Study on the Effect of Variation of Flow in Sequencing Batch Reactor Using PCA and ANOVA

Vijayan, Govindasamy; Saravanane, R.; Sundararajan, T.

doi:10.4236/gep.2017.54006

Cited by 2 publications

(4 citation statements)

References 13 publications

(9 reference statements)

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“…It shows that the proportion of nutrients in wastewater plays an important role in increasing COD treatment efficiency [21]. The values of COD removal efficiency in our studies were consistent with prior results (COD removal efficiency from synthetic dairy wastewater using SBR was 94.74%) [14].…”

Section: Fig 7 Cod Treatment Efficiency With Different Olrssupporting

confidence: 92%

“…The study was carried out for about 60 days at a low OLR of only 0.6 kg/m 3 d. Under this low OLR, the COD removal efficiency reached only about 84%. However, when OLR was increased to about 1.9 kg/m 3 d, the treatment efficiency of COD was reduced to only about 62% [21]. The obtained results show that the OLRs have a significant effect on COD removal in the SBR system to treat dairy wastewater.…”

Section: Fig 7 Cod Treatment Efficiency With Different Olrsmentioning

confidence: 81%

“…Nitrogen treatment efficiencies in the two OLRs reached 55.6% and 47.8%, respectively. The nitrogen concentration in the effluent when the system operated at the OLR of 0.9 kg/m 3 d was lower than that at the OLR of 1.8 kg/m 3 d. However, the nitrogen treatment efficiency was reduced at the second loading rate [21].…”

Section: Effect Of Olrs On Nitrogen Treatment Efficiencymentioning

confidence: 85%

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Effect of Organic Loading Rates on Performance of Treating Dairy Wastewater in a Lab-Scale Sequencing Batch Reactor

Bui

Tran

et al. 2023

Int. j. eng. technol. innov.

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This study aims to investigate, the effect of organic loading rates (OLRs), nutrient ratio addition, and sludge retention time (SRT) on treating dairy wastewater in a sequencing batch reactor (SBR) system. This investigation is verified by experiments conducted in 3 phases at 3 different OLRs (1.8, 1.2, and 0.9 kg/m3d, respectively). Urea ((NH2)2CO) is added to make a suitable (COD:N:P) ratio of (100:5:1) in dairy wastewater. The SRT is adjusted from 50 days to an appropriate value of 18 days. The obtained results show that the COD, TN, and TP removal efficiencies are increased with decreasing OLRs. Sludge concentration in the SBR tank is stable at 1100 mg/L after adding (NH2)2CO. In addition, the SBR operated at a suitable SRT (i.e. 18 days) helps the biomass stably, resulting in enhancement of COD, TN, and TP removal. The results are helpful to the design of SBR for treating dairy wastewater.

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Section: Fig 7 Cod Treatment Efficiency With Different Olrssupporting

confidence: 92%

Section: Fig 7 Cod Treatment Efficiency With Different Olrsmentioning

confidence: 81%

Section: Effect Of Olrs On Nitrogen Treatment Efficiencymentioning

confidence: 85%

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Effect of Organic Loading Rates on Performance of Treating Dairy Wastewater in a Lab-Scale Sequencing Batch Reactor

Bui

Tran

et al. 2023

Int. j. eng. technol. innov.

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“…All of these measures are important in producing a high-quality effluent for advanced water treatment (Tchobanoglous et al, 2014;WEF/ASCE, 2010). The benefits of constant versus variable flow treatment are also well documented in the literature (Greenwood et al, 2002;Gujer & Erni, 1978;LaGrega & Keenan, 1974;Niku et al, 1981;Plósz et al, 2009;US EPA, 1974;Vijayan et al, 2017).…”

Section: Improved Process Performance and Stabilitymentioning

confidence: 83%

Rationale for constant flow to optimize wastewater treatment and advanced water treatment performance for potable reuse applications

Tchobanoglous

Kenny²,

Leverenz

2021

Water Environment Research

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Population growth, the impacts of climate change, and the need for greater water security have made the reuse of wastewater, including potable use, increasingly desirable. As interest in potable reuse of wastewater increases, a variety of processes have been proposed for advanced water treatment following conventional wastewater treatment. In all cases, the operation and performance of advanced water treatment facilities (AWTFs) is improved when the treated wastewater feed is of the highest quality that can be achieved and the advanced water treatment (AWT) processes are operated at a constant flow. One proven method of optimizing the performance of wastewater treatment facilities (WWTFs) is constant flow operation with no extraneous return flows other than internal process recycle flows, such as return settled solids. A number of approaches can be used to achieve constant flow including flow equalization, divided treatment trains, and satellite treatment. The ways in which constant flow wastewater treatment benefits both WWTFs as well as the AWTFs are considered with special emphasis on the ability to achieve predictable log removal credits (LRCs) for specific microorganisms. Actual performance data from constant flow WWTFs are used to illustrate how LRCs are determined. Practitioner points Constant flow WWTFs should be considered to produce the highest quality secondary effluent for AWT. Flow equalization, divided treatment trains, and satellite treatment can be used to achieve constant flow to optimize wastewater treatment in small and medium size WWTFs. Flow equalization can be used to maximize the amount of wastewater that can be recovered for potable reuse. Important benefits of constant flow for wastewater treatment facilities include economic and operational savings, stable and predictable treatment performance, energy savings, ability to optimize performance for the removal of specific constituents, and the ability to assign pathogen log removal credits (LRCs). Important benefits of constant flow and optimized WWT for AWTFs include economic and operational savings; less pretreatment needed, including energy and chemical usage; elimination of the need to cycle treatment processes; and added factor of safety with respect to the required pathogen LRCs. In large WWTFs, constant flow for AWTFs will typically be achieved by effluent diversion; depending on the effluent quality additional pretreatment may be needed. The design and implementation of WWTFs and AWTFs for potable reuse should be integrated for optimal performance and protection of public health.

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Study on the Effect of Variation of Flow in Sequencing Batch Reactor Using PCA and ANOVA

Cited by 2 publications

References 13 publications

Effect of Organic Loading Rates on Performance of Treating Dairy Wastewater in a Lab-Scale Sequencing Batch Reactor

Effect of Organic Loading Rates on Performance of Treating Dairy Wastewater in a Lab-Scale Sequencing Batch Reactor

Rationale for constant flow to optimize wastewater treatment and advanced water treatment performance for potable reuse applications

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