Aerobic granules formation and simultaneous nitrogen and phosphorus removal treating high strength ammonia wastewater in sequencing batch reactor

Wei, Dong; Shi, Li; Yan, Tao; Zhang, Ge; Wang, Yifan; Du, Bin

doi:10.1016/j.biortech.2014.08.001

Cited by 85 publications

(30 citation statements)

References 29 publications

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“…The dominance of TN over TP removal efficiency was also observed in this study, but the difference was not significant (83% vs. 75%). The TN and TP removal rate reached a high value indicating that the settleability of the sludge in the SBR system was relatively fast and effective, and led to a reduction in the suspended microorganism biomass, which mainly contributed to a high nitrogen and phosphorous concentration in effluent [34,35]. This was reflected by SVI 30 values, a parameter describing the ability of the sludge to settle and compact, that gained the optimal range from 100 mL/g to 200 mL/g after two weeks and was sustained around 90 mL/g for the rest of the operational periods.…”

Section: Discussionmentioning

confidence: 99%

Sequencing Batch Reactor and Bacterial Community in Aerobic Granular Sludge for Wastewater Treatment of Noodle-Manufacturing Sector

et al. 2018

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Abstract:The sequencing batch reactor (SBR) has been increasingly applied in the control of high organic wastewater. In this study, SBR with aerobic granular sludge was used for wastewater treatment in a noodle-manufacturing village in Vietnam. The results showed that after two months of operation, the chemical oxygen demand, total nitrogen and total phosphorous removal efficiency of aerobic granular SBR reached 92%, 83% and 75%, respectively. Bacterial diversity and bacterial community in wastewater treatment were examined using Illumina Miseq sequencing to amplify the V3-V4 regions of the 16S rRNA gene. A high diversity of bacteria was observed in the activated sludge, with more than 400 bacterial genera and 700 species. The predominant genus was Lactococcus (21.35%) mainly containing Lactococcus chungangensis species. Predicted functional analysis showed a high representation of genes involved in membrane transport (12.217%), amino acid metabolism (10.067%), and carbohydrate metabolism (9.597%). Genes responsible for starch and sucrose metabolism accounted for 0.57% of the total reads and the composition of starch hydrolytic enzymes including α-amylase, starch phosphorylase, glucoamylase, pullulanase, α-galactosidase, β-galactosidase, α-glucosidase, β-glucosidase, and 1,4-α-glucan branching enzyme. The presence of these enzymes in the SBR system may improve the removal of starch pollutants in wastewater.

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Section: Discussionmentioning

confidence: 99%

Sequencing Batch Reactor and Bacterial Community in Aerobic Granular Sludge for Wastewater Treatment of Noodle-Manufacturing Sector

et al. 2018

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“…The removal of TN was higher the higher the COD/TKN ratio, indicating that probably the denitrification rates were lower in the tests where organic matter was lacking for the heterotrophic denitrifying bacteria (Figure 2). Wei et al (2014) evaluated TN removal by SND with COD/N ratios varying from 3 to 10. They found that TN removal ranged from 48 to 88% for COD/N ratios of 3 to 9.…”

Section: Removal Of Nitrogen and Codmentioning

confidence: 99%

“…Thus, autotrophic and heterotrophic microorganisms, nitrifying bacteria and denitrifying bacteria, may exist in a single granule, positioned in different layers, due to the DO gradient in the flocs (Wei et al, 2014). The physical explanation for this phenomenon is that the SND occurs as a consequence of the oxygen concentration gradient in the biofilm due to the diffusion limitations of the gas in this solid medium (Lochmatter et al, 2013;Pradnya, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of Aeration and Recirculation in the Removal of Nitrogen and Chemical Oxygen Demand From Sanitary Sewage in a Structured Bed Reactor

et al. 2017

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This study aimed to evaluate a structured bed reactor with intermittent aeration in the simultaneous removal of Chemical Oxygen Demand (COD) and Total Nitrogen (TN) from sanitary sewage. The reactor was operated for 339 days with a Hydraulic Retention Time (HRT) of 12 hours, temperature of 30 ± 1ºC and continuous feeding. Nine trials were carried out in which three different effluent recirculation flow (Qr), 3, 2 and 1 time the incoming flow, were evaluated in three different aeration times, of 1h, 2h, and 3h, in 3 hour cycles. The results showed that different recirculation flows and aeration times did not influence the removal of COD, which reached 89%±12. It was observed that the efficiency of TN removal was higher in the tests with higher COD/TKN ratio, between 7.2 and 7. It was verified that it is possible to remove the COD and nitrogen from sanitary sewage in a structured bed reactor with intermittent aeration.

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“…Anaerobic and aerobic bioreactors [10,11] are commonly used to treat wastewater by converting the containing organic compositions into biogas including CO2 and fuel of H2 and CH4 [12,13]. To further remove the biological inefficient compositions in wastewater, bio-electrochemical treatment system is usually combined with the bio-reactors to enhance their treating ability and efficiency [14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Organic Polymerization in Treating Waste Water by Electrolysis

Nong¹,

Jiang²,

Wang³

2017

Proceedings of the 3rd International Conference on Wireless Communication and Sensor Networks (WCSN 2016)

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Abstract-Treating wastewater by bio-reactors combined with electrolytic cells gets better efficiencies in practices. Beside removal of pollutants by electro-oxidation reactions, organic polymerization is considered as another mechanism contributing to remove pollutants in treating wastewater by electrolysis. Therefore, an investigation of organic polymerization in wastewater by electrolysis is carried out in this paper. The common organic substrates of methanol, ethanol and glycol in water can be polymerized by electrolysis. Polymer precipitation contributes to removing 36.9 % and 86.38 % of COD of pulping wastewater and black liquor, respectively. The results indicate that organic polymerization plays an important role in pollutants reduction in treating wastewater by electrolysis.

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Aerobic granules formation and simultaneous nitrogen and phosphorus removal treating high strength ammonia wastewater in sequencing batch reactor

Cited by 85 publications

References 29 publications

Sequencing Batch Reactor and Bacterial Community in Aerobic Granular Sludge for Wastewater Treatment of Noodle-Manufacturing Sector

Sequencing Batch Reactor and Bacterial Community in Aerobic Granular Sludge for Wastewater Treatment of Noodle-Manufacturing Sector

Effect of Aeration and Recirculation in the Removal of Nitrogen and Chemical Oxygen Demand From Sanitary Sewage in a Structured Bed Reactor

Investigation of Organic Polymerization in Treating Waste Water by Electrolysis

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