

Sludge Pump Grundfos SE40 Grundfos SE40 Grundfos SE40

Circulation Pump Grundfos SE40 Grundfos SE40 Grundfos SE40

Air Compressor 2 x Medo LA-80 2 x Medo LA-120 2 x Medo LA-120

Biomedia, 3½” BioRings with 32 ft2/ft3 of surface area

30 ft3 60 ft3 75 ft3

Air Distribution Devices 2 2 2

Thermal Processor Assembly

1 1 1

Control System 1 1 1

Disinfection Unit 1 1 1

Effluent Exit Pump Grundfos EF402 or Myers 2NFL51-8

Grundfos EF402 or Myers 2NFL51-8

Grundfos EF402 or Myers 2NFL51-8

EQUIPMENT SPECIFICATION

600 GPD Tank

Drawings: Available upon request

Type: Custom-made Fiberglass Tank with Five Compartments

Materials: Glass Fiber-Reinforced/Polyester

Construction: Prefabricated Septic Tank with Baffles between each compartment

Capacity: 1500 gallon

Dimensions: 168”(L) x 60”(Dia.) 4 x 24” diameter manholes

1200 GPD Tank







1500 GPD Tank







SLUDGE PUMP

Type: Grundfos SE40

Materials: See attached

Construction: Non-clog vortex design that will handle spherical solids up to 2”dia.

Performance: See attached pump curve

Electrical: 4/10 HP/115 Volts/60 Hertz/1625 rpm

CIRCULATION PUMP

Type: Grundfos SE40

Construction: Non-clog vortex design that will handle spherical solids up to 2”dia.

Electrical: 4/10 HP/115 Volts/60 Hertz/1625 rpm

EFFLUENT EXIT PUMP

Low Pressure Application

Drawings: N/A

Type: Grundfos EF402

Materials: See attached

Construction: Submersible


Electrical: 4/10 HP/115 Volts

High Pressure Application

Drawings: N/A

Type: Myers 2NFL51-8

Materials: Stainless Steel

Construction: Submersible


Electrical: 1/2 HP/115 Volts

AIR COMPRESSOR – 600 gpd

Drawings: See attached

Type: MEDO Brand Air Blower Model LA-80

Materials: N/A (waterproof, soundproof sealed case)

Construction: Linear-Motor-Driven Free Piston System

Performance: 2.8 CFM at 2.1 psig discharge pressure (see attached fan curve)

Electrical: 120 Volts/60 Hertz/80 Watts

AIR COMPRESSOR – 1200/1500 gpd

Drawings: See attached

Type: MEDO Brand Air Blower Model LA-120

Materials: N/A (waterproof, soundproof sealed case)

Construction: Linear-Motor-Driven Free Piston System

Performance: 4.2 CFM at 2.6 psig discharge pressure (see attached fan curve)

Electrical: 120 Volts/60 Hertz/118 Watts

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