BOD & TSS Waste Program FAQs

What is Biochemical Oxygen Demand (BOD)?
What is Total Suspended Solids (TSS)?
Why is BOD and TSS Waste a concern?
How can I decrease BOD and TSS concentrations in my wastewater?
Why is my company included in the BOD and TSS waste program?
Who do I contact if I have any further questions?


What is Biochemical Oxygen Demand (BOD)?
Biochemical Oxygen Demand (BOD) means the quantity of oxygen utilized in the biochemical oxidation of organic substances under standard laboratory procedures in five days at 20o C expressed in mg/L.  In wastewater with a high BOD, there will be a large amount of organic substances in the wastewater.  There will also be a lot of bacteria present working to decompose these substances so the demand for oxygen will be high (due to all the bacteria).

What is Total Suspended Solids (TSS)?
Total Suspended Solids (TSS) means the total suspended matter that floats on the surface of, or is suspended in, water, wastewater or other liquids and which is removable by laboratory filtering.  In wastewater with a high TSS, there will be a large amount of solids or residue retained on the filter during the laboratory analysis. 

Why is BOD and TSS Waste a concern?
Heavy loadings of Biochemical Oxygen Demand (BOD) and Total Suspended Solids (TSS) entering the JAMES Treatment Plant can adversely affect treatment processes and can contribute to increased treatment plant expansion needs.  To mitigate these effects, a wastewater monitoring program was developed to ensure costs are recovered for treating this type of waste.

How can I decrease BOD and TSS concentrations in my wastewater?
There are a number of options available for decreasing concentrations in BOD and TSS in wastewater.  A number of reputable companies can be contacted for professional assistance on this topic by looking in the yellowpages under “Environmental Consultants & Services”.

Why is my company included in the BOD and TSS waste program?
Inclusion in the BOD and TSS waste program is determined based on the quality and volume of wastewater discharged to the sanitary sewer on a monthly basis.  If smaller volumes of wastewater are high in BOD and TSS concentrations, your company’s wastewater can still affect treatment processes at the JAMES Treatment Plant.  Alternatively, larger volumes of wastewater with lower BOD and TSS concentrations can also affect treatment processes.  WSCSCP staff evaluates each wastewater discharge on a case by case basis to determine inclusion in the BOD and TSS waste program.

Who do I contact if I have any further questions?
Joe Vurzinger, CTech
Utilities Environment Manager
Tel:  604-864-5663
Email: jvurzinger@abbotsford.ca