Urban Waste Water

Economical upgrading of existing single-stage trickling filter plants with a supplementary cascaded activated sludge stage

Calculation parameters were worked out for upstream, unvented aeration processes, taking cost-effectiveness into consideration as well. These parameters and economic observations can be used to assist planning and decision-making activities for developing or expanding wastewater treatment plants that use trickling filters or for improving their robustness. The chemical oxygen demand (COD) is the principal parameter for determining the recommended calculations 

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Source: German National Library of Science and Technology Hannover (TIB)