Iron foam coupled hydrolysis acidification for trichloroacetaldehyde treatment: Strengthening characteristics and mechanism

Tian, Xiangmiao; Jin, Xiaoguang; Wang, Jie; Shen, Zhiqiang; Zhou, Yuexi; Wang, Kaijun

doi:10.1016/j.biortech.2021.126047

Cited by 12 publications

(4 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the respective DHA values of R Rusty and R Clean systems were 50.47 and 38.26% higher than those in the control group. Tian et al (2021) and Wang et al (2021) demonstrated that iron foam and Fe/C can facilitate dehydrogenase secretion and improve the microbial activity, respectively. These results suggested that iron dosing enhances DHA and thus improves the microorganism activity.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the continuously generated layer of rusty iron composed of iron oxides can also play an important role in the enrichment of DIRB in the R Rusty system. In terms of R Clean system, Tian et al (2021) showed that sludge can facilitate iron oxidation to generate iron oxides, thereby indicating that trace contents of iron oxides produced by microbial corrosion may be the main reason for the DIRB abundance of 0.75% but is negligible compared with the R Rusty system.…”

Section: Resultsmentioning

confidence: 99%

“…Fe was the main form on the surface of clean iron scraps before usage, while FeOOH, Fe, and C 48 H 44 Fe 14 N 15 O 35 S 2 H 2 O were dominant on the surface of clean iron scraps after usage. Guo et al (2020) and Tian et al (2021) reported the existence of FeOOH when iron foam and Fe(II) coupled in the biological systems. These results indicated that sludge can facilitate the oxidation of iron scraps.…”

Section: Resultsmentioning

confidence: 99%

“…The pH level was monitored using a pH meter (PHSJ-3F). Tian et al (2021) determined the concentrations of Fe 2+ using phenanthroline spectrophotometry. Molecular weights and their distributions were examined via gel chromatography (Aglient 1260).…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Performance and mechanisms of enhanced hydrolysis acidification by adding different iron scraps: Microbial characteristics and fate of iron scraps

Wang

Jin

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

HA, as one of low-carbon pre-treatment technology could be enhanced by packing of iron or iron oxide powder for enhancing the transformation of large molecular weight to generate volatile fatty acids (VFAs) for fuel production. However, the controversy of iron strengthening the HA and inherent drawbacks of iron oxide, such as poor mass transfer, and difficult recovery, limit this pretreatment technology. Clean and rusty iron scraps were packed into an HA system to address these issues while focusing on the system performance and the response of core bacterial and fungal microbiomes to iron scrap exposure. Results showed that clean and rusty iron scraps can significantly improve the HA performance while considering hydrolysis efficiency (HE), acidification efficiency (AE) and VFAs production, given that VFAs ratios (Cacetate: Cpropionate: Cbutyrate) were changed from the 14:5:1 to 14:2:1 and 29:4:1, respectively, and the obtained VFAs ratios in iron scraps addition systems were more closely to the optimal VFAs ratio for lipids production. Redundant and molecular ecological network analyses indicated that iron scraps promote the system stability and acidogenesis capacity by boosting the complexity of microbes’ networks and enriching core functional microbes that show a positive response to HA performance, among which the relative abundance of related bacterial genera was promoted by 19.71 and 17.25% for RRusty and RClean systems. Moreover, except for the differences between the control and iron scraps addition systems, the findings confirmed that the RRusty system is slightly different from the RClean one, which was perhaps driven by the behavior of 6.20% of DIRB in RRusty system and only 1.16% of homoacetogens in RClean system when considering the microbial community and fate of iron scraps. Totally, the observed results highlight the application potential of the iron scrap-coupled HA process for the generation of VFAs and provide new insights into the response of different iron scraps in microbes communities.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%