Enhanced degradation of dicamba by an anaerobic sludge acclimated from river sediment

Liu, Junwei; Zhang, Xuan; Bao, Yixuan; Chen, Yinran; Qiu, Jiguo; He, Qin; Zhu, Jianqing; He, Jian

doi:10.1016/j.scitotenv.2021.145931

Cited by 31 publications

(18 citation statements)

References 28 publications

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“…The species norank_f__Anaerolineaceae and Longilinea can degrade various carbohydrates for VFA production and were, respectively, enriched from the abundances of 1.28% and 0.87 to 1.64% and 1.55% by the KMnO 4 pretreatment. The abundance of Exilispira, a species that was reported to be connected with the medium chain fatty acid (MCFA) generation in anaerobic digestion and to possess the ability to degrade recalcitrant dicamba, , was increased from 0.52 to 1.08% when pretreated by KMnO 4 . The abundance of norank_f__Cloacimonadaceae, an acetogenic bacterium that can convert propionate into acetic acid, , was increased from 1.16 to 1.78% after the KMnO 4 pretreatment.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Methane Production from Sludge Anaerobic Digestion with the Addition of Potassium Permanganate

Tang

2022

ACS Omega

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This work aims to reveal the effect of potassium permanganate (KMnO 4 ) on the sludge anaerobic digestion process, as well as the relevant mechanisms. Experimental data showed that the biomethane production was gradually increased from 159.3 ± 3.0 to 211.5 ± 5.1 mL/g VSS (volatile suspended solids) when the KMnO 4 content was increased from 0 to 0.08 g/g VSS, with an increasing rate of 32.8%. A further increase in the KMnO 4 dosage however resulted in the decline of the methane yield. First-order kinetic model analysis indicated that higher methane production potentials and hydrolysis rates were achieved in KMnO 4 -added reactors than in the control. Mechanism analysis demonstrated that KMnO 4 not only efficiently disintegrated the sludge flocs, which resulted in the increased contents of dissolved organics, but also enhanced the proportion of biodegradable substances in the sludge liquor. Meanwhile, the biodegradabilities of recalcitrant humus and lignocellulose substances were found to be promoted by KMnO 4 treatment as higher methane yields were attained from KMnO 4 -treated model substrates. 16S rRNA analysis illustrated that the functional microbes participated in anaerobic digestion were largely enriched in the KMnO 4 -pretreated digestor. Furthermore, efficient inactivation of the fecal coliform was achieved by KMnO 4 pretreatment.

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Section: Resultsmentioning

confidence: 99%

Enhanced Methane Production from Sludge Anaerobic Digestion with the Addition of Potassium Permanganate

Tang

2022

ACS Omega

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“…The analytical method of CAAHs by HPLC was described previously . Concentrations of Cl – and SO 4 2– were measured using an ICS-1100 ion chromatograph (IC, Dionex Aquion, Thermo Fisher Scientific, MA, USA) coupled with a Dionex IonPac AS23 anion-exchange column (4 × 100 mm) at a flow rate of 1.0 mL·min –1 .…”

Section: Methodsmentioning

confidence: 99%

“…The S 2‑ concentration was measured with the iodometric method as described by Konovalov and Romanov . A liquid chromatograph coupled with a triple quadrupole time-of-flight mass spectrometer (QTOF–MS) was used to measure the intermediate metabolites of acetochlor as previously described …”

Section: Methodsmentioning

confidence: 99%

Sulfate-Dependent Anaerobic Degradation of Herbicide Acetochlor by a Sulfate-Reducing Bacterium Cupidesulfovibrio sp. SRB-5

Liu

Zhao

et al. 2022

J. Agric. Food Chem.

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Acetochlor, an important chloroacetamide herbicide (CAAH) widely used in agriculture, has resulted in environmental contamination, especially of anoxic habitats. In this study, a sulfate-reducing bacterium, designated as SRB-5, was isolated from anaerobic activated sludge and was identified as Cupidesulfovibrio sp. This bacterium possesses a novel anaerobic pathway capable of degrading acetochlor. In this pathway, sulfate is first reduced to sulfide, which attacks the C–Cl bond of acetochlor and abiotically forms acetochlor-thioalcohol and dis-S-acetochlor. These further undergo microbial degradation, producing the intermediates acetochlor ethanesulfonic acid, 2-methyl-6-ethylaniline, and 2-ethylaniline. The degradation half-times of acetochlor (100 μM) by strain SRB-5 were 2.4 and 4.2 days in industrial wastewater and paddy sludge, respectively. Strain SRB-5 could also degrade alachlor, propisochlor, butachlor, pretilachlor, and metolachlor, and the degradation kinetics fit the pseudo-first-order kinetics equation. This work highlights the potential application of strain SRB-5 for the remediation of CAAHs-contaminated sites.

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“…The mobile phase consisted of acetonitrile, water, acetic acid (50: 49: 1 [vol/vol/vol]) at a flow rate of 0.8 mL/min and a column temperature of 40 • C. A VWD-3100 single-wavelength detector was used to monitor the UV absorption with the detection wavelengths being 240 nm, the injection volume is 20 µL. To detect the catabolic metabolites of cypermethrin or 3-PBA, the sample was dissolved in methanol and analyzed by LC-TOF-MS as described by Liu et al (2021).…”

Section: Chemical Analysismentioning

confidence: 99%

Highly efficient degradation of cypermethrin by a co-culture of Rhodococcus sp. JQ-L and Comamonas sp. A-3

Chen

Wang³

et al. 2022

Front. Microbiol.

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Cypermethrin is an important synthetic pyrethroid pesticide that widely used to control pests in agriculture. However, extensive use has caused its residue and the metabolite 3-phenoxybenzoic acid (3-PBA) to seriously pollute the environments and agricultural products. In this study, a highly efficient cypermethrin-degrading bacterial consortium was acclimated from long-term pyrethroid-contaminated soil. Two strains, designated JQ-L and A-3, were screened from the consortium, and identified as Rhodococcus sp. and Comamonas sp., respectively. Strain JQ-L transformed 100 mg/L of cypermethrin to 3-PBA within 60 h of incubation; however, 3-PBA could not be further degraded by the strain. Strain A-3 utilized 3-PBA as sole carbon for growth, and completely degraded 100 mg/L of 3-PBA within 15 h of incubation. Co-culture of JQ-L and A-3 completely degraded 100 mg/L of cypermethrin within 24 h of incubation. Furthermore, a complete catabolic pathway of cypermethrin and the metabolite 3-PBA by the co-culture was proposed. This study provided a promising strategy for efficient elimination of cypermethrin residue-contaminated environments and agricultural products.

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Enhanced degradation of dicamba by an anaerobic sludge acclimated from river sediment

Cited by 31 publications

References 28 publications

Enhanced Methane Production from Sludge Anaerobic Digestion with the Addition of Potassium Permanganate

Enhanced Methane Production from Sludge Anaerobic Digestion with the Addition of Potassium Permanganate

Sulfate-Dependent Anaerobic Degradation of Herbicide Acetochlor by a Sulfate-Reducing Bacterium Cupidesulfovibrio sp. SRB-5

Highly efficient degradation of cypermethrin by a co-culture of Rhodococcus sp. JQ-L and Comamonas sp. A-3

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