Water research | VOL. 223
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Economic, technical, and environmental evaluation of retrofitting scenarios in a full-scale industrial wastewater treatment system.

Publication Date Aug 18, 2022

Abstract

The use of mathematical models is a well-established procedure in the field of (waste) water engineering to "virtually" evaluate the feasibility of novel process modifications. In this way, only options with the highest chance of success are further developed to be implemented at full-scale, while less interesting proposals can be disregarded at an early stage. Nevertheless, there is still lack of studies, where different plant-wide model predictions (effluent quality, process economics, and technical aspects) are comprehensibly verified in the field with full-scale data. In this work, a set of analysis/evaluation tools are used to assess alternative retrofitting options in the largest industrial wastewater treatment plant in Northern Europe. A mechanistic mathematical model is simulated to reproduce process behavior (deviation<11%). Multiple criteria are defined and verified with plant data (deviation<5%). The feasibility of three types of scenarios is tested: (1) stream refluxing, (2) change of operational conditions and (3) the implementation of new technologies. Experimental measurements and computer simulations show that the current plant´s main revenues are obtained from the electricity produced by the biogas engine (54%) and sales of the inactivated bio-solids for off-site biogas production (33%). The main expenditures are the discharge fee (39%), and transportation and handling of bio-solids (30%). Selective treatment of bio-solid streams strongly modifies the fate of COD and N compounds within the plant. In addition...

Concepts

Life Cycle Impact Assessment Implementation Of New Technologies Mechanistic Mathematical Model Discharge Fee Change Of Operational Conditions Biogas Engine Poly-aluminum Chloride Inactivation Technology Inactivation Agents Industrial Wastewater Treatment

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