Treatment of petroleum wastewater using an up‐flow anaerobic sludge blanket (UASB) reactor and turf soil as a support material

Wang, Qinghong; Liang, Jiahao; Zhan, Yali; Yao, Xianyang; Liu, Zhiyuan; Li, Qing X; Guo, Shaohui; Chen, Chunmao; Yoza, Brandon A.

doi:10.1002/jctb.5694

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…The abundance of Ca. Aminobacteroidaceae populations was further reported to reach over 15% of the microbial community in up-flow anaerobic sludge bed reactors (Chen et al, 2017;Wang et al, 2018), suggesting their important roles in anaerobic environments. Furthermore, we mapped metagenomic and metatranscriptomic sequences obtained from full-scale ADs and sediments to the Ca.…”

Section: Ecological Prevalence Of Uncultured Bacteroidalesmentioning

confidence: 99%

Metagenomic and Metatranscriptomic Analyses Revealed Uncultured Bacteroidales Populations as the Dominant Proteolytic Amino Acid Degraders in Anaerobic Digesters

et al. 2020

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Current understanding of amino acid (AA) degraders in anaerobic digesters is mainly based on cultured species, whereas microorganisms that play important roles in a complex microbial community remain poorly characterized. This study investigated short-term enrichments degrading single AAs using metagenomics and metatranscriptomics. Metagenomic analysis revealed that populations related to cultured AA degraders had an abundance <2.5% of the sequences. In contrast, metagenomic-assembled bins related to uncultured Bacteroidales collectively accounted for >35% of the sequences. Phylogenetic analyses suggested that these Bacteroidales populations represented a yet-to-be characterized family lineage, i.e., Bacteroidetes vadinHA17. The bins possessed the genetic capacity related to protein degradation, including surface adhesion (3-7 genes), secreted peptidase (52-77 genes), and polypeptide-specific transporters (2-5 genes). Furthermore, metatranscriptomics revealed that these Bacteroidales populations expressed the complete metabolic pathways for degrading 16 to 17 types of AAs in enrichments fed with respective substrates. These characteristics were distinct from cultured AA degraders including Acidaminobacter and Peptoclostridium, suggesting the uncultured Bacteroidales were the major protein-hydrolyzing and AA-degrading populations. These uncultured Bacteroidales were further found to be dominant and active in full-scale anaerobic digesters, indicating their important ecological roles in the native habitats. "Candidatus Aminobacteroidaceae" was proposed to represent the previously uncharted family Bacteroidetes vadinHA17.

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Section: Ecological Prevalence Of Uncultured Bacteroidalesmentioning

confidence: 99%

Metagenomic and Metatranscriptomic Analyses Revealed Uncultured Bacteroidales Populations as the Dominant Proteolytic Amino Acid Degraders in Anaerobic Digesters

et al. 2020

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“…The dried sample of P. Australis biochar (PABC) was ground and sieved to 200 mesh particle size by standard sieves (Model Φ200) before storage and further testing. The PABC was then stored in a desiccator for later experimental use [14,15].…”

Section: Wastewater Characteristicsmentioning

confidence: 99%

Improving the stability and biogas production of UASB reactor; parametric and microbial study

Mohamed

El-Shahawy

EL-Shatoury

et al. 2023

Suez Canal Engineering, Energy and Environmental Science

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In areas without sewer collection infrastructure, decentralized treatment is regarded as being necessary to provide sewage management and sanitation. Organic matter can be degraded anaerobically with Up-flow Anaerobic Sludge Blanket (UASB) digesters resulting in biogas production that is used in a wide range of uses (i.e., for heating, electricity, and fuel). Under decentralized operations, traditional aerated wastewater treatment can be expensive and readily overloaded by high-strength effluent or changes in the environment's temperature. High-strength wastewater can be treated with UASB digesters, which can also produce biofuel and reduce the high costs of aeration. Operations can be stabilized and granule formation improved by adding supporting components such as microbial communities and biochar made from Phragmites Australis to the UASB. The first stage of this study statistically investigates the optimization of anaerobic treatment conditions of cattle wastewater in a batch study. In the second stage, continuous treatment processes will be planned using data obtained as a result of the batch study. The COD concentrations used in the present study ranged between 1850 mg/L to 2050 mg/L while the BOD concentrations range between 450 mg/L to 1250 mg/L. The effects of operating parameters on the chemical oxygen demand (COD) removal efficiency and the methane production rate were evaluated. COD removal efficiencies of 72.43% -92.70% were obtained for the cattle wastewater using a 3-14 d hydraulic retention time. The maximum COD removal was found in batch experiment 7, where the type of bacteria was actinobacteria, biochar dose was 20 g/L, pH was 7.5 and no inoculum dose was added this resulted in 92.70% COD removal efficiency. Hence, the batch study recommended using actinobacteria as a type of bacteria and Phragmites Australis biochar for continuous UASB reactors.

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“…Approximately 3.5 to 5 m 3 of wastewater is generated from one tonne of crude oil processed 5 , 6 . Biological processes such as membrane bioreactor (MBR) 7 , 8 , upflow anaerobic sludge blanket 9 , 10 and biological aerated filter reactor 2 , 11 has been used to treat oily wastewaters. However, these processes require long operational periods and energy input.…”

Section: Introductionmentioning

confidence: 99%

Enhanced bioelectrochemical treatment of petroleum refinery wastewater with Labaneh whey as co-substrate

Mohanakrishna

Abu-Reesh

Pant

2020

Sci Rep

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Petroleum refinery wastewater (PRW) that contains recalcitrant components as the major portion of constituents is difficult to treat by conventional biological processes. Microbial fuel cells (MFCs) which also produce renewable energy were found to be promising for the treatment of PRW. However, due to the high total dissolved solids and low organic matter content, the efficiency of the process is limited. Labaneh whey (LW) wastewater, having higher biodegradability and high organic matter was evaluated as co-substrate along with PRW in standard dual chambered MFC to achieve improved power generation and treatment efficiency. Among several concentrations of LW as co-substrate in the range of 5–30% (v/v) with PRW, 85:15 (PRW:LW) showed to have the highest power generation (power density (PD), 832 mW/m2), which is two times higher than the control with PRW as sole substrate (PD, 420 mW/m2). On the contrary, a maximum substrate degradation rate of 0.420 kg COD/m3-day (ξCOD, 63.10%), was registered with 80:20 feed. Higher LW ratios in PRW lead to the production of VFA which in turn gradually decreased the anolyte pH to below 4.5 (70:30 feed). This resulted in a drop in the performance of MFC with respect to power generation (274 mW/m2, 70:30 feed) and substrate degradation (ξCOD, 17.84%).

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Treatment of petroleum wastewater using an up‐flow anaerobic sludge blanket (UASB) reactor and turf soil as a support material

Cited by 8 publications

References 32 publications

Metagenomic and Metatranscriptomic Analyses Revealed Uncultured Bacteroidales Populations as the Dominant Proteolytic Amino Acid Degraders in Anaerobic Digesters

Metagenomic and Metatranscriptomic Analyses Revealed Uncultured Bacteroidales Populations as the Dominant Proteolytic Amino Acid Degraders in Anaerobic Digesters

Improving the stability and biogas production of UASB reactor; parametric and microbial study

Enhanced bioelectrochemical treatment of petroleum refinery wastewater with Labaneh whey as co-substrate

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