Microbial response during treatment of different types of landfill leachate in a semi-aerobic aged refuse biofilter

Wen, Peng; Huang, Yuyu; Qiu, Zhongping; Li, Qibin

doi:10.1016/j.chemosphere.2020.127822

Cited by 35 publications

(9 citation statements)

References 36 publications

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“…Van Houghton et al [37] also reported that the relative abundance of the genera Roseovarius and Iodidimonas was more than 50% in PW treated in a membrane bioreactor. Iodidimonas species were also found to be the predominant bacteria in landfill leachate treated in a semi-aerobic aged refuse biofilter [38]. Furthermore, the relative abundances of Iodidimonas and uncultured Iodidimonadaceae-related bacteria were 2% and 7%, respectively, in the Karmadon springs, a geothermal site in North Caucasus [39].…”

Section: Habitat and Distribution Of Iodidimonas In Naturementioning

confidence: 90%

The Genus Iodidimonas: From Its Discovery to Potential Applications

Amachi

Iino

2022

Microorganisms

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The genus Iodidimonas was recently proposed in the class Alphaproteobacteria. Iodidimonas strains are aerobic, mesophilic, neutrophilic, moderately halophilic, and chemo-organotrophic. They were first discovered in natural gas brine water containing a very high level of iodide (I−). They exhibited a unique phenotypic feature of iodide oxidation to form molecular iodine (I2). Iodidimonas was also enriched and isolated from surface seawater supplemented with iodide, and it is clearer now that their common habitats are those enriched with iodide. In such environments, Iodidimonas species seem to attack microbial competitors with the toxic form I2 to occupy their ecological niche. The iodide-oxidizing enzyme (IOX) purified from the Iodidimonas sp. strain Q-1 exhibited high catalytic efficiency for iodide and consisted of at least two proteins IoxA and IoxC. IoxA is a putative multicopper oxidase with four conserved copper-binding regions but is phylogenetically distinct from other bacterial multicopper oxidases. The IOX/iodide system could be used as a novel enzyme-based antimicrobial system which can efficiently kill Bacillus spores. Furthermore, the IOX/iodide system can be applied to the decolorization of recalcitrant dyes, where iodide may function as a novel inorganic natural redox mediator.

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Section: Habitat and Distribution Of Iodidimonas In Naturementioning

confidence: 90%

The Genus Iodidimonas: From Its Discovery to Potential Applications

Amachi

Iino

2022

Microorganisms

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“…[ 38 ] Deinococcus‐Thermus can degrade organic matter and oxidize NH 4 + ‐N through nitrification in harsh environments. [ 39 ]…”

Section: Resultsmentioning

confidence: 99%

“…[38] Deinococcus-Thermus can degrade organic matter and oxidize NH 4 + -N through nitrification in harsh environments. [39] The main orders and genera with relative abundances >1% were further analyzed, and the results are shown in Figure 6B and C. In the photic SBR, there were 15 main genera, with a total relative abundance of 80.07%. Thauera classified in the order Rhodocyclales and class β-Proteobacteria was the most abundant, with a relative abundance of 39.35%, followed by an unclassified genus (6.91%) in the order Flavobacteriales and phylum Bacteroidetes, and an unclassified genus (6.14%) in the order Cytophagales and phylum Bacteroidetes.…”

Section: Bacterial Community Structurementioning

confidence: 99%

Potential positive effects of natural sunlight on a biological system for landfill leachate treatment

Cai

2023

CLEAN Soil Air Water

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Activated sludge filtration performance is a significant mean to evaluate membrane fouling trend for wastewater treatment. Here the impact of sunlight irradiation on activated sludge filtration performance and microbial communities in sequencing batch reactors (SBRs) when treating raw landfill leachate were studied. The sludge in photic SBR (i.e., SBR exposed to natural sunlight) exhibited better filtration performance compared to dark SBR (i.e., SBR unexposed to sunlight). The removal efficiency of COD and NH4+‐N in the photic SBR were slightly higher than those in the dark SBR. The contents of the extracellular polymeric substances (EPSs) of sludge in both SBRs initially increased and then decreased. However, in the later period, the sludge filtration performance worsened due to the fungal activity in the dark SBR. Natural sunlight irradiation promoted sludge filtration performance by affecting the microorganism structure in the photic SBR. The bacterial genus Thauera was dominant in the photic SBR (39.35%), whereas Planktosalinus and Ottowia were dominant in the dark SBR (16.84% and 12.55%, respectively). Natural sunlight irradiation had a prominent effect on the fungal diversity in the system, and filamentous bulking caused by the fungi genus Trichosporon’s proliferation was observed in the dark SBR but not in the photic SBR, which also increased the polysaccharide content.

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“…Biological processes have been widely applied in the treatment of various wastewaters, including municipal wastewater (Vergine et al, 2021; Wang et al, 2021b), chemical industry wastewater (Paździor et al, 2019; Zhang et al, 2019), pharmaceutical wastewater (Changotra et al, 2020; Nguyen et al, 2021) and landfill leachate (Chen et al, 2020d; Gu et al, 2020b; Wen et al, 2021). A promising landfill leachate treatment is the semi-aerobic aged refuse biofilter method, which has been successfully tested at a pilot scale (Chen et al, 2020c; Han et al, 2011; He et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Treatment of refractory organics in biologically treated landfill leachate by a zero valent iron enhanced Peroxone process: Degradation efficiency and mechanism study

Bai

Yang

2022

Waste Manag Res

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A zero valent iron (ZVI) enhanced Peroxone process (ZVI/Peroxone) was used to treat biologically treated landfill leachate (BTL). The treatment efficiency of the ZVI/Peroxone process was compared to single (ZVI, O3 and H2O2) and dual (ZVI/H2O2, Fe0/O3 and Peroxone) processes. The results showed that ZVI can greatly enhance the treatment capability of the Peroxone process, and the color number (CN), absorbance at 254 nm (UV254), and total organic carbon (TOC) removal efficiencies were 98.82, 84.30 and 66.38%, respectively. In the ZVI/Peroxone process, higher O3 and ZVI dosages improved organics removal, and H2O2 could promote organics removal within a certain dosage range. However, too much H2O2 decreased treatment efficiency. The best treatment performance by the ZVI/Peroxone process was obtained under acidic conditions. The three-dimensional excitation and emission matrix analysis showed that BTL mainly contained two fluorescent substances, which were fulvic-like substances in the ultraviolet region (Ex/Em = 235–255 nm/410–450 nm) and fulvic-like substances in the visible light region (Ex/Em = 310–360 nm/370–450 nm). Fluorescent substances could be substantially degraded by the ZVI/Peroxone process during the early stages of the reaction. An analysis of ZVI morphology and element valency changes showed that the micro Fe0 particles used in this study remained highly reactive during the process. The ZVI enhanced the homogenous Fenton, heterogeneous Fenton, and coagulation-flocculation effects during the Peroxone process.

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Microbial response during treatment of different types of landfill leachate in a semi-aerobic aged refuse biofilter

Cited by 35 publications

References 36 publications

The Genus Iodidimonas: From Its Discovery to Potential Applications

The Genus Iodidimonas: From Its Discovery to Potential Applications

Potential positive effects of natural sunlight on a biological system for landfill leachate treatment

Treatment of refractory organics in biologically treated landfill leachate by a zero valent iron enhanced Peroxone process: Degradation efficiency and mechanism study

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