Accelerated startup of moving bed biofilm process with novel electrophilic suspended biofilm carriers

Mao, Yanjun; Quan, Xie; Zhao, Huimin; Zhang, Yaobin; Chen, Shuo; Liu, Tao; Quan, Wuzhe

doi:10.1016/j.cej.2017.01.041

Cited by 94 publications

(26 citation statements)

References 32 publications

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“…The results also implied that the novel carriers facilitated biofilm adhesion, and thus accelerated SND start‐up. Moreover, considering that proteins were amphoteric, the novel carriers with positively charged surfaces (+11.7 mV) changed the isoelectric point and greatly promoted proteins formation …”

Section: Resultsmentioning

confidence: 99%

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Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Liu

Jia

Quan

2017

J of Chemical Tech & Biotech

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BACKGROUND The integrated free‐floating biofilm and activated sludge (IFFAS) process is an ideal candidate for simultaneous nitrification and denitrification (SND). However, traditional carriers have their inherent drawbacks, such as the weak hydrophilicity and negative charges on the surface. In this study, novel carriers with favorable hydrophilicity and electrophilicity were prepared and implemented in an IFFAS‐based SND reactor. RESULTS Compared with traditional carriers, the water contact angle of the novel carriers dropped to 60.2° and positive charges on the surface (+11.7 mV, pH 7.0) were acquired. Through accurate control of dissolved oxygen (DO), it took only 30 days to start SND, with a total nitrogen (TN) removal efficiency of 80.2%. In contrast, the start‐up period was 42 days with weaker TN removal capacity in a control reactor filled with traditional carriers. Novel carriers provided a favorable niche for more types of bacteria to survive, of which Nitrosomonadales and Nitrospirale were identified as nitrifiers while anoxic denitrifiers, aerobic denitrifiers and anammox bacteria also co‐existed in the system, contributing to TN removal. CONCLUSION Novel carriers with favorable hydrophilicity and electrophilicity were successfully prepared through a relatively facile approach, and a novel carriers‐based SND process enabled a shorter start‐up period, higher biomass and better TN removal efficiency. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

“…Moreover, considering that proteins were amphoteric, the novel carriers with positively charged surfaces (+11.7 mV) changed the isoelectric point and greatly promoted proteins formation. 23 wileyonlinelibrary.com/jctb…”

Section: Biofilm Development On Carriersmentioning

confidence: 99%

Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Liu

Jia

Quan

2017

J of Chemical Tech & Biotech

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“…The municipal sewage was consistently and intermittently fed into the biofilm reactors (R1 and R2). During the experiment, the hydraulic retention time (HRT), DO and COD among other structural parameters were measured [35,47,48]. Figure 3 shows the scanning electron microscope (SEM, Field Emission Scanning Electron Microscope, JSM-7001F JEOL-Japan) images of the NM-WCC and MWCC which displayed the surface morphology of the materials.…”

Section: Modification Of Wcc Fillermentioning

confidence: 99%

Assessing the performance of modified waste cotton cloth (MWCC) installed in a biological contact reactor as a biofilm carrier used for domestic wastewater treatment

et al. 2019

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The current study examined the performance of modified waste cotton cloth (MWCC) in the removal of organic pollutants from domestic wastewater as an emerging technique for waste textile resource management and reuse. The MWCC biofilm carrier was self-made with discarded cotton cloths cut into smaller strips with 66 cm long and average weight of 2.4 g each. The surface of the non-modified waste cotton cloth (NM-WCC) was modified through the hydrosulphuric acid (H 2 SO 4) method to enhance the physical characteristics of the material such as hydrophilicity and biofilm attachment. The best filling rate of the carrier used for the experiment was 65% as determined by preliminary studies. Two self-made biological contact biofilm reactors: R1 (installed with NM-WCC) and R2 (fixed with MWCC), were used for the experiment. The experimental results showed that MWCC had higher removal efficacy of chemical oxygen demand, ammonia-nitrogen (NH 4 +-N) and total phosphorus (TP) at 98.34%, 85.44% and 60.20%, respectively. The hydraulic retention time decreased from 21 to 8 h on the 4th day. The scanning electron microscope was used to analyse the surface characteristics of the NM-WCC and MWCC. The water-holding capacity of the biofilm carriers was determined through the static immersion method and ASTM D1117-80 guiding principles. The water contact angle was estimated through the static process by adapting Young's equation. The findings of this research could significantly contribute to the discovering of alternative innovative technological prospects of utilizing H 2 SO 4 MWCC as an effective biofilm carrier in domestic wastewater treatment.

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“…Moreover, the biochars for MFC anode have the potential to be reused. For example, the lightweight material with mature biofilms can be used as a biofilm carrier in wastewater treatment processes, presenting positive environmental effects [29]. The cocklebur fruit-derived biochar, with excellent performance and low cost, can be a suitable anode candidate for large-scale MFCs.…”

Section: Long-term Performance Of Microbial Fuel Cellsmentioning

confidence: 99%

Packed anode derived from cocklebur fruit for improving long-term performance of microbial fuel cells

et al. 2018

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Packed anode of microbial fuel cells (MFCs), commonly with a dense structure, suffers from the clogging, resulting in unsatisfied long-term stability of MFCs. Herein, we fabricate a biochar-based packed anode with a loose structure to enhance the long-term performance of MFCs equipped with packed anodes. The biochar, derived from cocklebur fruit, endows the packed anode with a loose structure but excellent conductivity. Once incorporated into MFCs, the biochar-based packed anode can yield comparable performance to benchmark materials. Particularly, the biochar-based MFCs present no obvious decrease of the power output during 150 days' operation, which is attributed to the clogging-resistant effect induced by the loose structure of biochar-based anode. The cocklebur fruit-derived biochar can be a promising candidate for MFC anodes, and should facilitate both scaling-up and practical applications of MFCs.

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Accelerated startup of moving bed biofilm process with novel electrophilic suspended biofilm carriers

Cited by 94 publications

References 32 publications

Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Accelerated start‐up and microbial community structures of simultaneous nitrification and denitrification using novel suspended carriers

Assessing the performance of modified waste cotton cloth (MWCC) installed in a biological contact reactor as a biofilm carrier used for domestic wastewater treatment

Packed anode derived from cocklebur fruit for improving long-term performance of microbial fuel cells

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