Sewage Parameters 1: BOD
Sewage Parameters 1: BOD or Biochemical Oxygen Demand
Before discussing package sewage treatment it is best to explain the parameters used to define sewage both when it comes into a treatment plant (influent) and when it leaves a sewage treatment plant (effluent). One of the main parameters to consider is BOD or BOD5 which means Biochemical Oxygen Demand (the ’5′ refers to the sewage being tested for BOD over 5 days, which is standard when testing BOD levels).
In essence it measures the amount of oxygen required by microorganisms in the sewage to break down the organic content contained in the sewage. Sewage with a high BOD has high pollution potential, if discharged untreated into a water course because it can result in severe depletion of the oxygen content of the water and thus kill aquatic animals such as fish which need oxygen to breath. Influent BOD in normal domestic sewage is generally 300 mg/l and it is then treated to at least 25 mg/l (as per European norms) before discharge to minimise pollution potential. Most package sewage treatment plants or package wastewater treatment plants such as the BMS Blivet are designed to produce 25 mg/l of BOD at a minimum but much stringent more stringent BOD levels down to 5 mg/l can be produced if specified. Next up will be Suspended Solids (SS)
If you have any specific queries or there is any topics you would like explored, please do not hesitate to contact me, Tommy.
A bit about the company:
A bit about the company:
BMS is a quality manufacturer of package products for wastewater and stormwater treatment. BMS started in 1986 and has exported products to over 50 countries around the world. It is a third generation family business with huge expertise in wastewater and stormwater.
BMS manufacture a full range of products for surface water and wastewater treatment including our pioneering next generation RBC system the Aerotor, which forms part of our world leading Blivet package sewage treatment plant, a ‘one stop shop’ for all surface water products from design to installation including attenuation, interceptors, holding tanks (incl. chemical resistant), hydrobrakes, rainwater harvesting tanks & vortex silt/oil/debris separators, fully fitted pumping stations, our plug & play vehicle wash water recycling system; the Recyclone and much more. All BMS products manufactured in our ISO 9001 factory are made using solar energy from our own PV system.
BMS also can provide a Free Design Service for Sewage Treatment, Pump Stations or Surface Water and a full O&M, Repair, Advice and Testing service for existing installations. We also can do free CPD Presentations on Sewage Treatment/Surface Water Management at any location.
We would be delighted to discuss any requirements you might have and we are available to meet you at your convenience. Please do not hesitate to contact us.
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