Influence of PH, Heat Treatment of Inoculum, and Selenium Oxyanions on Concomitant Selenium Bioremediation and Volatile Fatty Acid Production from Food Waste

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2023 Oct 2

PMID 37779932

Authors

Mohanakrishnan Logan

Fengyi Zhu

Piet N L Lens

Zeynep Cetecioglu

Affiliations

Soon will be listed here.

Abstract

Developing novel strategies to enhance volatile fatty acid (VFA) yield from abundant waste resources is imperative to improve the competitiveness of biobased VFAs over petrochemical-based VFAs. This study hypothesized to improve the VFA yield from food waste via three strategies, viz., pH adjustment (5 and 10), supplementation of selenium (Se) oxyanions, and heat treatment of the inoculum (at 85 °C for 1 h). The highest VFA yield of 0.516 g COD/g VS was achieved at alkaline pH, which was 45% higher than the maximum VFA production at acidic pH. Heat treatment resulted in VFA accumulation after day 10 upon alkaline pretreatment. Se oxyanions acted as chemical inhibitors to improve the VFA yield at pH 10 with non-heat-treated inoculum (NHT). Acetic and propionic acid production was dominant at alkaline pH (NHT); however, the VFA composition diversified under the other tested conditions. More than 95% Se removal was achieved on day 1 under all the conditions tested. However, the heat treatment was detrimental for selenate reduction, with less than 15% Se removal after 20 days. Biosynthesized Se nanoparticles were confirmed by transmission and scanning electron microscopy and and energy dispersive X-ray analyses. The heat treatment inhibited the presence of nonsporulating bacteria and methanogenic archaea (). High-throughput sequencing also revealed higher relative abundances of the bacterial families (such as , , and ) that are capable of VFA production and/or selenium reduction.

References

Khatami K, Atasoy M, Ludtke M, Baresel C, Eyice O, Cetecioglu Z . Bioconversion of food waste to volatile fatty acids: Impact of microbial community, pH and retention time. Chemosphere. 2021; 275:129981. DOI: 10.1016/j.chemosphere.2021.129981. View

Owusu-Agyeman I, Plaza E, Cetecioglu Z . Production of volatile fatty acids through co-digestion of sewage sludge and external organic waste: Effect of substrate proportions and long-term operation. Waste Manag. 2020; 112:30-39. DOI: 10.1016/j.wasman.2020.05.027. View

Webster T, Smith A, Reddy R, Pinto A, Hayes K, Raskin L . Anaerobic microbial community response to methanogenic inhibitors 2-bromoethanesulfonate and propynoic acid. Microbiologyopen. 2016; 5(4):537-50. PMC: 4985588. DOI: 10.1002/mbo3.349. View

Karekar S, Stefanini R, Ahring B . Homo-Acetogens: Their Metabolism and Competitive Relationship with Hydrogenotrophic Methanogens. Microorganisms. 2022; 10(2). PMC: 8875654. DOI: 10.3390/microorganisms10020397. View

Carrere H, Antonopoulou G, Affes R, Passos F, Battimelli A, Lyberatos G . Review of feedstock pretreatment strategies for improved anaerobic digestion: From lab-scale research to full-scale application. Bioresour Technol. 2015; 199:386-397. DOI: 10.1016/j.biortech.2015.09.007. View

Atasoy M, Eyice O, Schnurer A, Cetecioglu Z . Volatile fatty acids production via mixed culture fermentation: Revealing the link between pH, inoculum type and bacterial composition. Bioresour Technol. 2019; 292:121889. DOI: 10.1016/j.biortech.2019.121889. View

Atasoy M, Eyice O, Cetecioglu Z . A comprehensive study of volatile fatty acids production from batch reactor to anaerobic sequencing batch reactor by using cheese processing wastewater. Bioresour Technol. 2020; 311:123529. DOI: 10.1016/j.biortech.2020.123529. View

Chi X, Liu Z, Wang H, Wang Y, Xu B, Wei W . Regulation of a New Type of Selenium-Rich Royal Jelly on Gut Microbiota Profile in Mice. Biol Trace Elem Res. 2021; 200(4):1763-1775. DOI: 10.1007/s12011-021-02800-4. View

Maddela N, Zhou Z, Yu Z, Zhao S, Meng F . Functional Determinants of Extracellular Polymeric Substances in Membrane Biofouling: Experimental Evidence from Pure-Cultured Sludge Bacteria. Appl Environ Microbiol. 2018; 84(15). PMC: 6052268. DOI: 10.1128/AEM.00756-18. View

10.

Owusu-Agyeman I, Plaza E, Cetecioglu Z . Long-term alkaline volatile fatty acids production from waste streams: Impact of pH and dominance of Dysgonomonadaceae. Bioresour Technol. 2021; 346:126621. DOI: 10.1016/j.biortech.2021.126621. View

11.

Gonzalez-Gil G, Lens P, Saikaly P . Selenite Reduction by Anaerobic Microbial Aggregates: Microbial Community Structure, and Proteins Associated to the Produced Selenium Spheres. Front Microbiol. 2016; 7:571. PMC: 4844624. DOI: 10.3389/fmicb.2016.00571. View

12.

Wang G, Wang D, Huang L, Song Y, Chen Z, Du M . Enhanced production of volatile fatty acids by adding a kind of sulfate reducing bacteria under alkaline pH. Colloids Surf B Biointerfaces. 2020; 195:111249. DOI: 10.1016/j.colsurfb.2020.111249. View

13.

Lukitawesa , Patinvoh R, Millati R, Sarvari-Horvath I, Taherzadeh M . Factors influencing volatile fatty acids production from food wastes via anaerobic digestion. Bioengineered. 2019; 11(1):39-52. PMC: 7571609. DOI: 10.1080/21655979.2019.1703544. View

14.

Wang H, Li X, Wang Y, Tao Y, Lu S, Zhu X . Improvement of n-caproic acid production with Ruminococcaceae bacterium CPB6: selection of electron acceptors and carbon sources and optimization of the culture medium. Microb Cell Fact. 2018; 17(1):99. PMC: 6019802. DOI: 10.1186/s12934-018-0946-3. View

15.

Perez-Zabaleta M, Atasoy M, Khatami K, Eriksson E, Cetecioglu Z . Bio-based conversion of volatile fatty acids from waste streams to polyhydroxyalkanoates using mixed microbial cultures. Bioresour Technol. 2021; 323:124604. DOI: 10.1016/j.biortech.2020.124604. View

16.

Hobbs S, Landis A, Rittmann B, Young M, Parameswaran P . Enhancing anaerobic digestion of food waste through biochemical methane potential assays at different substrate: inoculum ratios. Waste Manag. 2017; 71:612-617. DOI: 10.1016/j.wasman.2017.06.029. View

17.

McHugh A, Feehily C, Hill C, Cotter P . Detection and Enumeration of Spore-Forming Bacteria in Powdered Dairy Products. Front Microbiol. 2017; 8:109. PMC: 5281614. DOI: 10.3389/fmicb.2017.00109. View

18.

Dahiya S, Sarkar O, Swamy Y, Venkata Mohan S . Acidogenic fermentation of food waste for volatile fatty acid production with co-generation of biohydrogen. Bioresour Technol. 2015; 182:103-113. DOI: 10.1016/j.biortech.2015.01.007. View

19.

Martins M, Faleiro M, Barros R, Verissimo A, Costa M . Biological sulphate reduction using food industry wastes as carbon sources. Biodegradation. 2009; 20(4):559-67. DOI: 10.1007/s10532-008-9245-8. View

20.

Khatami K, Perez-Zabaleta M, Cetecioglu Z . Pure cultures for synthetic culture development: Next level municipal waste treatment for polyhydroxyalkanoates production. J Environ Manage. 2021; 305:114337. DOI: 10.1016/j.jenvman.2021.114337. View