Previous work has demonstrated that inhibition of volatile solids destruction during anaerobic digestion occurs at elevated calcium levels. In this work, calcium inhibition has been taken into account in the design of a treatment facility digesting sludges which contain lime from phosphorous removal. A conventional activated sludge treatment facility has been designed along with a facility removing phosphorous by lime addition to primary clarifiers. Unit sizing, costs and energy requirements are compared and discussed.

This content is only available as a PDF.