Enhanced thermophilic denitrification performance and potential microbial mechanism in denitrifying granular sludge system

Shi, Shuohui; Lin, Ziyuan; Zhou, Jiong; Fan, Xing; Huang, Yunpeng; Zhou, Jian

doi:10.1016/j.biortech.2021.126190

Cited by 26 publications

(5 citation statements)

References 46 publications

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“…The complete denitrification ability of Wenzhouxiangella sp. AB-CW3 isolated from a hypersaline soda lake has also been reported [ 86 ]. Based on these reports, Atopostipes , Bacillus , Halomonas , Pusillimonas , Truepera , and Wenahouziangella are presumed to have played an important role in the denitrification and/or N 2 O reduction during the bioremediation of diesel-contaminated soil in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Meanwhile, Pusillimonas was isolated from nitrate and radionuclide-contaminated groundwater, and shown to possess denitrifying functional genes(Grouzdev et al, 2018). Truepera has been reported as one of the denitri ers in a sequencing batch bio lm reactor used for land ll leachate treatment(Yin et al 2018), and exhibited a high dominance of over 20% in a similar denitri cation sequencing batch reactor(Shi et al, 2022). The complete denitri cation ability of Wenzhouxiangella sp.…”

mentioning

confidence: 99%

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Dynamics of Functional Genes and Bacterial Community during Bioremediation of Diesel-Contaminated Soil Amended with Compost

Yang

Lee

Cho

2023

J. Microbiol. Biotechnol.

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Compost is widely used as an organic additive to improve the bioremediation of diesel-contaminated soil. In this study, the effects of compost amendment on the remediation performance, functional genes, and bacterial community are evaluated during the bioremediation of diesel-contaminated soils with various ratios of compost (0-20%, w/w). The study reveals that the diesel removal e ciency, soil enzyme (dehydrogenase and urease) activity, soil CH 4 oxidation potential, and soil N 2 O reduction potential have a positive correlation with the compost amendment (p < 0.05). The ratios of denitrifying genes (nosZI, cnorB and qnorB) to 16S rRNA genes each show a positive correlation with compost amendment, whereas the ratio of the CH 4oxidizing gene (pmoA) to the 16S rRNA genes shows a negative correlation. Interestingly, the genera Acidibacter, Blastochloris, Erythrobacter, Hyphomicrobium, Marinobacter, Parvibaculum, Pseudoxanthomonas, and Terrimonas are strongly associated with diesel degradation, and have a strong positive correlation with soil CH 4 oxidation potential. Meanwhile, the genera Atopostipes, Bacillus, Halomonas, Oblitimonas, Pusillimonas, Truepera, and Wenahouziangella are found to be strongly associated with soil N 2 O reduction potential. These results provide useful data for the development of technologies for improving diesel removal e ciency while minimizing greenhouse gas emissions in the bioremediation process of dieselcontaminated soil.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Dynamics of Functional Genes and Bacterial Community during Bioremediation of Diesel-Contaminated Soil Amended with Compost

Yang

Lee

Cho

2023

J. Microbiol. Biotechnol.

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“…Microbial conditioners have the advantages of cleanliness, small dosage, and good conditioning effect but also can purify water and adsorb heavy metals. However, the operating conditions are strict, the scope of application is narrow, and it is generally effective for a specific wastewater with high content of some contaminant. , …”

Section: The Methods Of Sludge Conditioning For Dehydrationmentioning

confidence: 99%

“…However, the operating conditions are strict, the scope of application is narrow, and it is generally effective for a specific wastewater with high content of some contaminant. 166,167 4.3.1. Enzyme Treatment.…”

Section: Advanced Oxidation Process (Aop)mentioning

confidence: 99%

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Jiang

Gao

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Municipal sludge is an inevitable byproduct during the treatment of wastewater, which is produced by sewage treatment plants in urban residential areas, and it contains pathogens, heavy metals, and other pollutants. Municipal sludge is suitable for application in energy utilization because of its high organic content and relatively low toxic matter. The high moisture content of municipal sludge brings huge difficulties to its harmless disposal and resource utilization. At present, the main method used for sludge dehydration is mechanical dewatering. However, the mud cake produced by this method still has a water content of up to 80%, which does not meet the current rigorous requirements. Therefore, the development of deep dehydration technology for sludge is imperative. In this paper, the basic properties and structure of sludge were summarized. As a key component of sludge flocs, extracellular polymeric substance (EPS) has received much attention in sludge dewatering conditioning. Meanwhile, the influencing factors of sludge dewatering were also fully elaborated, including sludge types, sewage hardness, surface charge, size distribution, and sludge viscosity. And the main methods of sludge dewatering treatment were comprehensively included, namely, the physical method, chemical method, biological method, and combined conditioning methods. The advantages and disadvantages of each method are mentioned, and their application situations were analyzed. Furthermore, comment was provided on the conditioning mechanism, adaptability, prospects, and limitations of the techniques for improving sludge dewatering. This systematic review related to sludge dewatering can not only provide reference information for the conditioning method but also benefit the exploitation of efficient and ecofriendly sludge dewatering technology.

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“…The sludge samples were collected from the hydrolytic/acidogenic tank as well as the A/O process, and each sample was a mixture of six samples collected from the completely mixed reactors. The DNA was extracted with the Soil DNA Kit (GenElute, Sigma, Burlington, MA, USA) following the manufacturer's instruction, and cryopreserved at −80 • C until being sent to the Illumina MiSeq platform (Shanghai Majorbio Bio-pharm Technology Co., Ltd., Shanghai, China) for further molecular biological analysis., The detailed methods for subsequent purification, sequencing, and other analyses have been described in previous research [23]. Specifically, the amplification of the bacterial V3-V4 region in the 16S rRNA gene was performed with the universal primers 338F (ACTCCTACGG GAGGCAGCAG) and 806R (GGACTACHVGGGTWTCTAAT), and the raw 16S rRNA reads were demultiplexed, quality-filtered by fastp (v0.20.0), and merged by FLASH (v1.2.7).…”

Section: Microbial Community Analysismentioning

confidence: 99%

Composition Characterization and Transformation Mechanism of Dissolved Organic Matters in a Full-Scale Membrane Bioreactor Treating Co-Digestion Wastewater of Food Waste and Sewage Sludge

et al. 2022

Self Cite

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The membrane bioreactor (MBR) serves as the most widely used technology in anaerobic digestion wastewater treatment, but the composition and transformation of the dissolved organic matters (DOMs) are vague. This study focused on the composition characterization and transformation mechanism of DOMs in real co-digestion wastewater of food waste and sewage sludge from a full-scale MBR via molecular weight cut-off, 3D-EEM, FT-IR, and SPME-GC/MS. The results indicated that the co-digestion wastewater mainly comprised organics with molecular weight (MW) lower than 1 kDa and dominated by tryptophane-protein-like substances. The hydrolytic/acidogenic process improved the biodegradability with the conversion of high-MW organics into low-MW organics, while the two-stage A/O process possessed the highest contribution to the organic removal with the consumption of most DOMs. However, the deficient removal of refractory organics (MW < 5 kDa) in the ultrafiltration unit led to the residual DOMs in the effluent. The potential functional bacteria in the biological processes have also been identified and were principally affiliated with Proteobacteria and Firmicutes. These findings could help to advance the understanding of the co-digestion wastewater and provide fundamental information for the optimization and development of MBR in anaerobic digestion wastewater treatment.

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Enhanced thermophilic denitrification performance and potential microbial mechanism in denitrifying granular sludge system

Cited by 26 publications

References 46 publications

Dynamics of Functional Genes and Bacterial Community during Bioremediation of Diesel-Contaminated Soil Amended with Compost

Dynamics of Functional Genes and Bacterial Community during Bioremediation of Diesel-Contaminated Soil Amended with Compost

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Composition Characterization and Transformation Mechanism of Dissolved Organic Matters in a Full-Scale Membrane Bioreactor Treating Co-Digestion Wastewater of Food Waste and Sewage Sludge

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