Gaining deeper insights into the bioflocculation process occurring in a high loaded membrane bioreactor used for the treatment of synthetic greywater

Emaminejad, Seyed Aryan; Avval, Shirin Saffar; Bonakdarpour, Babak

doi:10.1016/j.chemosphere.2019.04.178

Cited by 23 publications

(8 citation statements)

References 45 publications

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“…However, in the only previous study of this kind in an HRAS process, in a HL-MBR TB-EPS showed a positive effect on bioflocculation whereas LB-EPS had no effect. 30…”

Section: Resultsmentioning

confidence: 99%

“…However, in the only previous study of this kind in an HRAS process, in a HL-MBR TB-EPS showed a positive effect on bioflocculation whereas LB-EPS had no effect. 30 The impact of change in the OLR on the protein and carbohydrate fractions of EPS in the HL-MSBR is shown in Fig. 3a.…”

Section: Effect Of the Olr On Eps Production And Psd And Their Role I...mentioning

confidence: 99%

“…Analysis of the PSD in HRAS processes is important because the size of the sludge particles, through its effect on bioflocculation efficiency, is expected to affect COD recovery efficiency in such processes. 30,56 The particle size distribution (PSD) for the activated sludge flocs in the HL-MSBR at different OLRs is presented in Fig. 3b.…”

Section: Effect Of the Olr On Eps Production And Psd And Their Role I...mentioning

confidence: 99%

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The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

Shafaei¹,

Bonakdarpour²,

Faridizad³

2022

Environ. Sci.: Water Res. Technol.

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“…However, in the only previous study of this kind in an HRAS process, in a HL-MBR TB-EPS showed a positive effect on bioflocculation whereas LB-EPS had no effect. 30…”

Section: Resultsmentioning

confidence: 99%

Section: Effect Of the Olr On Eps Production And Psd And Their Role I...mentioning

confidence: 99%

Section: Effect Of the Olr On Eps Production And Psd And Their Role I...mentioning

confidence: 99%

See 1 more Smart Citation

The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

Shafaei¹,

Bonakdarpour²,

Faridizad³

2022

Environ. Sci.: Water Res. Technol.

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“…The microbes generally produce TB-EPS first and then transform it into LB-EPS piece by piece [20]. LB-EPS has been reported to be more conducive to the formation of aggregates to a certain extent [21].…”

Section: Composition and Function Analysis Of Epsmentioning

confidence: 99%

An Efficient Bioaggregate Reactor for Enhanced Denitrification of Sewage with Low Carbon/Nitrogen Ratio

Chen

Ali

et al. 2021

Chem Eng & Technol

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This study developed a bioaggregate reactor by using Pseudomonas strain GF2. The response surface method indicated that the optimal parameters were pH 7, a hydraulic retention time (HRT) of 6 h, and an initial nitrate concentration of 25 mg L−1. Nitrate removal reached a maximum of 99.19 % at a C/N ratio of 2. Gas chromatographic detection revealed that nitrogen gas was the main product (98.46 %). 3D fluorescence spectroscopy showed that, with increasing HRT, the amounts of fulvic acid‐like, tryptophan, and protein‐like substances increased, which were consistent with the change in microbial community. Fourier transform infrared spectroscopy confirmed the existence of OH, CH, C=O, and C=C. High‐throughput sequencing showed that Pseudomonas and Azospira were the dominant genera.

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“…A fast growing population, especially in cities, and the constant growth in industrialization have increased the demand for potable water [1]. However, water pollution has become a challenging issue that worsen the unavailability of clean water [2].…”

Section: Introductionmentioning

confidence: 99%

Isolation of a Marine Bacterium and Application of Its Bioflocculant in Wastewater Treatment

Maliehe

Moganedi

Masoko

et al. 2022

Microbiology Research

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Bioflocculation has become the method of choice in wastewater treatment because of its effectiveness, environmental friendliness and innocuousness to humans. In this study, the bioflocculant-producing bacterium was isolated and its bioflocculant was used in wastewater treatment. The isolate was identified by 16S rRNA gene sequencing analysis. Its culture conditions (inoculum size, carbon and nitrogen sources, pH, temperature and time) were optimised using the one-factor-at-a-time assay. The cytotoxicity of the bioflocculant was assessed on human colorectal adenocarcinoma cells (Caco2) by tetrazolium-based colorimetric method. The ability of the bioflocculant to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) in wastewater was evaluated using Jar test. The bacterium was identified as Bacillus subtilis CSM5 and the maximum flocculating activity of 92% was observed when fructose and urea were used as nutrients and the culture conditions were adjusted to 30 °C, pH 9, 160 rpm and 72 h of incubation. Caco2 exhibited 90% viability when the highest bioflocculant concentration of 200 µg/µL was used. The reduction of BOD and COD was achieved at 59 ± 3.1 and 75 ± 0.4%, respectively. In conclusion, B. subtilis CSM5 is a good candidate for bioflocculant production and its bioflocculant has good potential for use in wastewater treatment.

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Gaining deeper insights into the bioflocculation process occurring in a high loaded membrane bioreactor used for the treatment of synthetic greywater

Cited by 23 publications

References 45 publications

The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

An Efficient Bioaggregate Reactor for Enhanced Denitrification of Sewage with Low Carbon/Nitrogen Ratio

Isolation of a Marine Bacterium and Application of Its Bioflocculant in Wastewater Treatment

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