MULTI-FLO WASTEWATER TREATMENT SYSTEMS ENGINEERING MANUAL Revised April 6, 2010 NOTE: This manual is applicable for the use of the Enviro-Guard ENV-0.75 and Enviro-Guard ENV-0.75M. The Enviro-Guard is a Multi-Flo FTB-0.75 integrating one specific alternative for pretreatment and flow equalization. Designers may elect to provide different pre-treatment capacity and/or flow equalization techniques as may be needed to address specific design requirements.
MULTI-FLO WASTEWATER TREATMENT SYSTEMS DESIGN MANUAL Consolidated Treatment Systems, Inc. 1501 Commerce Center Drive Franklin, OH 45005 937-746-2727 www.multi-flo.
Multi-Flo Design Manual Revised August 1, 2002 Multi-Flo -Series Onsite Wastewater Treatment Systems Introduction Onsite wastewater treatment refers to the process of treating and disposing, dispersing, or recycling of wastewater at or near its point of generation. Historically, the phrase has been synonymous with “septic system” because that was the only design alternative available. With the advent of different design technologies, septic systems are just one of several available alternatives.
Multi-Flo Design Manual Revised August 1, 2002 Definitions The following definitions are critical to understanding the design, installation and operation of Multi-Flo units. These definitions have been purposely simplified so they can be understood by a wide range of readers. ANSI/NSF Standard 40: A performance certification standard intended for onsite wastewater treatment systems having a flow for between 400 and 1500 gpd (gallons per day) and a single point of discharge.
Multi-Flo Design Manual Revised August 1, 2002 Onsite Wastewater Treatment System. A device or combination of devices, which may include tanks, vessels, pumps, aerators, aerators, and other mechanical equipment, intended to treat and disperse wastewater at or near the point of generation. Pre-aeration: Aeration of wastewater to reduce the CBOD5 prior to discharge to the Multi-Flo unit.
Multi-Flo Design Manual Revised August 1, 2002 Table 2—Typical Domestic Wastewater Constituent Value CBOD5 100-300 mg/L TSS 100-350 mg/L FOG 30 mg/L TKN 60 mg/L Wastewater: Water generated as a result of human activities and containing feces, urine, blood, food byproducts, rinse water, laundry water, process water, and the like. Design Principles The goal of wastewater treatment is to return to the environment water that does not pose a public health or environmental threat.
Multi-Flo Design Manual Revised August 1, 2002 A pretreatment tank is larger than a trash trap, and its function is to capture and retain fats, oils, grease, and smaller solids such as dental floss. The capacity of a pretreatment tank is related to the flow from the occupancy. A flow equalization tank serves as a pretreatment tank, but its primary function is to retain wastewater for periodic dosing into the Multi-Flo. A pre-aeration tank is intended to provide additional oxidation.
Multi-Flo Design Manual Revised August 1, 2002 903 4" 1" 782 62" 58" 71" Figure 3—Multi-Flo FTB-0.75 93" 823 4" 68" 64" 78" Figure 4—Multi-Flo FTB-1.0 88" 63" 751 4" 1" 584 54" 135" Figure 5—Multi-Flo FTB-1.5 Every county of almost every state regulates the design, installation, operation, and maintenance of onsite wastewater treatment systems.
Multi-Flo Design Manual Revised August 1, 2002 flow. These parameters are based on number of patrons, square footage of retail space, restaurant seats, and other indicators of potential wastewater generation. Some codes may consider alternative values to establish flow, such as actual water use for similar facilities, but most codes are prescriptive in setting design flows. Listed in Table 4 are recommended sizing and components for single-family dwellings based on a design flow of 150 gpd/bedroom.
Multi-Flo Design Manual Revised August 1, 2002 3-BEDROOM RESIDENCE FLOW=450 GPD CONTROL PANEL WITH ALARMS LOCATE AS CONVENIENT INFLUENT WASTEWATER Figure 7 - Basic Multi-Flo Installation 3-BEDROOM RESIDENCE FLOW=450 GPD CONTROL PANEL WITH ALARMS LOCATE AS CONVENIENT PRETREATMENT TANK INFLUENT WASTEWATER Figure 8 - Multi-Flo Installation With Pre-Treatment 3-BEDROOM RESIDENCE FLOW=450 GPD CONTROL PANEL WITH DOSING TIMERS AND ALARMS, LOCATE AS CONVENIENT 1250 GAL SEPTIC/ PUMP TANK INFLUENT WASTEWA
Multi-Flo Design Manual Revised August 1, 2002 maximizing operational efficiency. Flow equalization functions by placing a pump on a timer that operates over a 24-hour cycle. The design flow will be divided into 48 or 96 equal doses, each of which will be discharged at 15-to-30 minute intervals, depending on the design. For example, a 500 gpd FTB-0.5 can receive 48 doses of about 10.4 gallons, each dose discharged at 30minute intervals. Flow equalization also provides the benefits of pretreatment.
Multi-Flo Design Manual Revised August 1, 2002 Design Flow and Loads Essential to proper design of commercial systems is a characterization of the flow and organic and solids loadings the occupancy will generate. These values may be obtained from several sources. If the facility is existing, meter readings may provide the answers. For new facilities, design values may already be established in plumbing or sanitary codes. Standard engineering texts also provide values.
Multi-Flo Design Manual Revised August 1, 2002 Table 6—Wastewater Flow and Organic Load Flow Gal/Unit/Day Type of Facility service or laundry) Travel Trailer or RV Park W/out water/sewer hook-up With water/sewer 75 gal/space 100 gal/space CBOD5 mg/L 400 400 CBOD5 lb/DAY/UNIT .25 lb/space .30 lb/space Four flows must be considered during the design: maximum month average daily flow, minimum monthly average daily flow, peak daily flow, and peak hourly flow.
Multi-Flo Design Manual Revised August 1, 2002 CONTROL PANEL KITCHEN WASTEWATER 1,000 GAL GREASE TRAP 4" PVC PIPE (TYP) 1250 GAL TANK/W PUMP & TIMER FTB-1.0 Figure 11—Plan View Showing Grease Trap Even if flow equalization and a grease trap are not required, a trash trap is recommended to capture fats, oil, grease, and other material from entering the MultiFlo. Such material includes, but is not limited to, tampons, sanitary napkins, cleansing pads, contraceptives, dental floss, and so forth.
Multi-Flo Design Manual Revised August 1, 2002 § Restaurants, Hospitals, Nursing Homes or Schools: Facilities having kitchen and laundry facilities require trash traps or grease traps. Contact your Multi-Flo representative for specific recommendations on the design of systems to serve the above types of facilities. § Facilities Served By Two Or More Multi-Flo Plants in Parallel: Provide a trash trap before a distribution box if the flow is to be split between two or more Multi-Flo units.
Multi-Flo Design Manual Revised August 1, 2002 Table 8—Recommended Multi-Flo Selections Recommended Size Average Daily Flow of Pretreatment-Tank Multi-Flo Unit(s) 0 – 500 gpd 501 – 600 gpd 601 – 750 gpd 751 – 1000 gpd 1001 – 1200 gpd 1201 – 1500 gpd 1501 – 2000 gpd 2001 – 2250 gpd 2251 – 3000 gpd 3001 – 4500 gpd 4501 – 6000 gpd 300 gallon 300 gallon 500 gallon 500 gallon 750 gallon 1000 gallon 1000 gallon 1000 gallon 1500 gallon 2000 gallon 2000 gallon FTB-0.5 FTB-0.6 FTB-0.75 FTB-1.0 Two FTB-0.6 FTB-1.
Multi-Flo Design Manual Revised August 1, 2002 5) Take the aerator out of the unit and clean it by lightly coating it with oil to prevent rusting. Store the aerator upright until the next season operation resumes. Upon resuming normal use, install the aerator, plug in the alarm, re-connect the unit at the breaker box, and seed the unit. Winterizing and start-up should be performed by an authorized Multi-Flo distributor to insure proper operation of the system.
Multi-Flo Design Manual Revised August 1, 2002 Design Examples Examples 1, 2, and 3: Residential Occupancies—Residential occupancies are generally designed based on the number of bedrooms, the daily flow assigned for each bedroom. Figure 12 shows typical layouts for single- and multiple-family dwellings. A trash trap is generally optional for single-family, owner-occupied dwellings. A trash trap is advisable for all rental property.
Multi-Flo Design Manual Revised August 1, 2002 Example 4: Commercial Occupancy, Office Buildings—Office buildings are designed based on the number of employers, frequenters, and based upon the presence of foodservice facilities. Figure 13 shows a layout of an office building that does not possess foodservice facilities. In designing a system for an office building, consideration must be made for the fact that the design flow may be generated within an 8-to-10 hour period.
Multi-Flo Design Manual Revised August 1, 2002 Example 5: Commercial Occupancy, Retail Shopping Center Without Foodservice—Retail space wastewater flow is generally calculated based on the number of employees and number of frequenters. Often, the number of frequenters is estimated from the area of retail space. Table 11—Example 5 Information Parameter Value (Retail Sales) 0.1 gal per sq. foot Hydraulic Loading (Office Space) 20-25 gal per employee Organic Loading Retail Sales: .
Multi-Flo Design Manual Revised August 1, 2002 Example 6: Commercial Occupancy, With Retail Shopping Plaza With Food Service/Laundry—It is important to provide adequate treatment (and pre-treatment) capacity for this type of facility. The initial design should indicate whether or not a food service or laundromat is proposed so that the Multi-Flo system can be properly designed.
Multi-Flo Design Manual Revised August 1, 2002 Example 7: Commercial Occupancy—Mobile Home Park—Mobile home parks are usually characterized by relatively low (100 – 200 gpd) wastewater flows from each mobile home. For this reason, it is advisable, as well as cost effective, to group several mobile homes on one Multi-Flo system. Table 13—Example 7 Information Parameter Value Hydraulic Loading 1400 gal./day 0.
Multi-Flo Design Manual Revised August 1, 2002 Example 8: Commercial Occupancy—Institution—Institutional facilities present several problems that must be addressed in the total design. Depending upon the type of facility involved, consideration must be given to possible food service, laundry facilities, showers, as well as high water usage and heavy peak flow periods.
WASTEWATER TREATMENT SYSTEMS PROCEDURES FOR ASSEMBLY AND INSTALLATION A Division of Consolidated Treatment Systems, Inc. 1501 Commerce Center Drive Franklin, OH 45005 Tel: 937-746-2727 Fax: 937-746-1446 www.multi-flo.
MULTI-FLO TANK COMPONENTS Fig. 1.1 ACCESS COVER PRIMARY SENSOR ASSY JUNCTION BOX SURGE BOWL SPRING RING RETAINER AIR TUBING OUTLET INLET UNION FILTER EXPANDER AERATOR POWER CORD AIR INTAKE PIPE AERATOR TYPICAL INSTALLATION (Cross Section) Fig. 1.
MULTI-FLO Procedures for Assembly and Installation Unless otherwise noted, the instructions within this manual may be used for all models (FTB 0.5, FTB 0.6, FTB 0.75, FTB 1.0 and FTB 1.5) of the MULTI-FLO wastewater treatment unit. The installation must comply with state and local regulations . SECTION 1.0 SITE PREPARATION 1.10 LOCATION 1.11 An accurate, detailed site plan is essential for successful installation of MULTI-FLO units.
1.61 Prepare the excavation. The opening should follow the area laid out in Section 1.51. Determine the required depth of the excavation based upon the elevation of the invert of the inlet sewer line (B) or the elevation of the finished grade (D), both of which should conform with the site plan. These dimensions are given for each model in Figure 1.3. NOTE: If the distance from the finish grade elevation to the bottom of the excavation exceeds the dimension (D) shown in Figure 1.
SECTION 2.0 INSTALLATION OF THE TANK 2.10 PLACING THE WASTEWATER TREATMENT UNIT INTO THE EXCAVATION (Refer to Fig. 2.1) 2.11 Rig the tank to lift. See unit specifications for actual weights. Except for the FTB 1.5, ropes can be attached to the inlet and outlet. Note: The FTB 1.5 has lifting hooks that must be used. 2.12 Slowly lower the tank into the hole, setting it carefully on the bottom. 2.
2.20 LEVELING THE WASTEWATER TREATMENT UNIT CAUTION: The system must be level. A tilted system will not work. 2.21 Place a level across the center tower in several directions. Adjust the tank until it is level. Leveling can be accomplished by shifting the bedding materials. Bedding materials must be evenly distributed to support the weight of the filled tank. DO NOT USE WEDGES OR OTHER DEVICES TO LEVEL THE TANK. 2.
2.46 If the final elevation of the MULTI-FLO is below grade so that surface water can enter the access opening of the plant, (1) a dosing pump can be installed prior to the MULTI-FLO; or (2) a riser (not exceeding 20”) can be provided on the MULTI-FLO. CAUTION: The addition of a riser will make access for service more difficult. 2.50 INSTALLATION OF FILTER BAGS AND EXPANDERS 2.51 Carefully place an expander into the bag and slide it to the bottom. Be careful not to rip or tear the bag.
SPRING FASTENERS INSTALLATION Fig. 2.2 Fig. 2.3 Fig. 2.4 2.70 AERATOR ASSEMBLY AND INSTALLATION 2.71 Remove all parts of the aerator from the box. This should include: aerator, legs (3), tee, 1/2” plug, 1/2” nipple, and the owner’s manual. 2.72 Screw the three (3) legs into the angular threaded holes in the bottom of the aerator cross-shaped piece. Make sure the leg is screwed all the way into the cross. 2.73 A plastic cap should be on the plain end of each leg. 2.
AERATOR ASSEMBLY Fig. 2.5 Foam Cap (Caplug) Air Tubing Primary Sensor Sensor Wires Union Plastic Tie Power Cord Air Pipe Aerator Tee 1/2" Plug Impeller 2.78 Attach the sensor assembly (Fig. 2.6) with the union to the air intake pipe. Tighten as much as possible by hand. NOTE: Be sure that the O ring seal is in the union half of the assembly. 2.79 Tie the aerator power cord to the air intake pipe with the plastic ties. CAUTION: Do not pull or stretch the power cord.
SENSOR ASSEMBLY Fig. 2.6 Air Tubing Power Cord Sensor Union Air Intake 2.81 Air Tubing Run the aerator power cord through the fittings as shown in figure 2.6 and into the junction box. CAUTION: Use care when running the power cord through the fittings. Damage to the cord will void the warranty. SECTION 3.0 ELECTRICAL CONNECTIONS (ALARM AND AERATOR) (Refer to specific sheet of direction for each model) SECTION 4.0 START-UP PROCEDURES 4.10 CHECKING THE AERATOR 4.
4.20 CHECKING THE FILTERS 4.21 Once the aerator is running, check each filter to see if any air bubbles are escaping under the filter ring. If so, remove the clips, re-adjust the filter and reinstall the clips. Some adjustment may be necessary to eliminate the bubbles. 4.30 CHECKING THE ALARM 4.31 With the power being supplied to the aerator and alarm, press the “test” button to activate the alarm. Note: YOU MUST HOLD THE TEST BUTTON DOWN FOR 6-to-7 SECONDS BEFORE THE ALARM ACTIVATES. 4.
5.11 The use of a pre-tank may cause septic odors to escape from the MULTI-FLO during periods of heavy usage (i.e., laundry). In these cases, a 4-inch Schedule 40 elbow can be installed on the inlet pipe to the MULTI-FLO. A 12-inch piece of pipe should be added to extend below the surface of the water (refer to Fig. 5.1). MULTI-FLO INLET DEVICE WHEN INSTALLED AFTER A PRE-TANK Fig. 5.1 4” Sch.
WASTEWATER TREATMENT SYSTEMS MANUAL FOR OPERATION, MAINTENANCE AND TROUBLE-SHOOTING A Division of Consolidated Trmt. Systems, Inc. 1501 Commerce Center Drive Franklin, OH 45005 Tel: 513-746-2727 Fax: 513-746-1446 www.consolidatedtreatment.
I. BASIC OPERATION AND MAINTENANCE REQUIREMENTS The following is a description of the normal maintenance required to insure continuous satisfactory operation of the M ULTI-FLO systems: START UP: Allow 6-to-8 weeks for sufficient bacteria to provide proper treatment in the M ULTI-FLO. During this period, there may be sudsing from to laundry wastes. Sudsing can be reduced by limiting the volume of laundry washed daily and by using a low-sudsing detergent.
SUMMARY OF MAINTENANCE REQUIREMENTS (Residential) Start up period............................................................6-to-8 weeks after sewage first enters unit Pumping frequency....................................................every 2-to-4 years Filter cleaning.............................................................every 2-to-4 years Aerator replacement ..................................................3-to-4 years Routine inspection frequency ....................................
II. EQUIPMENT AND MATERIAL ESSENTIAL FOR SERVICING MULTI-FLO UNITS 100’ garden hose with spray nozzle 100’ extension cord 1/3 hp submersible pump (little giant) with outlet made of flex pipe. Small utility pump with 1/2 - 5/8” garden hose (6’) on inlet and outlet (Teal model IP Simer Minivac Model M40 or equal.
III. SERVICING PROCEDURES Note: During all service procedures, be sure to observe good hygiene practices, including wearing gloves and proper hand washing. Step 1 Layout garden hose, wiping cloths, tools, electrical tape, utility pumps, and extension cord. Step 2 Turn off electrical power to M ULTI-FLO. Step 3 Remove lid to M ULTI-FLO. Check surge bowl for signs of high water or foaming. Check the area around the M ULTI~FLO for signs of previous overflow.
IV. PUMPING Bacteria and other microorganisms present in the wastewater use soluble organic material as a food source, converting it into more microorganisms (biomass), water, and carbon dioxide. As the colony matures, the numbers of microorganisms increase until they exceed the supply of organic material to maintain them. Due to the resulting starvation, organisms will begin to die and then be metabolized as new organisms are formed. Metabolized organisms reduce the overall solids (or “sludge”) volume.
5. Pump down the tank, until the liquid level is at the top of the aerator. This will leave sufficient seed material to allow start-up conditions to develop. 6. In areas with a high water table, immediately refill the M ULTI-FLO with clear water to prevent shifting or flotation. V. FILTER CLEANING Under normal operating conditions, the filters in the M ULTI-FLO do not require manual cleaning or backwashing.
VI. CLEANING THE HANGER FILTER PLATE AND WEIR Often, “pin floc” (less than 0.03 inches in diameter) forms as a result of over-oxidation of the sludge. Pin floc is observed in units with low hydraulic loads and long retention times, which allow digestion of the bacterial cells to occur. These fine, mostly inert, solids may pass through the filter fabric, especially if an inadequate biomat has formed on the filter surface. Pin floc may occur in new units though hydraulic surges (laundry, showers, etc.
6. Change aerators and replace in the M ULTI-FLO by following the above procedure in reverse. VIII. ALARM REPLACEMENT PROCEDURE: 1. Turn off the electricity before working on the alarm. 2. Unplug the alarm or disconnect the power cord. 3. Unscrew the face plate of the alarm. 4. Remove the two wire nuts and disconnect the green and white sensor wires. 5. Remove the alarm box from the wall or mounting bracket and replace with a new alarm. 6. Reconnect the sensor wires (white to white; black to black). 7.
MULTI~FLO WASTE TREATMENT SYSTEM OPERATIONAL CONTROL CHART OPERATION CONDITION COLOR: AERATION TANK ODOR PERCENT SETTLEABLE SOLIDS EFFLUENT QUALITY FILTER CONDITION POSSIBLE PROBLEM CORRECTIVE ACTION Plant start-up 0-6 weeks Clear to light brown; White suds None < 5% Clear No signs of plugging None: Normal start-up condition No action required Re-check in 6 months Light loading to plant; insufficient food for organisms sudsing due to hydraulic overload during laundry Reduce frequency of lau
WASTEWATER TREATMENT SYSTEMS CCESS COVERA PRIMARY SENSOR ASSY JUNCTION BOX SURGE BOWL SPRING RING RETAINER AIR TUBING OUTLET INLET UNION FILTER EXPANDER AIR INTAKE PIPE AERATOR POWER CORD AERATOR PROCEDURE FOR PUMPING THE MULTI~FLO: 1. Shut off the MULTI~FLO and allow solids to settle for 30-to-60 minutes. 2. Remove access cover and the surge bowl. 3. Lower hose carefully into the center aeration chamber.
MULTI-FLO WASTEWATER TREATMENT SYSTEMS OWNER’S MANUAL Revised August 8, 2002 Consolidated Treatment Systems, Inc. 1501 Commerce Center Drive Franklin, OH 45005 937-746-2727 www.multi-flo.
Multi-Flo Owner’s Manual Revised August 8, 2002 THE MULTI-FLO ONSITE WASTEWATER TREATMENT SYSTEM CONGRATULATIONS! You are the owner of a complete wastewater treatment system that combines aeration and filtration in one compact unit. Your system is tested and certified under NSF, International, ANSI/NSF Standard 40, as a Class I system. The Multi-Flo system meets the needs for onsite wastewater treatment beyond the capabilities of septic tanks.
Multi-Flo Owner’s Manual Revised August 8, 2002 § Check the alarm by pressing the button to activate the light and buzzer on the audio-visual alarm. § Keep the surface water from ponding around the unit. § Call your service provider at the first sign of trouble. § Follow your service provider’s advice. He/she is trained to ensure that your unit operates at its maximum efficiency. § Use low-sudsing, low phosphate biodegradable detergents.
Multi-Flo Owner’s Manual Revised August 8, 2002 MAINTENANCE PROGRAM YOUR MULTI-FLO UNIT REQUIRES PERIODIC SERVICING. Maintenance of your Multi-Flo is essential to ensure its proper operation and longevity. During your initial two-year warranty, an authorized service representative will inspect your unit at six-month intervals and make any necessary adjustments to it at no cost to you.
Multi-Flo Owner’s Manual Revised August 8, 2002 5. Disposal into the Multi-Flo of non-biodegradable materials (i.e., plastics, coffee grounds, etc.) chemicals, solvents, grease, oil, paint, or any other substance, including but not limited to medicines, metals, toxins, volatile substances, and the like that are deleterious to the development and maintenance of the biological treatment process. 6.
Multi-Flo Owner’s Manual Revised August 8, 2002 MULTI-FLO COMPONENTS AND SPECIFICATIONS 7 1 8 9 2 3 10 11 12 4 5 13 6 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 14 Part No. A5037 A9510 A5025 B5017 W49104L A3016 A3008 A6517 A5029 A6002 A5026 A9516 A6603-4 A10031 Consolidated Treatment Systems, Inc. Description Junction Box & Junction Box Cover Air Tubing from sensor Inlet Pipe Filter Expander Air Intake Assy. Access Cover Assy. Primary Alarm Sensor Assy.
Multi-Flo Owner’s Manual Revised August 8, 2002 WARRANTY Consolidated Treatment Systems, Inc., warrants the parts in each aerobic treatment unit to be free from defects in material and workmanship for a period of two (2) years from date of installation for treatment of household wastewater when properly registered with the manufacturer. Consolidated Treatment Systems, Inc., sole obligation under this warranty is as follows: Consolidated Treatment Systems, Inc.
