Septic Tank Bacteria

Sewage
Sewage typically contains 95% to 99% water.

Impurities in sewage

Micro organisms
Often includes disease causing organisms (pathogens), including bacteria, viruses, protozoa and parasitic worms. Usually measured by the presence of E.coli (a common type of bacteria found in the intestines).
100 mL of sewage contains around 10 million E. coli bacteria.

Phosphorus compounds
These are present in human wastes (feces) and in detergents. Typical levels are 15 to 20 mg per liter of sewage.

Nitrogen compounds
These are mostly present as ammonia or urea. Typical levels are up to 100 mg per litre of sewage.

Suspended solids
Includes inert material such as sand and organic solids such as food scraps. Typical levels in sewage are 400 mg per litre.

Organic matter
Usually measured by BOD (Biological Oxygen Demand) or COD (Chemical Oxygen Demand).
This can include feces, fats and oils. Typical BOD levels in sewage approximately 400 mg per liter.
Additionally, sewage will contain rags, plastics, sanitary products and other large solids.
Trace amounts of other compounds, including heavy metals and various organic compounds (e.g. pesticides, herbicides, and weedicides) will also be present, even in purely domestic sewage and in higher levels if incorrectly treated trade wastes have entered the sewerage system.

 

 



Previous Article : Septic Tank Pump Out - - Next Article : Aerobic Treatment Unit

Featured Articles
Providing Quality Service...Guaranteed In the Greater Austin Area of Travis, Hays, Williamson, Burnet, & Bastrop Counties , Volente, Lakeway, Austin, Hays County, Kyle, San Marcos, Florence, Thrall, Williamson County, Misc Locations, Bell County.
Call (512) 338-1804 for fast, dependable service.
Maintenance Here's a logical fact of life regarding septic systems: All septic systems require maintenance to keep them working correctly and to ensure their long life....
Unhappy With Your Septic System? Why do so many customers end up dissatisfied with their septic systems? We feel it starts with nobody asking or even considering the owner's opinion before...
Seller Says "Too Bad" Seller Says “Too Bad” After Homebuyers Find Rotting Septic Tank Under Plywood (From Pumper Magazine, October 23, 2018) A news organization in Cortland Manor,...
  • Septic Disposal Do not use in-sink garbage grinders excessively or discard too much grease. Garbage grinders can cause sludge or...
  • Septic Tank Service Outline of Inspection Agreement Service Procedures:The Service Technician will: 1.Be driving a company vehicle with signage identifying company...
  • Septic System Care OUTLINE OF...
  • Septic Odor Why does my septic system stink at our vacation home?For this answer to make sense we need to...
  • Septic Pumping Services If you are considering the purchase of a home, you may not know the size of the tank,...