Criteria Description Rating
Mechanical Simplicity
Ease of operation and maintenance. Degree of process automation. Operators with average training are able to run and maintain the system with minimal training.
Mechanical Reliability
Major components are reliable based on industry experience. Replacement parts are readily available and inexpensive. Service and support personnel are nearby and available.
Compatibility and Flexibility
Ability of the system to accept and process feedstock variations and volume fluctuations without difficulty.
Site Requirements
Minimal required footprint, facility size, and building size/height requirements.
Proven Process
Importance of existing facilities and years of proven operating history.
Complete Single-Provider Package
Ability to have a single solution provider for design, installation, operations, and ongoing support.
Current Regulatory Compliance
Ability to meet current Class A or Class B regulations. Biosolids and any other emissions from the system completely comply with current regulatory limits.
Future Regulatory Compliance
Ability to meet future regulations. The system complies with current biosolids and other applicable regulations as well as anticipated future regulatory changes.
Local Environmental Impact
Odor, visual impact, noise. Degree to which the system minimizes the impact to the surrounding community.
End Product Marketability
High quality biosolids end product provides a variety of disposition or beneficial reuse options, potentially including sale as a value-added product.
Safety
Degree to which the system limits exposure to potential hazards and direct exposure to sludge. Importance of the safety record of existing facilities.
Capital Costs
Cost to purchase, install, and start up the system.
Operating Costs
Cost to operate the system. Consistency and predictability of operating costs.
Energy Costs and Sources
Energy efficiency and overall energy costs to operate the system. Flexibility of energy sources (e.g. electricity, natural gas, propane).
Outsourced Services
Comfort with outsorcing process management from sludge management to final disposition.
