The City required an alternate disposal method for the residual material we collect from sanitary lift stations and combined sewer sand traps. This new facility at the Gold Bar Wastewater Treatment Plant allows us to screen, wash and separate the grit material, and then to safely treat the wastewater through our existing wastewater treatment process.
The facility requires a high volume of water (142m3/hour), so instead of potable water, treated effluent from Gold Bar is used to wash the sanitary grit material, and then it re-enters Gold Bar's treatment process.
The fine grit material that is washed and dewatered only contains three per cent organics and can be reused for other purposes, such as road construction and trench backfill. This reuse keeps this material out of the landfill.