The potential use of shear viscosity to monitor polymer conditioning of sewage sludge digestates.

Autor: Oliveira I; Wales Centre of Excellence for Anaerobic Digestion, University of South Wales, Pontypridd, CF37 1DL, UK. Electronic address: ivo.oliveira@southwales.ac.uk., Reed JP; Sustainable Environmental Research Centre, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, CF37 1DL, UK. Electronic address: james.reed@southwales.ac.uk., Abu-Orf M; Hazen and Sawyer, Vice President & Residuals Group Practice Leader, One South Broad Street, Suite 1630, Philadelphia, PA 19107, USA. Electronic address: mabuorf@hazenandsawyer.com., Wilson V; Welsh Water, Nelson, Treharris CF46 6LY, UK. Electronic address: victoria.wilson@dwrcymru.com., Jones D; Welsh Water, Nelson, Treharris CF46 6LY, UK. Electronic address: dean.jones@dwrcymru.com., Esteves SR; Wales Centre of Excellence for Anaerobic Digestion, University of South Wales, Pontypridd, CF37 1DL, UK. Electronic address: sandra.esteves@southwales.ac.uk.
Jazyk: angličtina
Zdroj: Water research [Water Res] 2016 Nov 15; Vol. 105, pp. 320-330. Date of Electronic Publication: 2016 Sep 02.
DOI: 10.1016/j.watres.2016.08.007
Abstrakt: The work assessed the use of shear viscosity at 0.1 s -1 ( [Formula: see text] ) as a parameter to detect changes in the conditioning and dewatering of digestates. Total and soluble fractions of organic matter of digestate samples before and after storage were also assessed in regards to their conditioning and dewatering performance. Digestate from a conventional mesophilic anaerobic digestion (CMAD) and advanced anaerobic digestion (AAD) plants were used. Linear regression and correlation analysis of 29 different parameters showed that soluble and total fractions of organic matter (N org , Sc, Sp, Tp, TKN/COD, tCOD and sCOD) during plant operation and storage conditions correlated (r between 0.80 and 0.99) with the variation in polymer dose, floc strength and CST of conditioned digestate samples. The variations occurred within the content of soluble and total fractions of organic matter, and showed to correlate with both conditioning requirements and the variation in [Formula: see text] . The work concluded that [Formula: see text] measurements of unconditioned digestate samples have the potential to be used as a parameter to monitor conditioning requirements during digestate storage or during process changes. It was found important to analyse soluble and total fractions of organic matter in order to understand the changes in [Formula: see text] within specific process conditions.
(Copyright © 2016 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: