This post is a work in progress and as I unearth more statistics I will add them to this post.
The maximum depth of a fluid sewage biosolid that can be surface applied at any one time is 1.3 cm. This depth is equivalent to an application rate of 130 m3/ha. from an article by M Payne of Omafra (Ont Govt) Environmental Science & Engineering – www.esemag.com – September 2001
If a single application of fluid biosolids is to be limited to 1.3cm you can see why such vast areas of land are being contaminated. It sure begs the question How precise are these contractors in their application????
BIOSOLIDS UTILIZATION PROGRAM STATUS UPDATE From 1997 to 2000, over 53,548 wet tons of biosolids have been successfully land applied to farms in and around the Region of Ottawa-Carleton on over 2,117 hectares of land.
Ontario- Toronto using farms in
These include all agricultural land within an area bounded by Hamilton, Brant, Waterloo, Perth and Bruce on the west, Grey,Simcoe, and Muskoka on the north and Peterborough, Hastings and Prince EdwardCounties on the east. Using the three inventory methods, the following results
were obtained for this area:
♦ Based on Method 1, this land area has the capacity to accept
approximately 17,000 tonnes of dry biosolids per year (17,000 t ds/y);
♦ Based on Method 2, this land area has the capacity to accept
approximately 26,000 t ds/y; and,
♦ Based on Method 3, this land area has the capacity to accept
approximately 133,000 t ds/y.
These figures can be compared to the Toronto biosolids generation rate of 63,000
t ds/y, of which 50,000 t ds/y is currently intended for beneficial reuse such as
agricultural land application as biosolids cake or thermally dried pellets. When application is limited by soil nutrient requirements (Method 1),
phosphorus is the limiting nutrient, and there are 22 Counties or Regions,out of 48 in total for the province, that have no additional capacity for
biosolids once manure application is taken into account.
from Biosolids and Residuals Master Plan City of Toronto 2523 040415 R
Whatever you call it, the province’s municipalities produce a lot of it: 914,726 tonnes of sludge was scraped out of 700 water treatment plants in Quebec in 2007, the most recent year for which these statistics are available.
About 42 per cent of the sludge was incinerated and 31 per cent was sent to dumps. But the remaining 27 per cent was “recycled” as fertilizer, mostly on farmland.
That’s 246,976 tonnes, can you picture an area
1000 metres long by 1000 metres wide by 1000 metres deep?
its hard to visualize that much shit & chemical toxins I know.
– if you get in your car and drive 1 kilometer turn at right angles drive another kilometer, turn again at a right angle drive another kilometer back to your starting point and look up in the sky 1 kilometer that’s almost how much toxic sludge was applied to Quebec farms in 2007.