Aquarobic - Model Mini-Plant Series - Sequencing Batch Reactor (SBR)
The Mini-Plant series (Sequencing Batch Reactor-SBR) treats wastewater flows from 500 to 5,000 gallons per day. The Mini-Plant tank is sized to hold a volume of three (3) times the daily wastewater flow, providing 100% or more overload capacity. Mini-Plant units have undergone stress-loading tests and performed consistently better than most 'secondary' wastewater treatment plants.
Product Details
Advanced 'tertiary' treatment is achieved through our Mini-Plant systems' add-on components. The unique aerobic up-flow and re-circulating filters enable a higher degree of treated effluent (less than 5 mg/L BOD & SS - Class 1A). Disinfection or nitrate/phosphorus removal components are also available. Outstanding test results were obtained after comprehensive six (6) months testing programs at a national testing service both for the Aquarobic International, Inc. Mini-Plant and the Mini-Plant and filter system. The results exceeded all the requirements of the highest rating and have been certified as such under national and international standards. Test results available upon request.
Mini-Plant units are sold completely factory assembled in fiberglass tanks and ready to install, or as a 'kit' allowing the system to be installed onto pre-fabricated or locally constructed concrete tanks. Normal operating cycle's power consumption for a 600 GPD is 8.5 kilowatts per day.
Aquarobic Mini-Plant Process Description
The Mini-Plant is a Sequential Batch Reactor (SBR) system, controlled by a factory set programmer which times aeration and settling functions. A batch of treated effluent is discharged to the disposal area once a day.
The program is set to aerate for 20 hours, 6:00 A.M until 2 A.M., supplying the wastewater with fine diffused air. Air diffusers create thousands of fine air bubbles supplying oxygen for the aerobic digestion process. At 2:00 A.M. the program turns the compressor off and a 3 hour quiescent settling period follows. During this period, the aeration tank becomes the settling tank and the batch process uses this time to separate the solids from the clear supernatant.
After the Mini-Plant's 3 hours of perfectly quiescent settling period, the clear supernatant (effluent) is discharged (5:00 A.M. to 6:00 A.M.) to the disposal area, solids are retained. The Mini-Plant begins the new day's cycle, aerating to further digest the retained organic solids and the incoming wastewater. The Mini-Plant has three main sections; the control panel, the manway and the tank with its in tank components.
Aquarobic Mini-Plant Components
- Manways:
Manufactured from heavy fiberglass reinforced polyester. They protect and provide access to the air compressors, electrical junction boxes and the mechanical connections. Inside the manway, energy efficient ring type air compressors are mounted. The level sensors and submersible pump are also wired to the junction box. - Air compressor(s):
Regenerating energy efficient ring type supplying up to 52 cubic feet of air per minute to the diffusers operating on 230 volts, 60 Hz. variable hp./ amps depending on load required results.
- Control panel:
The panel box is both UL and CSA approved type 3 enclosure suitable for outdoor / indoor mounting. It contains contactors, motor starters, program timer, control relays, alarm buzzer, and junction block. A separate circuit breaker load center panel is mounted onto the bottom of the Aquarobic control panel. The load center panel is UL listed with a main ratings 120 / 240 / Volts AC. 3-wire 125 Amp. With 8 poles, normally with a 20 amp double breaker 240 volts for the blower and pump power, a 15 amp single phase breaker 115 volts for the control circuit and another 15 amp single phase breaker 115 volts for the alarm circuit.A 230-volts single-phase supply line (3 wires with ground # 10 gage.) from the main power source. A control panel schematic guides the qualified serviceman or electrician to troubleshoot any part of the system. A visual, audible, and remote signal are provided to monitor and ensure continuous proper operation.
Aquarobic Mini-Plant Add On Components
Re-circulating filter:
The filter is installed in a separate fiberglass tank or in a “kit' form to install onto a locally built two compartment concrete tank. The effluent from the Mini-Plant is pumped into a 4' distribution manifold at the top of the filter material (on the bottom, 12' to 16' of 2' washed stone topped off with 24' to 30' of 3/4' washed stone). The effluent flows slowly down through the filter media where it is collected by another 4' perforated pipe manifold at the bottom of the filter material and flows to the center 18' PVC re-circulating filter pump well. A pre-determined volume allowance in the center well activates the re-circulating pump switch, which starts to pump the liquid around and back into the top 4' perforated manifold for continuous filtering, dispersing the daily amount slowly.
The filter tank is designed to hold the daily wastewater flow from the Mini-Plant, in the empty space above the filter, and in the filter media.
The UV light is always "on" intensifying the bacte...
The UV light is always 'on' intensifying the bacterial kill. Because the effluent is discharged once per day, treatment time can be extended to further polish the effluent. The re-circulating pump line’s restricting valve can be adjusted to create back-pressure on the line forcing some of the re-circulating liquid out through a small pipe that leads to the UV disinfection system. The restriction valve determines the effluent amount circulating in the disinfection area. Depending on the size of the unit, an adjustment to affect the flow of less than one gallon per minute can increase the treatment time and efficiency of the UV.
Advantages of the Aquarobic Mini-plant™ Up-flow or Re-circulating Filter Units:
- Tertiary treatment producing high quality effluent. (Less than 5-5 BOD5 and Suspended Solids (SS.)
- The entire operation is automatically programmed for the specified hydraulic flow pattern of each application.
Spin Clear Filters
- Plastic Spin Clean - Available in 3/4', 1', 1 1/2', and 2' sizes with unique self-cleaning spinning action that cleans the stainless steel screens even under the most severe conditions. Maximum 150 PSI pressure rating.
- Steel Spin Clean - 2' through 12' epoxy-coated carbon steel, with sintered stainless steel screens. Spin cleaning action ensures efficient handling of the most difficult filtration problems agriculture, industrial, wastewater and large turf systems operating at 100 to 2800 GPM.
- T Filter - Low profile design with black or clear debris basin, having a 3/4' MPT drain with cap to suit a wide range of applications.
- Screens - Replacement screens in appropriate mesh sizes are available for all API filters or Aqua O2 Wastewater Treatment Systems, Inc. The Mini-Plant uses a 50 -micron filter.
Aquarobic Mini-Plant System Operation
The Mini-Plant is a Sequential Batch Reactor (SBR) system programmed by a factory set timer, which regulates aeration, settling and pump functions. The system discharges a batch of aerobically (highly treated effluent averaging 7 BOD & 11 SS) through a forward flush 100 micron spin filter. The spin filter further reduces the suspended solids to less than 10 ml/l, prior to discharge to the drip irrigation system.
The Aquarobic Mini-Plant program aerates for 20 ho...
The Aquarobic Mini-Plant program aerates for 20 hours a day, supplying the wastewater with fine diffused air from 6 A.M. until 2 A.M. the following morning. At 2 A.M. the program turns off the compressor and a 3 hour quiescent settling period follows. During this period, the aeration tank becomes the settling tank (clarifier) and the batch process uses this time to separate the solids from the clear supernatant.
After the Mini-Plant's perfectly quiescent 3 hours settling period, the clear supernatant (effluent) is discharged (8 minutes 'on' and 2 minutes 'off' 5 a.m. to 6 a.m.) to the spin filter, further polishing prior to passing through to the K valve and into one of the drip irrigation zones. During the 2 minute 'off' period, the K valve switches to the next zone. The process repeats until the low water float switch turns the effluent pump 'off' or the one-hour period expires. The tank capacity is always three times the daily wastewater flow.
The Aquarobic International, Inc. / Clearwater dri...
The Aquarobic International, Inc. / Clearwater drip system forward flushes the spin filter while the pump is activated. Each zone has a 15-pound spring-loaded check valve at the return manifold; as the zone becomes pressurized the check valve opens allowing a continuous forward flushing of the zone back to the front of the Mini-Plant tank, for the remaining 8-minute 'on' cycle.
The program restarts the daily cycle which further digests both the retained organic solids and incoming wastewater.
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