ShapeRectangle 2ShapeXXnote2clipboardclockcredit@2xGroupShapeShapeShapeGroup 2GroupHeart - FontAwesomeGroupinstagram@2x (1)magnifying47map-markerGroupphoneShapesocial-pinterest-outlineGroupribbon001-test-tubeShapeShapesocial-youtube-outline

Fact Sheet: Home Aeration Units – Cavitette

Home  >  Resources  >  Fact Sheets  >  Fact Sheet: Home Aeration Units – Cavitette
Resources
Overview
Fact Sheets
Overview
Fact Sheet: Animal Quarantine
Fact Sheet: Backflow & Backflow Devices
Fact Sheet: Bed Bugs
Fact Sheet: Bedbug Guidelines for Travelers and Public Accommodation Facility Guests
Fact Sheet: Blue-Green Algae/Cyanobacteria Harmful Algal Bloom (HABs) Physician Reference
Fact Sheet: Bureau for Children with Medical Handicaps
Fact Sheet: Church Festival Food Safety
Fact Sheet: Cleaning up After Flood & Sewer Backups
Fact Sheet: Cockroaches
Fact Sheet: Collector Line Tips
Fact Sheet: Commercial Waste Handling and Good House Keeping
Fact Sheet: Connecting to Sewers
Fact Sheet: Cottage Food Operation
Fact Sheet: Dangers of Extreme Cold
Fact Sheet: Daycare Control Measures for Prevention of Communicable Diseases
Fact Sheet: Emergency Pet Kit
Fact Sheet: Extreme Heat
Fact Sheet: Farm Markets
Fact Sheet: Farmers’ Markets
Fact Sheet: Fight the Bite – Facts About Zika Virus
Fact Sheet: Financial Aid for Sewer Connections and Septic System Replacement
Fact Sheet: Fish Fry Food Safety
Fact Sheet: Flood Safety
Fact Sheet: Flooding in a Food Service Operation
Fact Sheet: Food Safety During Power Outages
Fact Sheet: Food Safety When Eating Out
Fact Sheet: Frozen Pipes
Fact Sheet: Gastroenteritis and Norovirus
Fact Sheet: Gastroenteritis in a Retirement/Assisted Living Facility
Fact Sheet: Get Rid of Roaches
Fact Sheet: Guide to Mosquito Control & Mosquito-borne Illnesses
Fact Sheet: Guidelines For Environmental Cleaning and Disinfection of Norovirus
Fact Sheet: Guidelines for Handling Bed Bugs in a School
Fact Sheet: Guidelines for Social Workers, Home Health Care Nurses, and In Home Visitors
Fact Sheet: Guidelines for the Control of a Suspected or Confirmed Outbreak of Viral Gastroenteritis in a Nursing Home
Fact Sheet: Hamilton County Public Health Flood Fact Sheet
Fact Sheet: Hand Washing
Fact Sheet: Handling Water from Swimming Pools and Hot Tubs
Fact Sheet: Heat
Fact Sheet: Hepatitis A
Fact Sheet: Home Aeration Units – Cavitette
Fact Sheet: Home Aeration Units – Coate Aer
Fact Sheet: Home Aeration Units – JET
Fact Sheet: Home Aeration Units – Multi-Flo
Fact Sheet: Home Aeration Units – Oldham
Fact Sheet: Home Swimming Pools
Fact Sheet: Homeowner’s Plumbing Permit
Fact Sheet: Household Sewage Treatment System Tips
Fact Sheet: Household Sewage Treatment Systems & Power Outages
Fact Sheet: How Germs Spread
Fact Sheet: How to be Safe Around Animals
Fact Sheet: Itch Mites
Fact Sheet: Keeping Food Safe During an Emergency
Fact Sheet: Leachfields
Fact Sheet: Lead Poisoning
Fact Sheet: Lice
Fact Sheet: Methicillin-Resistant Staphylococcus Sureus (MRSA)
Fact Sheet: Mold and Mildew
Fact Sheet: MRSA in a Prison Setting
Fact Sheet: Norovirus in Schools
Fact Sheet: Ohio EPA Semi-Public Sewage Disposal System Inspection Program
Fact Sheet: Privacy Practices, Our Legal Duty
Fact Sheet: Private Water System Testing
Fact Sheet: Rabies & Bats
Fact Sheet: Rodent Control
Fact Sheet: Scrap Tires
Fact Sheet: Septic System Abandonment and Sanitary Sewer Connection
Fact Sheet: Septic Systems – AdvanTex AX20 Treatment System
Fact Sheet: Septic Systems – Septic Tanks
Fact Sheet: Septic Systems – Subsurface Sandfilters
Fact Sheet: Sewage Treatment System Owners
Fact Sheet: Sewer Back-ups
Fact Sheet: Storm Drain Overflow
Fact Sheet: Stormwater Pollution and Yard Waste
Fact Sheet: Sump Pumps
Fact Sheet: Tattoos and Piercings
Fact Sheet: Vacuum Sealing + Hazard Analysis Critical Control Point (HACCP)
Fact Sheet: Waste Disposal
Fact Sheet: Water Heater Permits and Inspections
Fact Sheet: Well Disinfection
Fact Sheet: When Do I Need a Plumbing Permit?
Fact Sheet: Whooping Cough
FOI Requests
Links
Partner & Public Health Research
Reports

KNOW THE FACTS!
Home Aeration Units – Cavitette

Illustration of your Unit

You currently live in an unsewered area of Hamilton County. The waste from your house is treated by a home aeration unit. These units come in many shapes and sizes. They are sometimes referred to as “cavitettes.” Cavitette is the brand name of one aeration unit used in our county. The other brands used are: Coate Aer, Jet, Multi-Flo, Norweco, and Oldham. Although aeration units have different brand names, the principle of operation is basically the same; air injected into sewage provides agitation and oxygen which allows bacteria to reduce organic waste to carbon dioxide and water.

 

Treatment Process

Cavitette units are manufactured to produce an effluent that will not meet current water quality standards. However, a properly operating unit will provide a clear effluent. The following process is used.

  • Primary – (Pre-Treatment/Settling) Cavitette units do not provide for settling in the treatment process.
  • Secondary (Aeration) – Raw sewage from your home first flows to this chamber. (See #1) Injected air provides agitation and oxygen to aerobic bacteria which reduce organic matter in wastewater.
  • Clarification – The second chamber (#2) has no agitation so suspended solids remaining in the aerated sewage can settle. This chamber is angled so solids return to the aeration chamber for further treatment.

Tertiary (Filtration/Disinfection) – Cavitette units do not provide for filtration in the treatment process. A separate chlorinator for disinfection may be added to some units.


Care of your Unit

Your Cavitette may be a 750 or 1500 gallon per day treatment plant.

Note: Some aeration units are installed very deep below the surface of the ground. Maintenance to the units poses special safety problems and should be performed by an experienced contractor. If you meet the preceding criteria or are uncomfortable with the following procedures, contact a maintenance company registered and bonded with the Health District.

Lids – Lids must be accessible and extend four to six inches above grade. Check lids for cracks that allow surface water to enter the system or prevent Health District personnel from performing inspections. Lids that cannot be moved without cracking or falling apart must be replaced.

Aeration Tank – Remove lid from the aeration riser and check the following:

  • Electrical service wire-Replace if wire is frayed or black residue is present.
  • Air supply line-Line should be securely connected to the motor/blower and the diffuser bar.
  • Belt/Coupler-Belt should not be cracked or broken.
  • Motor/Blower-If the motor/blower is not running, touch carefully checking for warmth. The motor should be replaced/repaired if cold.
  • Remove porthole lid inside the aeration riser to view the aeration process.
  • Air bubbles-Turbulence and air bubbles in the wastewater indicate aeration is taking place.
  • Replace all lids.

Clarifier – Remove lid from clarifier riser. If no riser is present, one needs to be installed. Liquid below should be clear, not cloudy or grey. If there is an accumulation of floating material, it should be skimmed and discarded. If a scum layer is more than 6 inches thick the compartment should be pumped. Make sure baffle is in place and not deteriorated.

Discharge Point – Check the discharge point. If discharge effluent is not clear, or black/grey matter is deposited at the discharge point, call a service contractor. Aeration unit discharge points are not appropriate play areas for children even when systems are operating properly.

 


Managing your Unit

\Sewage tank pumpers must be registered with the Health District. The principle purpose of tank pumping is to remove sludge. You may want to be present at the time of pumping to insure all sludge and wastewater is removed. Contracted repairs must be performed by registered professionals. To receive a list of registered pumpers and contractors call the Health District at (513) 946-7966.

 

Questions

For more information, call the Water Quality Division at 513.946.7966 or visit www.hamiltoncountyhealth.org.

 

Download a printable version of this fact sheet here.

 

250 William Howard Taft Road
2nd Floor, Cincinnati, OH 45219
Phone 513.946.7800 Fax 513.946.7890
hamiltoncountyhealth.org