Comparison between disintegrated and fermented sewage sludge for production of a carbon source suitable for biological nutrient removal

Journal of Hazardous Materials
Ana SoaresE Cartmell

Abstract

There is a need to investigate processes that enable sludge re-use while enhancing sewage treatment efficiency. Mechanically disintegrated thickened surplus activated sludge (SAS) and fermented primary sludge were compared for their capacity to produce a carbon source suitable for BNR by completing nutrient removal predictive tests. Mechanically disintegration of SAS using a deflaker enhanced volatile fatty acids (VFAs) content from 92 to 374 mg l(-1) (4.1-fold increase). In comparison, primary sludge fermentation increased the VFAs content from 3.5 g l(-1) to a final concentration of 8.7 g l(-1) (2.5-fold increase). The carbon source obtained from disintegration and fermentation treatments improved phosphate (PO(4)-P) release and denitrification by up to 0.04 mg NO(3)-Ng(-1)VSS min(-1) and 0.031 mg PO(4)-Pg(-1)VSS min(-1), respectively, in comparison to acetate (0.023 mg NO(3)-Ng(-1)VSS min(-1)and 0.010 mg PO(4)-Pg(-1)VSS min(-1)). Overall, both types of sludge were suitable for BNR but disintegrated SAS displayed lower carbon to nutrient ratios of 8 for SCOD:PO(4)-P and 9 for SCOD:NO(3)-N. On the other hand, SAS increased the concentration of PO(4)-P in the settled sewage by a further 0.97 g PO(4)-P kg(-1)SCOD indicating its ...Continue Reading

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Citations

Mar 6, 2012·Journal of Hazardous Materials·Yiming LinYixiao Lin
May 9, 2016·Journal of Environmental Sciences (China)·Baodan JinYongzhen Peng
Jul 6, 2015·Water Research·Y Bajón FernándezE Cartmell
Sep 26, 2014·Environmental Technology·Joanna RodziewiczSylwia Duchniewicz
Apr 21, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·M Zubrowska-Sudol
Feb 28, 2018·Environmental Science and Pollution Research International·Liang GuoZonglian She
Jan 10, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Nilüfer Ülgüdür, Göksel Niyazi Demirer
May 15, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·J Walczak, M Zubrowska-Sudol
Jul 28, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Yonglei WangYao Qin
Dec 6, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Priyanka AliHaydée De Clippeleir
Jul 19, 2020·Colloids and Surfaces. B, Biointerfaces·Guangzhi WangMaoan Du
Jul 18, 2021·The Science of the Total Environment·Gholamreza BahreiniGeorge Nakhla

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