An evaluation of protocols for characterization of ozone impacts on WAS properties and digestibility

Bioresource Technology
Peiman KianmehrPeter Seto

Abstract

Waste activated sludge (WAS) samples that were generated over a range of solids residence times (SRTs) were employed in bench scale ozonation tests to evaluate the impact of ozonation, on physical, chemical and biochemical properties of WAS and digestibility. Solubilization responses suggested that the types of solubilized materials were affected by the ozone dose and the SRT of WAS. The results obtained from biochemical methane potential (BMP) showed that ozonation did not considerably increase the ultimate digestibility of shorter SRT sludges while a high dose caused a substantial increase in the digestibility of a 15 day SRT sludge. The biochemical acid potential (BAP) tests as a shorter term test (10 days) than the BMP (55 days) test could provide information on hydrolysis and acidification/ammonification rates. The results revealed that ozonation substantially increased the rate of hydrolysis which is often the rate limiting process in WAS digestion.

References

Oct 20, 2005·Journal of Bioscience and Bioengineering·Jeongsik KimJinwon Lee

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Citations

Feb 24, 2016·Environmental Science and Pollution Research International·Jian ZhangWei Zuo
May 29, 2012·Waste Management·My CarlssonFernando Morgan-Sagastume
Mar 1, 2012·Chemosphere·Chia-Jung ChengCheng-Fang Lin
Oct 6, 2017·Applied Biochemistry and Biotechnology·Michela LangoneGianni Andreottola
Apr 2, 2020·Environmental Science and Pollution Research International·Chunsheng QiuLiping Sun
Jun 6, 2019·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Ruben Teixeira FrancoPierre Buffière

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