Abstract:
:The aim of this work was to study the effects of plastics (high-density polyethylene (HDPE), polystyrene (PS), polypropylene (PP), and polyethylene terephthalate (PET)) on reactor performance and microbial communities during acidogenic fermentation of food waste for the production of volatile fatty acids (VFA). The addition of HDPE and PS increased total VFA yields by 28% and 47%, respectively, whereas the addition of PP and PET decreased total VFA yields by 6% and 2%, respectively. The highest enhancing performance of PS could be ascribed to its highly porous structure that could provide immobilization effects for microbial growth. Degradation of various plastics was confirmed by FESEM results, but the degrees were limited (i.e., 3.9-8.7%). Bacterial analysis showed that the addition of various plastics altered the community diversity. Phylum Thermotogae and genus Defluviitoga dominated all the reactors. Potential HDPE- and PS-degrading microbes could belong to genus Clostridium_sensu_stricto_8, while Tepidanaerobacter_syntrophicus could be PET-degrading microbes.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang L,Tsui TH,Loh KC,Dai Y,Tong YWdoi
10.1016/j.biortech.2021.125481keywords:
["Acidogenic fermentation","Microbial analysis","Plastic biodegradation","Plastic-containing food waste","Resource recovery"]subject
Has Abstractpub_date
2021-10-01 00:00:00pages
125481eissn
0960-8524issn
1873-2976pii
S0960-8524(21)00821-Xjournal_volume
337pub_type
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