Removal of sludge and conversion to fertilizer
The concentrated sludge after dewatering contains approximately 18% solids, of which about 75% are volatile solids.
Approximately 70,000 tons of sludge are produced annually at the treatment facility.
The dewatered sludge is transferred by trucks to two sites for continued treatment far from populated areas.
The sludge undergoes a composting process at these sites by a subcontractor.
Composting is a biological fermentation process that is accompanied by the production of heat that converts the sludge into a homogeneous, sterile and environmentally-friendly material.
The final product at the end of this process is marketed as an agricultural fertilizer.
In this way, the sludge is recycled and does not become an environmental nuisance.
Composting site producing agricultural fertilizer