The impact of biofilm thickness-restraint and carrier type on attached growth system performance, solids characteristics and settleability

Arabgol, Raheleh; Vanrolleghem, Peter; Piculell, Maria; Delatolla, Robert

doi:10.1039/d0ew00314j

Cited by 9 publications

(6 citation statements)

References 38 publications

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“…This indicates that the testing period of 3 weeks is not adequate to achieve the required biodegradation rate of biomass. Arabgol et al [ 27 ] reported that five weeks of operation are required for full inoculation of MBBR, followed by another three weeks for reaching steady-state operation. In the case of BOD 5 , the removal efficiency varied from 89% to 95%.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of a Hybrid Moving Bed Biofilm Membrane Bioreactor and a Direct Contact Membrane Distillation System for Purification of Industrial Wastewater

et al. 2022

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Integrated wastewater treatment processes are accepted as the best option for sustainable and unrestricted onsite water reuse. In this study, moving bed biofilm reactor (MBBR), membrane bioreactor (MBR), and direct contact membrane distillation (DCMD) treatment steps were integrated successively to obtain the combined advantages of these processes for industrial wastewater treatment. The MBBR step acts as the first step in the biological treatment and also mitigates foulant load on the MBR. Similarly, MBR acts as the second step in the biological treatment and serves as a pretreatment prior to the DCMD step. The latter acts as a final treatment to produce high-quality water. A laboratory scale integrated MBBR/MBR/DCMD experimental system was used for assessing the treatment efficiency of primary treated (PTIWW) and secondary treated (STIWW) industrial wastewater in terms of permeate water flux, effluent quality, and membrane fouling. The removal efficiency of total dissolved solids (TDS) and effluent permeate flux of the three-step process (MBBR/MBR/DCMD) were better than the two-step (MBR/DCMD) process. In the three-step process, the average removal efficiency of TDS was 99.85% and 98.16% when treating STIWW and PTIWW, respectively. While in the case of the two-step process, the average removal efficiency of TDS was 93.83% when treating STIWW. Similar trends were observed for effluent permeate flux values which were found, in the case of the three-step process, 62.6% higher than the two-step process, when treating STIWW in both cases. Moreover, the comparison of the quality of the effluents obtained with the analysed configurations with that obtained by Jeddah Industrial Wastewater Treatment Plant proved the higher performance of the proposed membrane processes.

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Section: Resultsmentioning

confidence: 99%

Evaluation of a Hybrid Moving Bed Biofilm Membrane Bioreactor and a Direct Contact Membrane Distillation System for Purification of Industrial Wastewater

et al. 2022

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“…Biofilm mass was measured using a protocol described and modified by Delatolla et al (2008) , Ren et al (2016) , Schopf et al (2018) , and Arabgol et al (2020) . Biofilm carriers were harvested from MBBR reactors P N1 and P N2 and dried at 105°C overnight.…”

Section: Methodsmentioning

confidence: 99%

Design strategy and mechanism of nitrite oxidation suppression of elevated loading rate partial nitritation system

2023

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There is a current need for a low operational intensity, effective and small footprint system to achieve stable partial nitritation for subsequent anammox treatment at mainstream municipal wastewaters. This research identifies a unique design strategy using an elevated total ammonia nitrogen (TAN) surface area loading rate (SALR) of 5 g TAN/m2.d to achieve cost-effective, stable, and elevated rates of partial nitritation in a moving bed biofilm reactor (MBBR) system under mainstream conditions. The elevated loaded partial nitritation MBBR system achieves a TAN surface area removal rate (SARR) of 2.01 ± 0.07 g TAN/m2.d and NO2−-N: NH4+-N stoichiometric ratio of 1.15:1, which is appropriate for downstream anammox treatment. The elevated TAN SALR design strategy promotes nitrite-oxidizing bacteria (NOB) activity suppression rather than a reduction in NOB population as the reason for the suppression of nitrite oxidation in the mainstream elevated loaded partial nitritation MBBR system. NOB activity is limited at an elevated TAN SALR likely due to thick biofilm embedding the NOB population and competition for dissolved oxygen (DO) with ammonia-oxidizing bacteria for TAN oxidation to nitrite within the biofilm structure, which ultimately limits the uptake of DO by NOB in the system. Therefore, this design strategy offers a cost-effective and efficient alternative for mainstream partial nitritation MBBR systems at water resource recovery facilities.

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“…3,20 Although the bio-carriers provide protection for the microbial community, a large amount of biofilms are still shed due to the aeration and the complex water flow in the MBBR, which affects its water treatment capacity. [21][22][23] This symptom has been greatly alleviated by the modified bio-carriers, which can promote the adhesion of microorganisms and accelerate the formation of biofilms. 5,20,24 Moreover, using EC technology to assist the MBBR start-up has become more popular recently.…”

Section: Introductionmentioning

confidence: 99%

Effects of an electrocoagulation–air flotation–microfiltration pretreatment process on the start-up of a moving bed biofilm reactor: performance and microbial community structure

Xu,

Du,

Zhang

et al. 2024

Environ. Sci.: Water Res. Technol.

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The impact of biofilm thickness-restraint and carrier type on attached growth system performance, solids characteristics and settleability

Abstract: The moving bed biofilm reactor (MBBR) technology is a proven standalone and add-on technology for carbon and nutrient removal from municipal wastewaters. The key challenge of the carbon removal MBBR...

Cited by 9 publications

References 38 publications

Evaluation of a Hybrid Moving Bed Biofilm Membrane Bioreactor and a Direct Contact Membrane Distillation System for Purification of Industrial Wastewater

Evaluation of a Hybrid Moving Bed Biofilm Membrane Bioreactor and a Direct Contact Membrane Distillation System for Purification of Industrial Wastewater

Design strategy and mechanism of nitrite oxidation suppression of elevated loading rate partial nitritation system

Effects of an electrocoagulation–air flotation–microfiltration pretreatment process on the start-up of a moving bed biofilm reactor: performance and microbial community structure

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