Organic carbon recovery modeling for a rotating belt filter and its impact assessment on a plant-wide scale

Behera, Chitta Ranjan; Santoro, Domenico; Gernaey, Krist V.; Sin, Gürkan

doi:10.1016/j.cej.2017.11.091

Cited by 31 publications

(30 citation statements)

References 35 publications

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“…To evaluate the impact of cellulose recovery by primary treatment, a cost analysis was conducted based on the following assumptions: (a) cellulose removal efficiency through primary treatment is 80%; (b) cellulose degradation efficiency through biological treatment is 80% in case of biological treatment preceded by primary treatment and 85% for without primary treatment; (c) anaerobic cellulose degradation efficiency is 70% (Behera et al, ) and the WAS noncellulose VSS reduction is 50% in the anaerobic digester; (d) biomass yield is 0.44 gVSS/gCOD; (e) average SRT in the secondary treatment is 10 days; (f) decay coefficient k d = 0.1 day −1 ; (g) power consumption of 1 kWH/kg O 2 , and energy price is $0.1/kWh (https://www.ontarioenergyreport.ca/); and (h) sludge handling cost is $684/dry ton solids (Vasileski, ).…”

Section: Resultsmentioning

confidence: 99%

“…Behera, Santoro, Gernaey, and Sin () modeled the impact of organic carbon recovery (including cellulose) using RBF on methane gas production and aeration energy assuming that cellulose fraction in the influent varies from 25% to 40% of the influent COD. Furthermore, cellulose anaerobic and aerobic biodegradabilities were assumed to be between 50%–70% and 15%–35%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Fate of cellulose in primary and secondary treatment at municipal water resource recovery facilities

Ahmed

Bahreini

et al. 2019

Water Environment Research

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Cellulose from toilet paper is a significant fraction of particulate organics, which is recoverable. For the first time, comprehensive mapping and tracking the fate of cellulose across various unit processes at full‐scale in two water resource recovery facilities located in North America and Europe was undertaken. The influent cellulose content accounted for approximately one‐third of the total suspended solids (TSS). Although about 80% of the raw wastewater cellulose was removed in primary treatment, the type of primary treatment process (rotating belt filter [RBF] vs. primary clarification [PC]) had a significant impact on cellulose capture and diversion. The high cellulose content of the RBF sludge accounting for 35% of the TSS facilitates cellulose recovery. For the North American plant, with a conventional activated sludge process (SRT of 6–7 days, preceded by PC), cellulose biodegradation efficiencies of 70%–90% of the PC effluent were observed in summer and winter. For the European plant, with a modified University of Cape Town process (SRT of 14 days, without primary treatment in train 2, or preceded by RBF in train 1), comparable cellulose biodegradation efficiencies were also observed. Results from laboratory SBRs indicated that cellulose biodegradation efficiency at room temperature was 86% of the influent cellulose. Practitioner points Cellulose fate was tracked across two different WWTPs in two different geographies. Cellulose in the influent wastewater accounted for 1/3 of the total suspended solids. Primary treatments were able to capture more than 80% of the influent cellulose. Cellulose was biodegraded in secondary treatment, resulting an effluent of 2–3 mg/L.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fate of cellulose in primary and secondary treatment at municipal water resource recovery facilities

Ahmed

Bahreini

et al. 2019

Water Environment Research

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“…that is mainly originated from toilet papers (Behera et al 2018). These cellulose fibres easily enter biological treatment systems of WWTPs if they are not separated during the primary treatment;…”

Section: Recovered Materials: Cellulosementioning

confidence: 99%

Validated innovative approaches for energy-efficient resource recovery and re-use from municipal wastewater: From anaerobic treatment systems to a biorefinery concept

Akyol

Foglia

Özbayram

et al. 2019

Critical Reviews in Environmental Science and Technology

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The development of innovative technologies in wastewater treatment create the concept of biorefinery in wastewater treatment plants (WWTPs), placing anaerobic processes in the highlight. Starting from the conventional anaerobic treatment processes to "closing the loop" scheme, next generation WWTPs are ready to serve for water, energy and materials mining. While bioenergy is still dominating the resource recovery, recovery of value-added materials (i.e. struvite, biopolymers, cellulose) are receiving significant attention in recent years. So, what are the state-of-the-art approaches for energy-efficient resource recovery and re-use from municipal wastewater? This paper follows a critical review on the validated technologies in operational environment available and further suggests possible market routes for the recovered materials in WWTPs. Considering the development and verification of a novel technology together with the valorisation of the obtained products, biorefinery and resource recovery approaches were gathered in this review paper from a circular economy point of view. General currently-faced barriers were briefly addressed to pave the way to a create to-the-point establishments of resource recovery facilities in the future.

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“…The separation provided by PF and RBF augments the quality of the sludge diverted to digestion due to the increase in its energy value, compared to sludge produced from primary clarification (Behera, Santoro, Gernaey, & Sin, 2018). Harvesting higher COD content in primary sludge in comparison with waste activated sludge (WAS) enables significant energy savings via carbon redirection (Caliskaner et al., 2014; Gori, Giaccherini, Jiang, Sobhani, & Rosso, 2013; Gori et al., 2011).…”

Section: Introductionmentioning

confidence: 99%

Oxygen transfer and plant‐wide energy assessment of primary screening in WRRFs

Pasini

Garrido-Baserba

Ahmed

et al. 2020

Water Environment Research

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Primary screening is gaining interest as a method to achieve removal performances comparable to primary clarification while reducing the footprint and increasing operational elasticity. Aeration efficiency indicators in a pilot sequential batch reactor (SBR) and a full scale water resource recovery facility (WRRF) were investigated after the implementation of rotating belt filters/screens (RBF). To compare the impact between screened (350 μm) and nonscreened primary influent, two identical treatment lines were monitored using off‐gas and respirometric measurements. The study provides the first result on improved oxygen transfer efficiency due to primary screening. Consistent aeration efficiency improvements of 27% and 20% between screened and nonscreened were obtained at pilot and full scale, respectively. Changes in aeration efficiency and carbon redirection were integrated into a set of models to investigate the primary screening impact on the WRRF energy balance. While the plant‐wide assessment for different scenarios improved the energy balance up to 15%, a detailed comparative analysis between various treatment schemes gained insight into the advantages and limitations of the energetic sustainability of primary screening. Practitioner points Aeration efficiency improved 27% at pilot scale Aeration efficiency improved 20% at full scale. Use of primary screening can improve the energy balance up to 15 Assessment of advantages and limitations of primary screening.

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Organic carbon recovery modeling for a rotating belt filter and its impact assessment on a plant-wide scale

Cited by 31 publications

References 35 publications

Fate of cellulose in primary and secondary treatment at municipal water resource recovery facilities

Fate of cellulose in primary and secondary treatment at municipal water resource recovery facilities

Validated innovative approaches for energy-efficient resource recovery and re-use from municipal wastewater: From anaerobic treatment systems to a biorefinery concept

Oxygen transfer and plant‐wide energy assessment of primary screening in WRRFs

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