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Dec 22, 2022 241 likes •338 views

Municipal Biosolids as a P source Phosphorus Workshop Ryerson University June 19, 2014 Michael Payne Black Lake Environmental What are Biosolids? Biosolids result from municipal wastewater treatment have undergone some form of

SLIDE 1

Municipal Biosolids as a P source

Phosphorus Workshop Ryerson University

June 19, 2014 Michael Payne Black Lake Environmental

SLIDE 2

What are Biosolids?

 Biosolids

result from municipal wastewater treatment
have undergone some form of treatment /

stabilization

contain nutrients, organic matter and

micronutrients

also contain trace amounts of other elements
and micro organisms
Estimated that Canadians generate

660,000 tonne (dry wt) per year

SLIDE 3

Influent Sources

~90%

SLIDE 4

Types of Sewage Biosolids

Liquid aerobic
Liquid anaerobic
Lime Stabilized
Pelletized
Composted
Dewatered

SLIDE 5

How are Biosolids Used in Ontario?

 Biosolids are typically:

 landfilled

 incinerated  land applied

Agricultural Land
Forestry
Land Reclamation
Landfill Closure
Urban

SLIDE 6

Phosphorus Availability

 Will vary depending on treatment method

Biological nutrient removal
Chemical removal
Further processing

 Total P typically in 4% range (dwb)

Varies with influent sources

 Availability

Ontario assumes 40% available in the year
f application & another 40% over time

SLIDE 7

Limiters to Utilization

 Public Perception

Contaminants: metals, legacy

chemicals, PPCP’s, pathogens

Odour
“Ick” & “NIMBY” factor

 Weather

SLIDE 8

Encouragers

 Economics  Organics diversion mindset  Further processing  Marketing  Science