Record nummer 2253255
Titel artikel Effect of humic acids on batch anaerobic digestion of excess sludge
Auteur(s) Li, J. ; Loosdrecht, M.C.M. van ; Luo, Y. ; Cao, D.
Tijdschrifttitel Water research : the journal of the International Association on Water Quality
Deel(Jaar)Nummer (2019)155
Paginering 431 - 443
Online full text
Publicatie type Artikel
Taal Engels
Toelichting (Engels) Anaerobic digestion (AD) is a sustainable pathway towards recovering chemical energy from excess sludge, and humic substances (HSs) contained in sludge can inhibit energy (methane/CH4) conversion efficiency. This study aims to investigate the impact of humic acids (HA) on the various processes in a batch anaerobic digestion process. For this purpose, “clean” sludge was cultivated in a laboratory to avoid HSs presence. The cultivated sludge was used in a series of batch experiments, with humic acids added at different levels. A complete AD test, as well as three sub-phase tests (hydrolytic phase; acidogenic phase; methanogenic phase) was performed and analyzed with and without HA dosing. In the single-phase AD system, dosing with HA inhibited the methanogenic efficiency by 35.1% at HA:VSS =15%.
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