Reduction of excess sludge production in sequencing batch reactor (SBR) by lysis–cryptic growth using homogenization disruption

Lan, Wangcheng; Li, Yiyong; Bi, Qi; Hu, Yongyou

doi:10.1016/j.biortech.2013.02.047

Cited by 30 publications

(8 citation statements)

References 14 publications

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“…On the other hand, average Y obs in the test SBR decreased to 0.20 g SS/g SCOD at 20% recycling, to 0.14 g SS/g SCOD at 50%, and then to 0.092 g SS/g SCOD at 70% recycling. These decreases in observed sludge yield values compares favorably to those observed with other cell lysis techniques, such as high pressure homogenization (Lan et al, 2013), microwave disintegration (Wang et al, 2015), and sonication (Velho et al, 2016).…”

Section: Resultssupporting

confidence: 68%

Transesterification of Waste Activated Sludge for Biosolids Reduction and Biodiesel Production

Maeng

Daniel²

2018

Water Environment Research

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Transesterification of waste activated sludge (WAS) was evaluated as a cost-effective technique to reduce excess biosolids and recover biodiesel feedstock from activated sludge treatment processes. A laboratory-scale sequencing batch reactor (SBR) was operated with recycling transesterification-treated WAS back to the aeration basin. Seventy percent recycling of WAS resulted in a 48% reduction of excess biosolids in comparison with a conventional SBR, which was operated in parallel as the control SBR. Biodiesel recovery of 8.0% (dried weight basis) was achieved at an optimum transesterification condition using acidic methanol and xylene as cosolvent. Average effluent soluble chemical oxygen demand (COD) and total suspended solids (TSS) concentrations from the test SBR and control SBR were comparable, indicating that the recycling of transesterification-treated WAS did not have detrimental effect on the effluent quality. This study demonstrated that transesterification and recycling of WAS may be a feasible technique for reducing excess biosolids, while producing valuable biodiesel feedstock from the activated sludge process.

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Section: Resultssupporting

confidence: 68%

Transesterification of Waste Activated Sludge for Biosolids Reduction and Biodiesel Production

Maeng

Daniel²

2018

Water Environment Research

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“…Zuriaga-Agustí et al (2012) reported that dosing 2.5 mg chlorine dioxide/g TS in a SBR achieved 43.4% reduction in excess sludge production, while results demonstrated that this technology severely deteriorated effluent quality. Lan et al (2013) achieved a 42.4% sludge reduction in a SBR under 70 MPa disruption pressure of high-pressure-homogenization, and this lysis-cryptic growth system was found imposed negligible changes in the sludge activity. Dytczak et al (2007) combined an ozonation stage with a SBR, results found that 20% returned ozonated sludge had no negative impact on the effluent quality of the SBR process.…”

Section: Introductionmentioning

confidence: 87%

“…In recent http://dx.doi.org/10.1016/j.biortech.2014.11.009 0960-8524/Ó 2014 Elsevier Ltd. All rights reserved. years, sludge reduction by cell lysis-cryptic growth has aroused much public concern and interest ( Lan et al, 2013;Lin et al, 2012;Zuriaga-Agustí et al, 2012). According to the previous investigations, this technique can be realized by means of various treatment methods including thermal, microwave, alkaline, ultrasonic, and ozone oxidation pretreatments, which these pretreatments combining the existing bio-reactors (e.g.…”

Section: Introductionmentioning

confidence: 99%

Economical evaluation of sludge reduction and characterization of effluent organic matter in an alternating aeration activated sludge system combining ozone/ultrasound pretreatment

Yang

Guo

Chen

et al. 2015

Bioresource Technology

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“…As a result of the great operational complexity and cost of the post-treatment processes, there has been an increased focus on the use of in situ excess sludge reduction processes, as they can lower excess sludge production at the origin [2,3,4]. In this regard, different approaches of microbiological or chemical processes have been employed, such as lysis–cryptic growth [5], maintenance metabolism [6], predation on bacteria [7] and uncoupled metabolism [8,9,10]. Of these techniques, uncoupled metabolism facilitated by the addition of metabolic uncouplers has been shown to be an incredibly effective technique.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Sludge Reduction of the Metabolic Uncoupler 3,3′,4′,5-tetrachlorosalicylanilide (TCS) in Activated Sludge Culture

Yang

Wei

et al. 2019

IJERPH

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Batch experiments were completed to assess the sludge reduction of the metabolic uncoupler 3,3′,4′,5-tetrachlorosalicylanilide (TCS). The effects of various TCS concentrations on sludge yield were evaluated and the mechanisms associated with sludge reduction were assessed. We discovered that TCS addition resulted in a reduction in sludge. Furthermore, a low dose of TCS (≤3 mg/L) resulted in a slight reduction in the efficiency of the wastewater treatment system, while >3 mg/L TCS reduced matrix removal efficiency, with an especially remarkable inhibition effect on ammonia removal. An increase in TCS addition was associated with a gradual decrease in both the electron transport system (ETS) activity and the specific cellular ATP (SATP) in the TCS system. It was demonstrated that TCS plays an important role in metabolic uncoupling. However, with the addition of TCS, both contents and compositions were increased, and the protein content increased more than polysaccharide production in extracellular polymeric substances (EPS). At TCS concentrations of ≤3 mg/L, DNA content was stable, but it increased rapidly from 4.97 mg/L to 15.34 mg/L as the TCS concentration was elevated from 6 mg/L to 12 mg/L. This implied that the mechanisms of sludge reduction were different for different TCS concentrations, including uncoupling metabolism, maintenance metabolism and lysis–cryptic growth.

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Reduction of excess sludge production in sequencing batch reactor (SBR) by lysis–cryptic growth using homogenization disruption

Cited by 30 publications

References 14 publications

Transesterification of Waste Activated Sludge for Biosolids Reduction and Biodiesel Production

Transesterification of Waste Activated Sludge for Biosolids Reduction and Biodiesel Production

Economical evaluation of sludge reduction and characterization of effluent organic matter in an alternating aeration activated sludge system combining ozone/ultrasound pretreatment

Assessment of the Sludge Reduction of the Metabolic Uncoupler 3,3′,4′,5-tetrachlorosalicylanilide (TCS) in Activated Sludge Culture

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