Coupling of Fe-C and aerobic granular sludge to treat refractory wastewater from a membrane manufacturer in a pilot-scale system

Guo, Tao; Yu, Jaecheul; Zhao, Jiang; Horn, Harald; Li, Jun

doi:10.1016/j.watres.2020.116331

Cited by 43 publications

(5 citation statements)

References 57 publications

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“…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%

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.

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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.

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Section: Resultsmentioning

confidence: 99%

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.

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“…10,11 Furthermore, it is worth mentioning that microorganisms are domesticated into obligate bacteria for different types of wastewater. However, studies on the bio-ZVI process have mainly focused on degradation effects, 12,13 with little attention paid to the growth characteristics of acclimated microbes. Furthermore, the consistency of operating conditions for acclimated microorganisms was not described in depth.…”

Section: Introductionmentioning

confidence: 99%

Degradation of different wastewater by a biological sponge iron system: microbial growth and influencing factors

Xie,

Zhao,

et al. 2024

RSC Adv.

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“…Aerobic granular sludge (AGS) is an attractive biotechnology for wastewater treatment that has been extensively studied in recent years [1][2][3]. Aerobic granulation is a progressive evolution process evolving from fluffy flocs to dense and compact granules under controlled operating conditions [4].…”

Section: Introductionmentioning

confidence: 99%

Understanding the role of polyurethane sponges on rapid formation of aerobic granular sludge and enhanced nitrogen removal

Zou

Yang

et al. 2023

Chemical Engineering Journal

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Coupling of Fe-C and aerobic granular sludge to treat refractory wastewater from a membrane manufacturer in a pilot-scale system

Cited by 43 publications

References 57 publications

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

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

Degradation of different wastewater by a biological sponge iron system: microbial growth and influencing factors

Understanding the role of polyurethane sponges on rapid formation of aerobic granular sludge and enhanced nitrogen removal

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