Influence of NaOH and thermal pretreatment on dewatered activated sludge solubilisation and subsequent anaerobic digestion: Focused on high-solid state

Bioresource Technology
Shuting ZhangKeqiang Zhang

Abstract

In this study, the influence of NaOH and thermal pretreatment of dewatered activated sludge (DAS) on the high-solid solubilisation and anaerobic digestion was separately investigated by monitoring common parameters. The results indicated that COD, proteins and carbohydrates were efficiently solubilised in both NaOH and thermal pretreated DAS samples. For NaOH pretreatment, the concentrations of volatile fatty acids (VFAs) and total ammonium nitrogen (TAN) firstly increased followed by decreasing with NaOH dose increasing. However, they decreased with the severity of thermal pretreatment. During the batch digestion experiments (at 37°C), for 80mg NaOHg(-1) total solid (TS) DAS pretreatment it resulted in a 6.99% decrease in cumulative methane yield (CMY) compared to untreated DAS. While for 80, 100, 120°C and 20mg NaOH pretreatment, CMY increased by 15%, 42%, 71% and 35%, respectively, in comparison to untreated DAS.

References

Nov 26, 2008·Water Science and Technology : a Journal of the International Association on Water Pollution Research·J GuendouzJ-P Delgenes
May 14, 2011·Journal of Environmental Management·Dimitrios KomilisEvangelos Voudrias
Sep 4, 2012·Bioresource Technology·Huan LiShuxin Zou
Apr 17, 2013·Ultrasonics Sonochemistry·Ngoc Tuan LeHenri Delmas
May 22, 2013·Bioresource Technology·Huan LiYiying Jin

❮ Previous
Next ❯

Citations

Feb 28, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Klaudiusz GrübelMiroslav Černík
Jan 7, 2020·Environmental Science and Pollution Research International·Jianlei GaoManli Chen
Jul 11, 2019·Environmental Science and Pollution Research International·Alicja MachnickaKrzysztof Sikora
Jul 25, 2021·Bioresource Technology·Yuexi ChenYinguang Chen

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofuels (ASM)

Biofuels are produced through contemporary processes from biomass rather than geological processes involved in fossil fuel formation. Examples include biodiesel, green diesel, biogas, etc. Discover the latest research on biofuels in this feed.