Sewage Sludge Minimization by means of Wet Oxidation: Process Performance and Economic Sustainability

Abstract

Today, several technologies and management strategies are proposed and applied in WWTPs tominimize sludge production and contamination and their techno-economic feasibility has to becarefully evaluated. Wet oxidation (WO) process is an alternative solution to conventionalincineration for converting sewage sludge to inert residues. In this work (which is being conductedwithin the EU project "ROUTES"), based on bench scale tests results, a mass balance was drawnfor a WWTP (500,000 PE), where it was supposed to install a WO stage for sludge minimization.The design of treatment units and the estimation of capital and operation costs were thenperformed. Subsequently, a procedure for technical-economic assessment (benchmarking) wasdeveloped. Basically, this procedure consists in the definition and ranking of several technical (e.g.reliability of the technology, complexity and integration with the existing facilities, amount ofresidues to be disposed of or recovered,...) and economic aspects. Preliminary results have shownWO to be a suitable solution for sludge minimization.


Autore Pugliese

Tutti gli autori

  • Bertanza G.; Zanaboni S.; Canato M.; Laera G.; Galessi G.

Titolo volume/Rivista

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Anno di pubblicazione

2012

ISSN

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ISBN

978-975-404-919-0


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Settori ERC

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