Sewage Treatment Terminology Explained A-Z Part 2; Balance Tank to BOD

Welcome to our education blog explaining terms used in sewage treatment from A-Z. Part 2 is from Balance Tank to BOD.

This week we are concentrating on explaining terms or jargon beginning with 'B' used in the area of sewage or wastewater treatment.  The terms are; Balance Tank, Biofilm, Biozone, Blivet, BMS & BOD/Biochemical Oxygen Demand.

8. BALANCE TANK: A tank placed before a BMS BLIVET installation when most of the SEWAGE flow comes over a few hours per day, such as often seen in a hotel.  It is designed to even out these flow peaks and pump to the Blivet in regular smaller amounts. This is normally achieved by pumps in the tank activated by a pre-set timer.

9. BIOFILM: A layer of micro-organisms and their products attached to a surface e.g. The BMS AEROTOR.  A maximum surface biofilm is often quoted as a requirement in specification’s for RBC systems as only the biofilm on the outside of the RBC is active.  Excess biofilm can put excess load strain on the shaft.  The Aerotor does not suffer from this problem as a rotates at a faster speed than traditional RBC’s meaning that all excess surface biomass is shed during operation and on start up after shut down.

10. BIOZONE: The AEROBIC Stage of a Treatment System usually between Primary Settlement and Final Settlement.  In the case of the BMS BLIVET System it is the GRP tank and rotors i.e. AEROTOR.

11. BLIVET: BMS Trade Mark for the BMS "all in one" PACKAGE SEWAGE TREATMENT SYSTEM incorporating the AEROTOR with PRIMARY SETTLEMENT, FINAL SETTLEMENT and SLUDGE Storage.

12. BMS: Acronym for Butler Manufacturing Services.

13. BOD/BIOCHEMICAL OXYGEN DEMAND (BOD/BOD5): The amount of dissolved oxygen consumed by microbiological action under AEROBIC conditions. A sample is incubated, usually for 5 days at 20˚C (thus BOD5 in mg/l).  It is used to measure the pollution potential of SEWAGE.

BMS Education Blog/Customer Questions section is also an excellent source of information on sewage treatment and its terminology.  More detailed explanations of parameters used to measure final effluent quality can be found by clicking on the links e.g. BODSSNH4NCOD & P.

The next article will explain terms/jargon used in sewage treatment from C to E; Clarifier to Eutrophication.

If you have any questions of would like information on package wastewater treatment products, please do not hesitate to contact us.

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.

© Butler Manufacturing Services 2024.

Tommy Bulter

M.Pharm (Hons) MBS (Hons) Cert. H&S (Allison)
• 15 year’s + experience in Management in Waste/Surface Water, R&D & H&S.
• Project Management specialist, Marketing specialist, Pharmacist, Wastewater and pump specialist.

https://butlerms.com
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Sewage Treatment Terminology Explained A-Z Part 1; Aerotor to Anoxic

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Sewage Treatment Terminology Explained A-Z Part 3; C to E; Clarifier to Eutrophication