Effect of mixed liquor volatile suspended solids (MLVSS) and hydraulic retention time (HRT) on the performance of activated sludge process during the biotreatment of real textile wastewater

Kumar, Kapil; Singh, Gurvinder; Dastidar, M.G.; Sreekrishnan, T.R.

doi:10.1016/j.wri.2014.01.001

Cited by 39 publications

(21 citation statements)

References 21 publications

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“…It showed that MLVSS for the six samples were in the range of 67.97±42.43 -137.19±14.14 mg/L. The high value of MLVSS elucidated the large number of microorganisms and certain organic matter in the wastewater that certainly could exist in water environment with high dissolved oxygen concentration [16].…”

Section: Physicochemical Parameters Evaluation Of Pbt Unitmentioning

confidence: 93%

The diversity of active microbial groups in an activated sludge process treating painting process wastewater

2020

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Activated sludge process is one of the wastewater treatment method that is applied for many wastewater types including painting process wastewater of automotive industry. This wastewater is well-known to have high heavy metals concentration which could deteriorate water environment if appropriate performance of the wastewater treatment could not be achieved. In this study, we monitored microbial community diversity in a Painting Biological Treatment (PBT) system. We applied a combination of cultivation and genotypic biological methods based on 16S rRNA gene sequence analysis to identify the diversity of active microbial community. The results showed that active microbes that could grow in this activated sludge system were dominated by Gram-negative bacteria. Based on 16S rRNA gene sequencing analysis, it was revealed that their microbial diversity has close association with Bacterium strain E286, Isosphaera pallida, Lycinibacillus fusiformis, Microbacterium sp., Orchobactrum sp., Pseudomonas guariconensis, Pseudomonas sp. strain MR84, Pseudomonas sp. MC 54, Serpens sp., Stenotrophomonas acidaminiphila, and Xylella fastidiosa with similarity of 86 – 99%. This findings reflects that microbial community in a Painting Biological Treatment (PBT) system using activated sludge process could adapt with xenobiotics in the wastewater and has a wide range of diversity indicating a complex metabolism mechanism in the treatment process.

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Section: Physicochemical Parameters Evaluation Of Pbt Unitmentioning

confidence: 93%

The diversity of active microbial groups in an activated sludge process treating painting process wastewater

2020

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“…It was strengthened by Kumar and his partner researchs. They stated that the reason for this case is due to lower number of microorganisms present in the aeration tank represented by smaller value of MLVSS (Kumar, Singh, Dastidar, & Sreekrishnan, 2014).…”

Section: Cod Effluent Profile During Activated Sludge Treatment Processmentioning

confidence: 98%

The Influence of Calcium Hypochlorite Dosage Adjustment on Tapioca Wastewater Pre-Chlorination Toward Efficiency of Activated Sludge Treatment

Mulyani

Pamungkas²

2016

Molekul

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The objectives of this research are to study about influence of calcium hypochlorite dosage adjustment on tapioca wastewater chlorination toward efficiency of activated sludge treatment especially at MLVSS profile and percentage of COD removal. This research mainly divided into pre-chlorination and activated sludge treatment. Pre-chlorination taken place for 60 minutes at pH 8. The variation of calcium hypochlorite dosages which used are 58, 59, and 60 mg/L. Pre-chlorination effluent with no free chlorine residual then becomes activated sludge treatment influent. Sampling has done each aeration time interval 0, 2, 4, and 6 hour for analysis of COD and MLVSS content. Research result generally shows that addition of aeration time for each variation of calcium hypochlorite dosage will increase MLVSS and decrease COD content. Smallest value of COD effluent could achieved in the activated sludge treatment with calcium hipochlorite dosage 60 mg/L addition at influent during 4 hours aeration time. Addition of 58 mg/l calcium hypochlorite results highest MLVSS and percentage of COD removal.

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“…For Fenton reaction, H 2 O 2 (4.0 mM) was injected twice (30% at 12 min and 70% at 16 min), while FeSO 4 ·7H 2 O (4.2 mM) was added once to the influent and mixed rapidly for 30 min. Hydrogen peroxide disappeared within a few minutes, while ferrous ion was oxidized gradually over 20 min, indicating that there was an additional source of electron acceptor (e.g., ambient oxygen) for ferrous ion oxidation [24]. The Fentonoxidation effluent was mixed slowly and coagulated for 15 min at pH 5.8-6.0 with the ferric ion produced from the Fenton reaction, followed by final clarification and discharge to a public sewer flowing into a regional municipal wastewater treatment plant.…”

Section: Dyeing Wastewater and Treatment Processesmentioning

confidence: 99%

“…Improvement in the biological treatment of dyes can be achieved in general with longer solid retention time (SRT) and higher MLSS concentration, as suggested by Kuman et al [24], who studies the effects of SRT and MLSS concentration on the biological treatment of real textile wastewater. For current study, there was no clarifier that could help to recycle the sludge and improve the efficiency.…”

Section: 7-dyhydroxy-8-(3-methyl-2-buthyl)-6-(3-methyl-1-oxbutyl)-4-mentioning

confidence: 99%

Characterization of refractory matters in dyeing wastewater during a full-scale Fenton process following pure-oxygen activated sludge treatment

Bae

Won

Hwang

et al. 2015

Journal of Hazardous Materials

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Effect of mixed liquor volatile suspended solids (MLVSS) and hydraulic retention time (HRT) on the performance of activated sludge process during the biotreatment of real textile wastewater

Cited by 39 publications

References 21 publications

The diversity of active microbial groups in an activated sludge process treating painting process wastewater

The diversity of active microbial groups in an activated sludge process treating painting process wastewater

The Influence of Calcium Hypochlorite Dosage Adjustment on Tapioca Wastewater Pre-Chlorination Toward Efficiency of Activated Sludge Treatment

Characterization of refractory matters in dyeing wastewater during a full-scale Fenton process following pure-oxygen activated sludge treatment

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