The Clean Earth Process
Each of the two facilities has the basic layout.
- A computer controlled 24/7 access allows haulers to come in whenever they want to dispose of their waste. Each company/driver has a smartcard to enable access, associate each load to a driver/company and differentiate waste streams. This is technology developed by Clean Earth Ltd.
- Each load of waste is metered and Clean Earth charges a specific amount per gallon which depends on the type of waste. The hauler receives a ticket indicating the date, time, company, and amount unloaded.
- The waste goes through a bar screen, into a receiving pit with a weir. The weir keeps sand, rocks, and debris on the weir side with the waste flowing over into a pump chamber where the waste is pumped through a grinder and into a holding tank.
- The holding tank keeps the solids suspended with mixers until the operator is ready to process through the Fournier Rotary Presses. Fredericton has a total holding capacity of 170,000 gals while Saint John has a total holding capacity of 300,000 gals.
- When the press is started, a submersible pump pumps the waste back to the process building where a polymer is added for flocculation.
- The separation takes place in the press with the effluent water going into the municipal wastewater system and the solids going into a roll on-roll of container.
- The solids are taken to a compost company where the dewatered biosolids are used as a feedstock for their process.
Materials Clean Earth Accepts
Clean Earth is in the business of receiving and dewatering the following wastes:
- Residential, commercial and industrial septage (waste from septic tanks)
- Grey water produced from industrial constructions projects
- Fish waste including blood water, fish manure and process fish waste
- Grease trap waste from commercial and institutional facilities
- Some agricultural liquid wastes