A potato processing operation required to build an anaerobic sludge digestion system. The project included the design and bid of a sludge management system for thickening waste activated sludge, thickened waste activated sludge conditioning and anaerobic digestion. The work involved process design; preparing detailed technical specifications for tanks, buildings, process equipment; instrumentation and control diagrams; and civil and mechanical drawings. The pre-design and technical specifications were used to bid the system as a design-build project. Bids were evaluated for the client based on a cost-benefit ratio and the recommendations were forwarded to the owner.