Investigation of the sludge reduction mechanism in the anaerobic side-stream reactor process using several control biological wastewater treatment processes

Chon, Dong-Hyun; Rome, McNamara; Kim, Young Beom; Park, Ki Young; Park, Chul

doi:10.1016/j.watres.2011.08.051

Cited by 111 publications

(53 citation statements)

References 14 publications

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“…The synthesis of cells in the aerobic digester and OSA may occur even under limited substrate conditions when microorganisms consume products of cell lysis (Hao et al, 2010), so those reactors may also contribute to MLVSS production of the whole system. The MLVSS production of the control (P Control ) and OSA (P OSA ) systems were calculated using Equations S. 4 wherein MLVSS AE/ANX or ANX is the sludge concentration of the aerobic/anoxic and anoxic reactors, V AE, AE/ANX or ANX is the effective digester or reactor volume, Q out is the flow rate of sludge wasted from the aerobic digester, and q 3 is flow rate of sludge wasted from the aerobic/anoxic reactor. Notably, the sludge interchanged within the external reactors and between SBR OSA and external reactors were retained in the system hence it is not necessary to deduct those sludge flows from the calculation of P OSA .…”

Section: Resultsmentioning

confidence: 99%

“…Sludge yield was derived from the slope of the linear regression of the cumulative sludge produced versus the cumulative substrate consumed. Cumulative values were obtained by incrementing the variations in sludge production and substrate consumption in previous sampling intervals (Chon et al, 2011b), and is discussed in detail in Supplementary Table S2.…”

Section: Calculation Of Sludge Yieldmentioning

confidence: 99%

“…Laboratory-scale OSA operated using synthetic wastewater reportedly achieves over 40% sludge reduction (Chon et al, 2011b;Saby et al, 2003). However, these high sludge reduction values are rarely observed in pilot-or full-scale systems or when real sewage is used as the feed (Coma et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Effects of sludge retention time on oxic-settling-anoxic process performance: Biosolids reduction and dewatering properties

Semblante

Hai

Bustamante

et al. 2016

Bioresource Technology

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Nghiem, L. D. (2016). Effects of sludge retention time on oxic-settlinganoxic process performance: biosolids reduction and dewatering properties. Bioresource Technology, 218 1187-1194.Effects of sludge retention time on oxic-settling-anoxic process performance: biosolids reduction and dewatering properties AbstractIn this study, the effect of sludge retention time (SRT) on oxic-settling-anoxic (OSA) process was determined using a sequencing batch reactor (SBR) attached to external aerobic/anoxic reactors. The SRT of the external reactors was varied from 10 to 40 d. Increasing SRT from 10 to 20 d enhanced volatile solids destruction in the external anoxic reactor as evidenced by the release of nutrients, however, increasing the SRT to 40 d did not enhance volatile solids destruction further. Relatively short SRT (10-20 d) favoured the conversion of destroyed solids into inert products. The application of an intermediate SRT (20 d AbstractIn this study, the effect of sludge retention time (SRT) on oxic-settling-anoxic (OSA) process was determined using a sequencing batch reactor (

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Section: Resultsmentioning

confidence: 99%

Section: Calculation Of Sludge Yieldmentioning

confidence: 99%

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Effects of sludge retention time on oxic-settling-anoxic process performance: Biosolids reduction and dewatering properties

Semblante

Hai

Bustamante

et al. 2016

Bioresource Technology

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“…The observed sludge yield (Y obs ) was determined for each monitoring phase using a regression method applied to the masses of TSS produced and organic matter removed (Chon et al, 2011;Coma et al, 2013).…”

Section: Observed Sludge Yield (Yobs) Calculationmentioning

confidence: 99%

“…The sludge retention time (SRT) was calculated according to Chon et al (2011) as the ratio between the total mass of solids in the reactor and the mass of solids extracted daily from the system.…”

Section: Sludge Retention Time (Srt) Calculationmentioning

confidence: 99%

Reduction of Excess Sludge Production in an Activated Sludge System Based on Lysis-Cryptic Growth, Uncoupling Metabolism and Folic Acid Addition

Velho

Daudt

Martins

et al. 2016

Braz. J. Chem. Eng.

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-The following sludge reduction alternatives were tested in wastewater biological reactors: oxic-settling-anaerobic (OSA-process); ultrasonic disintegration (UD); chlorination (CH); 3,3',4',5-tetrachlorosalicylanilide (TCS); and folic acid (FA). Compared to the control system, UD reduced 55% of the sludge production, and greater substrate and nutrient removal efficiency was achieved. CH worsened the sludge settleability and increased the SVI values; the system achieved 25% of sludge reduction. OSA showed 50% and 60% of sludge reduction after 16 and 10 hours under anaerobic conditions, respectively. The observed sludge yield during TCS addition was decreased by 40%, and the sludge settleability worsened. FA presented the highest sludge reduction (75%), and the system improved the nutrient removal efficiency by 30% compared to the control system and maintained the sludge properties. Acute toxicity conducted with Daphnia magna classified the effluent from the sludge reduction systems as non-toxic for discharge into water sources.

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Incorporating the oxic‐settling‐anaerobic (OSA) process into an anoxic–oxic system for sewage sludge reduction and nutrient removal

Romero

Cruz²,

Alonso

et al. 2017

Env Prog and Sustain Energy

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The production of sludge in biological wastewater treatments is a growing problem worldwide as it entails economic, environmental, and health problems. The oxic‐settling‐anaerobic (OSA) process is one of the techniques that have been developed to reduce the sludge produced in the activated sludge process (ASP). This article reports the feasibility of the application of the OSA process in a nutrient removal system, specifically, in an anoxic–oxic (A) process. The results reveal TN removal in the A + OSA system of 68.84% and 69.91% (for 7 and 11 h of sludge anaerobic exposure time, SAET, respectively) versus 38.02% and 32.47% in the OSA system with similar SAET. The percentage sludge reductions obtained were, respectively, 22.41% and 31.93% in the OSA system and 23.53% and 32.49% in the A + OSA system compared to the sludge produced in the conventional ASP. The study confirms the suitability of the application of the OSA process in a nutrient removal system, as nutrient removal performances are not affected, while at the same time achieving higher sludge reduction. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1068–1074, 2018

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Investigation of the sludge reduction mechanism in the anaerobic side-stream reactor process using several control biological wastewater treatment processes

Cited by 111 publications

References 14 publications

Effects of sludge retention time on oxic-settling-anoxic process performance: Biosolids reduction and dewatering properties

Effects of sludge retention time on oxic-settling-anoxic process performance: Biosolids reduction and dewatering properties

Reduction of Excess Sludge Production in an Activated Sludge System Based on Lysis-Cryptic Growth, Uncoupling Metabolism and Folic Acid Addition

Incorporating the oxic‐settling‐anaerobic (OSA) process into an anoxic–oxic system for sewage sludge reduction and nutrient removal

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