The Formation and Stabilization of Aerobic Granular Sludge in a Sequencing Batch Airlift Reactor for Treating Tapioca-Processing Wastewater

Nguyen, Phuong Thi Thanh; Nguyen, Phuoc Van; Truong, Hong Thi Bich; Bùi, Hà Mạnh

doi:10.15244/pjoes/62736

Cited by 13 publications

(3 citation statements)

References 31 publications

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“…42 As an extension of the anaerobic duration during M2 reduced the aerobic duration period, it in turn reduced the exposure of the aerobic granules to the HSF caused by the aeration, subsequently causing the formation of aerobic granules with irregular shapes. Further, aerobic granules formed in M2 appeared to be darker compared to those formed in both M1 and M3, perhaps due to the presence of a large number of anaerobic bacteria in the granules, 43 which was encouraged by the long anaerobic feeding duration provided in M2.…”

Section: Resultsmentioning

confidence: 95%

Simultaneous nitrogen and phosphorus removal from domestic wastewater in an aerobic granulation system operated at different anaerobic–aerobic durations

Aris

Zain

et al. 2022

Environ. Sci.: Water Res. Technol.

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Section: Resultsmentioning

confidence: 95%

Simultaneous nitrogen and phosphorus removal from domestic wastewater in an aerobic granulation system operated at different anaerobic–aerobic durations

Aris

Zain

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…The obtained results showed the suitability of the SBAR design for the aerobic biological treatment of different types of mineral oil-based wastewaters and its valorization for the production of neutral lipids. SBAR systems are commonly used for the removal of nutrients and/or toxic compounds from several wastewaters, including saline wastewaters (Li et al, 2017;Nguyen et al, 2016). From the authors knowledge, this is the first time that the feasibility of a SBAR system for an efficient aerobic biological treatment of different types of mineral oil-wastewaters coupled with neutral lipids production is reported.…”

Section: Intracellular Lipids Extracellular Lipidsmentioning

confidence: 94%

Sequencing batch airlift reactors (SBAR): a suitable technology for treatment and valorization of mineral oil wastewaters towards lipids production

Silva

Fernandes

Fiume

et al. 2021

Journal of Hazardous Materials

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Produced water (PW) and spent oil-based wastewaters are some of the largest mineral oil wastewaters produced. Due to the high toxicity of hydrocarbons, several countries set stringent discharge limits and its treatment is compulsory before discharge. In this work, biological treatment of mineral oil wastewaters coupled with the production of bacterial lipids is demonstrated in sequential batch airlift reactors (SBAR). Two SBAR (2 L working volume) were used for treatment of PW and lubricant-based wastewater (LW), inoculated with Alcanivorax borkumensis SK2 (SBAR Ab+PW ) and Rhodococcus opacus B4 (SBAR R.o+LW ), respectively. A total petroleum hydrocarbon removal (TPH) efficiency up to 96% and 80% were achieved for SBAR Ab+PW and SBAR R.o+LW , respectively. Intracellular lipids production in SBAR Ab+PW increased when lower TPH/N ratios and higher feast stage duration were applied (up to 0.74 g g -1 cell dry weight (CDW)), whereas in SBAR R.o+LW higher lipids production was observed for higher TPH/N ratios (0.94 g g -1 in CDW). Triacylglycerols (TAG) were the main intracellular lipid accumulated in both SBAR Ab+PW and SBAR R.o+LW operations, while wax ester (WE) production was only observed extracellularly in the SBAR Ab+PW .

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“…Compared with other biological processing, the aerobic method can produce more significant reduction of organic compound levels in the waste in the shortest time. Activated sludge process with 170 minutes of aeration time can reduce the COD concentration in tapioca wastewater up to 96.3% (Nguyen and Nguyen, 2016). However, the high concentration of organic materials reported can create a difficulty in the application of aerobic method, either economically or technically (Jern, 2006).…”

Section: Introductionmentioning

confidence: 99%

Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

et al. 2019

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Industrial wastewater treatment using Sequencing Batch Reactor (SBR) can improve effluent quality at lower cost than that obtained by other biological treatment methods. Further optimization is still required to enhance effluent quality until it meets standard quality and to reduce the operating cost of treatment of high strength organic wastewater. The purpose of this research was to determine the effect of pretreatment (pH adjustment and prechlorination) and aeration time on effluent quality and COD removal rate in tapioca wastewater treatment using SBR. Pretreatment was done by (1) adjustment of tapioca wastewater pH to control (4.92), 7, and 8, and (2) tapioca wastewater prechlorination at pH 8 during hour using calcium hypochlorite in variation dosages 0, 2, 4, 6 mg/L Cl2, SBR operation was conducted according to following steps: (1) Filling of pre-treated wastewater into a bioreactor during 1 hour, and (2) aeration of the mixture of tapioca wastewater and activated sludge during 8 hours. Effluent sample was collected at every 2-hours aeration for COD analysis. COD removal rate mathematical formula was got by first deriving the best fit function between aeration time and COD. Optimum aeration time resulting in no COD removal rate. The value of COD effluent and its removal rate in optimum aeration time was used to determine the recommended of operation condition of pretreatment. Research result shows that chosen pH operation condition is pH 8. Prechorination can make effluent quality which meets standard quality and highest COD removal rate. The chosen Cl2 dosage is 6 mg/L.

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The Formation and Stabilization of Aerobic Granular Sludge in a Sequencing Batch Airlift Reactor for Treating Tapioca-Processing Wastewater

Cited by 13 publications

References 31 publications

Simultaneous nitrogen and phosphorus removal from domestic wastewater in an aerobic granulation system operated at different anaerobic–aerobic durations

Simultaneous nitrogen and phosphorus removal from domestic wastewater in an aerobic granulation system operated at different anaerobic–aerobic durations

Sequencing batch airlift reactors (SBAR): a suitable technology for treatment and valorization of mineral oil wastewaters towards lipids production

Study of COD Removal Rate on a Sequencing Batch Reactor (SBR) Treating Tapioca Wastewater

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