Determination and evaluation of kinetic parameters of activated sludge biomass from a sludge reduction system treating real sewage by respirometry testing

Karlikanovaite-Balikci, Agne; Yağcı, Nevin

doi:10.1016/j.jenvman.2019.03.131

Cited by 19 publications

(12 citation statements)

References 33 publications

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“…The slope of the linear regression was used as a way of expressing Y obs. The relative sludge reduction was calculated using observed yield ratios obtained from identical systems operated in a conventional activated sludge manner with daily wastage of sludge (Karlikanovaite-Balikci and Yagci, 2019).…”

Section: Methodsmentioning

confidence: 99%

Microbial community shifts in the oxic-settling-anoxic process in response to changes to sludge interchange ratio

Karlikanovaite-Balikci

Özbayram

Yağcı

et al. 2019

Heliyon

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This particular study set out to demonstrate alterations on the microbial community of the oxic-settling-anaerobic/anoxic (OSA) process treating real domestic wastewater by changing interchange ratios (IRs). The sludge yield of systems operated at different IRs (1/13, 1/17 and 1/20) to assess sludge reduction was used to analyze microbial community composition variations. The highest IR (1/13) resulted in the highest sludge reduction (52.1%), while the OSA systems with IR of 1/17 and 1/20 reduced sludge production by 37.4% and 35.5%, respectively, in comparison to conventional systems. 16S rRNA gene amplicon sequencing analysis showed that the bacterial communities were composed of similar phylogenetic groups, Proteobacteria, Acidobacteria, and Bacteroidetes being dominant. The relative abundances differed due to the applied IRs. The highest abundance of Actinobacteria was determined at the highest IR (1/13) and increasing of the HRT to 1/20 caused a significant reduction in Actinobacteria species and the lowest abundance (6%) was determined in the OSA systems. The abundant of Thiothrix species that are boosted in the OSA trials may have a vital role in OSA systems, where its abundance was below the detection limits in the seed sludge sample. Therefore, they could be used as bioindicators in the OSA system.

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Section: Methodsmentioning

confidence: 99%

Microbial community shifts in the oxic-settling-anoxic process in response to changes to sludge interchange ratio

Karlikanovaite-Balikci

Özbayram

Yağcı

et al. 2019

Heliyon

Self Cite

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“…There have been various configurations of OSA applications including the attachment of interchange bioreactor to the main conventional activated sludge (CAS) [21], [33], membrane (MBR) [14] or sequencing batch reactors (SBR) [19], [34] reactors presented in the literature. SBR-OSA configuration has advantages over the CAS-OSA or MBR-OSA applications due to the lower space requirement in the waterline due to the absence of the secondary settling and the intermittent sludge cycling.…”

Section: Concept Of Osa Processmentioning

confidence: 99%

“…The observed yield varied between 0.112 and 0.465 gTSS/gCOD, showing that the excess sludge reduction due to the insertion of the sludge holding tank was 49.6 ± 20.7% compared to the conventional CAS system. Apart from this, a recent study by Karlikanovaite-Balikci and Yagci [19] evaluated simultaneous sludge reduction and in an oxic-settlinganoxic (OSA) system fed with real domestic wastewater at different sludge ages. The greatest corresponding sludge reduction was achieved as 58% operated at an interchange ratio of 7.7% (1/13) in the OSA system.…”

Section: The Potential Of the Osa Process In Terms Of Observed Sludge Yieldmentioning

confidence: 99%

“…Karlikanovaite-Balikci and Yagci [48] used a modified version of the ASM1 model to compare and stoichiometric and kinetic coefficients with control systems to investigate the key mechanism contributing to sludge reduction in OSA systems. After a series of respirometric tests and model calibration results, it was found that the decay rate was the most vital kinetic parameter showing a significant increase after introducing the side-stream reactor into a conventional activated sludge system.…”

Section: Enhanced Biomass Endogenous Decaymentioning

confidence: 99%

“…Many researchers use the observed yield (Fig. 2), and it has been recognized as an effective marker for sludge reduction [14]- [19].…”

Section: The Potential Of the Osa Process In Terms Of Observed Sludge Yieldmentioning

confidence: 99%

See 2 more Smart Citations

A review on promising strategy to decrease sludge production: Oxic-settling-anoxic/anaerobic process

Karlikanovaite-Balikci

Yağcı

2020

Environmental Research and Technology

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Recently, as environmental regulation for the removal of nutrients and excess sludge produced through wastewater treatment has become more restricted, many wastewater treatment plants face serious challenges in terms of waste production. Nowadays, the issue of excess sludge production has received considerable critical attention. Recent developments in sludge treatment technologies have heightened the need for more promising strategies to reduce sludge levels in a cost-effective and environmentally friendly manner. The purpose of this paper is to review recent research into the oxic-settling-anaerobic/anoxic (OSA) technology for sludge minimization. The OSA process is a modification of a conventional activated sludge system with the addition of interchange bioreactor parallel to recycled activated sludge line. The OSA process seems to be a revolutionary and cost-effective alternative for sludge reduction approach in the future. It is hoped that this research will contribute to a deeper understanding of the OSA process in terms of sludge reduction efficiency, carbon and nutrient removal, operational parameters, possible reduction mechanisms and microbial community changes after the implementation of the OSA system and applied in the treatment of real wastewater at full-scale.

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Knowledge and data-driven hybrid system for modeling fuzzy wastewater treatment process

Cheng

Guo

Shen

et al. 2021

Neural Comput & Applic

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Determination and evaluation of kinetic parameters of activated sludge biomass from a sludge reduction system treating real sewage by respirometry testing

Cited by 19 publications

References 33 publications

Microbial community shifts in the oxic-settling-anoxic process in response to changes to sludge interchange ratio

Microbial community shifts in the oxic-settling-anoxic process in response to changes to sludge interchange ratio

A review on promising strategy to decrease sludge production: Oxic-settling-anoxic/anaerobic process

Knowledge and data-driven hybrid system for modeling fuzzy wastewater treatment process

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