Biosolids/Energy Management Plan
HDR prepared a biosolids handling preliminary design report for the District's Michelson Water Recycling Plant, as well as an energy efficiency master plan for Michelson and the District's Los Alisos Water Recycling Plant.
The following major project elements were completed:
- Identified solids handling design criteria and energy efficiency goals
- Developed solids production estimates and mass balance models for both treatment plants
- Identified solids handling costs for discharging solids to Orange County Sanitation District
- Evaluated a wide range of district-wide biosolids management alternatives that would decrease life-cycle costs and reduce carbon footprint
- Developed and evaluated alternatives to optimize solids thickening, digestion, dewatering, conveyance and drying
- Explored public/private partnerships for solids handling opportunities, requirements, costs, and benefits
- Identified required permits, major environmental hurdles, level of environmental documentation and preparation of the California Environmental Quality Act initial study and environmental checklist
- Completed preliminary design of selected solids handling recommendations including: centrifugal thickening, advanced digestion, gas utilization in a fuel cell, centrifugal dewatering, and biosolids drying
- Developed energy efficiency master plan for both treatment plants
- Identified opportunities for grants and incentives
- Evaluated biogas treatment and utilization options.
- Developed biosolids management plans for both facilities
- Estimated capital, O&M and life-cycle costs of various alternatives