Municipal Wastewater

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Municipal Wastewater

CRA's areas of expertise include:

• Sewage collection systems
• Wastewater treatment facilities
• Biosolids management
• Utility, O&M planning, and asset management assistance

 

CRA has broad municipal wastewater engineering expertise in the areas of  sewage collection systems (gravity sewers, pump stations, and forcemains), wastewater treatment facilities, biosolids management, utility planning, operation and maintenance, and asset management services.  Typically, this work is carried out through a variety of projects and approaches designed to fit specific circumstances, such as:

• Facilities planning studies
• Environmental assessment and impact studies
• Process audits, process evaluation studies, and treatability studies
• Preliminary designs
• Detailed designs
• Construction document development
• Services during construction including construction contract administration and resident engineering
• Facility start-up and commissioning, operator training
• Alternate delivery methods such as design-build, design-build-operate, and performance contracting

 

Sewage Collection Systems

• Gravity sewers including hydraulic modeling/analysis, corrosion control, infiltration and inflow studies, real time control
• Pumping stations and forcemains including low and medium voltage systems, stand by power facilities, hydraulic surge analysis, PLC and SCADA control systems
• CSO and SSO studies and abatement facilities design and construction

 

Wastewater Treatment Facilities

• Collection area loading assessment studies
• Process audits and condition assessments
• Environmental assessment and approvals
• Stream assimilative capacity studies
• Primary, secondary, and tertiary treatment facility modeling, designs, and studies
• Advanced treatment designs including membrane technologies
• Compact treatment technologies including biological aerated filters, moving bed biological reactors, and integrated fixed film activated sludge and membrane bioreactors
• Facility emergency response, security, and integrated contingency plan development
• Water reclamation facilities
• Disinfection including chlorination, dechlorination, ultraviolet disinfection, and ozonation

 

Biosolids Management

• Waste activated sludge thickening
• Sludge stabilization including aerobic digestion, anaerobic digestion, alkaline stabilization, phased temperature digestion, composting, and incineration
• Biosolids dewatering and drying
• Biosolids beneficial reuse planning and marketing

 

Utility Planning, O&M, and Asset Management Assistance

• District establishment, formation, and extension studies
• User fee rate structure analysis and design
• Rate model development
• Competitive assessments and benchmarking evaluations
• Infrastructure condition assessments and present worth valuations
• Permitting and regulatory impact assessments
• Operator training
• Asset management plan studies
• Capital investment/replacement program development