Insights on the solubilization products after combined alkaline and ultrasonic pre-treatment of sewage sludge

Journal of Environmental Sciences (China)
Xinbo TianWun Jern Ng

Abstract

This work provides insights on the solubilization products after a simultaneous combination of alkaline and ultrasonic (ALK+ULS) pre-treatment of sewage sludge. Soluble chemical oxygen demand (SCOD) increased from 1200 to 11,000 mg/L after such treatment. Organics with molecular weight around 5.6 kDa were solubilized because of the synergistic effect of ultrasound and alkali. Organics with molecular weight larger than 300 kDa increased from 7.8% to 60%, 16% and 42.3% after ULS, ALK and ALK+ULS treatment, respectively. Excitation emission matrix fluorescence spectroscopy analysis identified soluble microbial product-like and humic acid-like matters as the main solubilization products. Sludge anaerobic biodegradability was significantly enhanced with the simultaneous application of ALK+ULS pre-treatment. ALK+ULS pre-treatment resulted in 37.8% biodegradability increase compared to the untreated sludge. This value was higher compared to the biodegradability increase induced by individual ALK pre-treatment (5.7%) or individual ULS pre-treatment (20.7%) under the same conditions applied.

References

Feb 8, 2003·Journal of Hazardous Materials·E NeyensC Creemers
May 3, 2003·Water Research·Mario Esparza-Soto, Paul Westerhoff
Jul 5, 2005·Journal of Hazardous Materials·Fen WangMin Ji
Oct 20, 2005·Journal of Bioscience and Bioengineering·Jeongsik KimJinwon Lee
Jul 29, 2009·Journal of Environmental Sciences (China)·Yiying JinYongfeng Nie
Mar 23, 2010·Water Research·Dong-Hoon KimHang-Sik Shin
Apr 30, 2010·Environmental Technology·Bunrith SengChettiyappan Visvanathan

❮ Previous
Next ❯

Citations

Jan 10, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Antoine Prandota TrzcinskiWun Jern Ng
Jan 27, 2021·Environmental Science and Pollution Research International·Kaiyan YangZiyang Lou
Mar 27, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Qing TianSand Wolfgang
Jun 30, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Tales Abreu Tavares de SousaJosé Tavares de Sousa
Jul 20, 2021·Environmental Science and Pollution Research International·Grzegorz IzydorczykKatarzyna Chojnacka

❮ 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.

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.