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Darmayanti RF, Muharja M, Widjaja A, Widiastuti N, Rachman RA, Widyanto AR, Halim A, Satrio D, Piluharto B. Performance of modified hollow fiber membrane silver nanoparticles-zeolites Na-Y/PVDF composite used in membrane bioreactor for industrial wastewater treatment. Heliyon 2023; 9:e21350. [PMID: 37885732 PMCID: PMC10598539 DOI: 10.1016/j.heliyon.2023.e21350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 10/08/2023] [Accepted: 10/19/2023] [Indexed: 10/28/2023] Open
Abstract
Membrane bioreactor (MBR) deteriorates due to fouling on the membrane pores, which can reduce the membrane performance. To reduce membrane fouling, the addition of inorganic filler can enhance the antifouling properties. This study investigates two different membrane preparation by thermally induced phase separation (TIPS) and dip coating methods to modify hollow fiber membrane with Silver Nanoparticles (AgNPs)-Zeolites used in MBR for industrial wastewater treatment. Performance was evaluated by analyzing the flux of water and wastewater, rejection, water content, and antifouling properties. Characterization result represented the synthesized silver nanoparticles had similar diffraction peak with commercial AgNPs, then the micrograph of AgNPs and zeolites addition membrane showed that the inorganic material had an octahedral shape representing zeolite crystal and irregular shape representing AgNPs. The addition of zeolites and AgNPs resulted in satisfying performance, increased flux, rejection, and antifouling properties.
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Affiliation(s)
- Rizki Fitria Darmayanti
- Department of Agro-industrial Technology, Faculty of Agriculture, Universitas Muhammadiyah Jember, Jalan Karimata 49, Jember, 68121, Indonesia
| | - Maktum Muharja
- Department of Chemical Engineering, Faculty of Engineering, Universitas Jember, Jalan Kalimantan 37, Jember, 68121, Indonesia
| | - Arief Widjaja
- Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia
| | - Nurul Widiastuti
- Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia
| | - Rahadian Abdul Rachman
- Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia
- Wastewater Treatment Plant, PT. Kawasan Industri Gresik, Gresik, 61121, Indonesia
| | - Alvin Rahmad Widyanto
- Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia
| | - Abdul Halim
- Department of Chemical Engineering, Universitas Internasional Semen Indonesia, Gresik, 61122, Indonesia
| | - Dendy Satrio
- Department of Ocean Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Bambang Piluharto
- Biomaterial research Group, Department of Chemistry, University of Jember, Jalan Kalimantan 37, Jember, 68121, Indonesia
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2
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Iliopoulou A, Arvaniti OS, Deligiannis M, Gatidou G, Vyrides I, Fountoulakis MS, Stasinakis AS. Combined use of strictly anaerobic MBBR and aerobic MBR for municipal wastewater treatment and removal of pharmaceuticals. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 343:118211. [PMID: 37253313 DOI: 10.1016/j.jenvman.2023.118211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 06/01/2023]
Abstract
An integrated lab-scale wastewater treatment system consisting of an anaerobic Moving Bed Biofilm Reactor (AnMBBR) and an aerobic Membrane Bioreactor (AeMBR) in series was used to study the removal and fate of pharmaceuticals during wastewater treatment. Continuous-flow experiments were conducted applying different temperatures to the AnMBBR (Phase A: 35 °C; Phase B: 20 °C), while batch experiments were performed for calculating sorption and biotransformation kinetics. The total removal of major pollutants and target pharmaceuticals was not affected by the temperature of the AnMBBR. In Phase A, the average removal of dissolved chemical oxygen demand (COD), biological oxygen demand (BOD), and ammonium nitrogen (NH4-N) was 86%, 91% and 96% while in Phase B, 91%, 96% and 96%, respectively. Removal efficiencies ranging between 65% and 100% were observed for metronidazole (MTZ), trimethoprim (TMP), sulfamethoxazole (SMX), and valsartan (VAL), while slight (<30%) or no removal was observed for carbamazepine (CBZ) and diclofenac (DCF), respectively. Application of a mass balance model showed that the predominant mechanism for the removal of pharmaceuticals was biotransformation, while the role of sorption was of minor importance. The AeMBR was critical for VAL, SMX and TMP biodegradation; the elimination of MTZ was strongly enhanced by the AnMBBR. In both bioreactors, Bacteroidetes was the dominant phylum in both bioreactors over time. In the AnMBBR, Cloacibacterium and Bacteroides had a higher abundance in the biocarriers compared to the suspended biomass.
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Affiliation(s)
- Athanasia Iliopoulou
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Olga S Arvaniti
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece; Department of Agricultural Development, Agrofood and Management of Natural Resources, National and Kapodistrian University of Athens, Psachna, 34400, Greece
| | - Michalis Deligiannis
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Georgia Gatidou
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Ioannis Vyrides
- Department of Chemical Engineering, Cyprus University of Technology, 95 Eirinis Str., Limassol, 3603, Cyprus
| | - Michalis S Fountoulakis
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Athanasios S Stasinakis
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece.
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3
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Xiao K, Wang K, Yu S, Yuan Y, Qin Y, An Y, Zhao X, Zhou Z. Membrane fouling behavior in membrane bioreactors for nitrogen-deficient wastewater pretreated by ammonium ion exchange. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2022.121087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Miwa T, Takimoto Y, Mizuta Y, Hatamoto M, Watari T, Yamaguchi T. An increase in sludge loading rate induces gel fouling in membrane bioreactors treating real sewage. CHEMOSPHERE 2022; 309:136557. [PMID: 36185000 DOI: 10.1016/j.chemosphere.2022.136557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/29/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
The main objective of this study was to investigate the cause of gel fouling in membrane bioreactors (MBRs) treating real sewage in terms of soluble microbial products (SMPs) and microbial aspects. Two anoxic/oxic-MBRs were operated as the control reactor (S1) and the sludge loading rate increased reactor (S2). The reactors were operated under low-temperature around 11 °C conditions. Membrane permeability substantially decreased in S2, and gel layer biofilm was formed on membrane surface. In contrast, the permeability of S1 gradually decreased and cake layer formed. When gel fouling occurred, the protein and polysaccharide of SMP in S2 were 47 and 23 mg L-1, which were significantly lower than those recorded in S1 accounted for 118 and 68 mg L-1, respectively. Furthermore, the total organic carbon concentration of SMPs was 24 mg L-1, which was lower than the influent in S2, accounted for 62 mg L-1. Finally, Campylobacteraceae which exists in sewage and uncultured OD1, dominated the gel layer biofilm in S2, unlike the cake layer biofilm in S1. These results indicated that the gel layer biofilm might be composed of influent substances, demonstrating the importance of influent decomposition in MBR for gel fouling mitigation.
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Affiliation(s)
- Toru Miwa
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Yuya Takimoto
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566, Japan
| | - Yuki Mizuta
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan.
| | - Takahiro Watari
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan; Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
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5
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Nguyen AQ, Nguyen LN, Xu Z, Luo W, Nghiem LD. New insights to the difference in microbial composition and interspecies interactions between fouling layer and mixed liquor in a membrane bioreactor. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120034] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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6
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Nakamura A, Honma N, Tanaka Y, Suzuki Y, Shida Y, Tsuda Y, Hidaka K, Ogasawara W. 7-Aminocoumarin-4-acetic Acid as a Fluorescent Probe for Detecting Bacterial Dipeptidyl Peptidase Activities in Water-in-Oil Droplets and in Bulk. Anal Chem 2021; 94:2416-2424. [PMID: 34963280 PMCID: PMC8886566 DOI: 10.1021/acs.analchem.1c04108] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
Droplet-based
microfluidic systems are a powerful tool for biological
assays with high throughput. Water-in-oil droplets (WODLs) are typically
used in droplet-based microfluidic systems to culture microorganisms
and perform enzyme assays. However, because of the oil surrounding
the nanoliter and picoliter volumes of WODLs, availability of suitable
substrates is limited. For instance, although 7-amino-4-methylcoumarin
(AMC) is commonly used as a fluorescent probe of the substrate to
detect peptidase activity, AMC leaks from WODLs to the oil phase due
to its high hydrophobicity. Thus, AMC substrates cannot be used in
droplet-based microfluidic systems with WODLs. In this study, we developed
a peptidase substrate consisting of a dipeptide and 7-aminocoumarin-4-acetic
acid (ACA), an AMC-derived fluorogenic compound. ACA was retained
in the WODL for more than 7 days, and the dipeptidyl ACA substrate
detected dipeptidyl peptidase (DPP) activity in the WODL. Compared
to AMC substrates, the substrate specificity constants of DPPs for
ACA substrates increased up to 4.7-fold. Fluorescence-activated droplet
sorting made high-throughput screening of microorganisms based on
DPP activity using the dipeptidyl ACA substrate possible. Since ACA
could be applied to various substrates as a fluorescent probe, detectable
microbial enzyme activities for droplet-based microfluidic systems
can be largely expanded.
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Affiliation(s)
- Akihiro Nakamura
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Nobuyuki Honma
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Yuma Tanaka
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Yoshiyuki Suzuki
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Yosuke Shida
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Yuko Tsuda
- Faculty of Pharmaceutical Sciences, Cooperative Research Center of Life Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, Hyogo 650-8586, Japan
| | - Koushi Hidaka
- Graduate School of Health Sciences, Kobe University, 7-10-2 Tomogaoka, Suma-ku, Kobe, Hyogo 654-0142, Japan
| | - Wataru Ogasawara
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan.,Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
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7
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Dang BT, Bui XT, Itayama T, Ngo HH, Jahng D, Lin C, Chen SS, Lin KYA, Nguyen TT, Nguyen DD, Saunders T. Microbial community response to ciprofloxacin toxicity in sponge membrane bioreactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145041. [PMID: 33940712 DOI: 10.1016/j.scitotenv.2021.145041] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/30/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Abstract
This study aims to offer insights into how ciprofloxacin (CIP) impact bacterial community structures in the Sponge-MBR process when CIP is spiked into hospital wastewater. We found that the CIP toxicity decreased richness critical phylotypes such as phylum class ẟ-, β-, ɣ-proteobacteria, and Flavobacteria that co-respond to suppress denitrification and cake fouling to 37% and 28% respectively. Cluster analysis shows that the different community structures were formed under the influence of CIP toxicity. CIP decreased attached growth biomass by 2.3 times while increasing the concentration of permeate nitrate by 3.8 times, greatly affecting TN removal by up to 26%. Ammonia removal was kept stable by inflating the ammonia removal rate (p < 0.003), with the wealthy Nitrospira genus guaranteeing the nitrification activity. In addition, we observed an increasing richness of Chloroflexi and Planctomycetes, which may play a role in fouling reduction in the Sponge-MBR. Therefore, if the amount of antibiotics in hospital wastewater continues to increase, it is so important to extend biomass retention for denitrification recovery.
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Affiliation(s)
- Bao-Trong Dang
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan; Ho Chi Minh City University of Technology (HUTECH) 475A, Dien Bien Phu, Ward 25, Binh Thanh District, Ho Chi Minh City, Viet Nam
| | - Xuan-Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung ward, Thu Duc district, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam.
| | - Tomoaki Itayama
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
| | - Huu Hao Ngo
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Australia
| | - Deokjin Jahng
- Department of Environmental Engineering and Energy, Myongji University, Republic of Korea
| | - Chitsan Lin
- College of Maritime, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan.
| | - Shiao-Shing Chen
- Institute of Environmental Engineering and Management, National Taipei University of Technology, Taipei, Taiwan
| | - Kun-Yi Andrew Lin
- Department of Environmental Engineering, National Chung Hsing University, No. 250 Kuo-Kuang Road, Taichung 402, Taiwan
| | - Thanh-Tin Nguyen
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
| | - Dinh Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Todd Saunders
- Graduate School of Biomedical Science, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
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8
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Takimoto Y, Hatamoto M, Soga T, Kuratate D, Watari T, Yamaguchi T. Maintaining microbial diversity mitigates membrane fouling of an anoxic/oxic membrane bioreactor under starvation condition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:143474. [PMID: 33213916 DOI: 10.1016/j.scitotenv.2020.143474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/25/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
The aim of this study was to evaluate the contribution of dissolved organic carbon (DOC) and microbial community dynamics to membrane fouling development in membrane bioreactor (MBR). We operated laboratory-scale anoxic/oxic-MBRs under prolonged starvation conditions in different seasons and the dynamics and diversity of the microbial communities were investigated. Although fouled-MBRs showed DOC accumulation in the activated sludge (AS), the fouling-mitigated MBR suggested that dissolved oxygen was consumed and DOC of the sludge supernatant was degraded. 16S rRNA genes analysis of AS in the MBRs revealed that Chitinophagaceae and Candidatus Promineofilum specifically increased in the fouling-mitigated MBR, suggesting that they played important roles in membrane fouling mitigation; high microbial diversity in the reactor also contributed to fouling mitigation. In the fouled reactor, enrichment of Xanthomonadaceae might be related to fouling causing substances formation leading to membrane fouling development; lower microbial diversity also contributed to fouling development in the fouled MBR.
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Affiliation(s)
- Yuya Takimoto
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Masashi Hatamoto
- Department of Civil and Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan.
| | - Toru Soga
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Daiki Kuratate
- Department of Civil and Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Takahiro Watari
- Department of Civil and Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan; Department of Civil and Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
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9
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Miwa T, Takimoto Y, Hatamoto M, Kuratate D, Watari T, Yamaguchi T. Role of live cell colonization in the biofilm formation process in membrane bioreactors treating actual sewage under low organic loading rate conditions. Appl Microbiol Biotechnol 2021; 105:1721-1729. [PMID: 33481065 DOI: 10.1007/s00253-021-11119-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 12/15/2020] [Accepted: 01/16/2021] [Indexed: 11/28/2022]
Abstract
Biofilm development on the membrane surface is one of the main reasons for membrane fouling in membrane bioreactors (MBRs) and it is a big problem for their stable operation. Precise information on the microbial community composition of the biofilm is needed for a better understanding of biofilm development. However, there have been limited investigations of the relationship between the biofilm formation process and the microbial community of activated sludge and biofilm in MBRs treating real sewage. In this study, relationships between the microbial community structure of biofilm and activated sludge at each biofilm formation stage were investigated and biofilm growth was elucidated by nondestructive observations. Two anoxic/oxic MBRs were operated and membrane fouling was induced. Permeability rapidly decreased in both reactors and live cell microcolonies were formed on dead cell conditioning film on the membrane surface. Principal component analysis based on 16S rRNA gene sequences showed that the biofilm microbial community changed significantly from middle stage to mature biofilm when compared with that of activated sludge. The abundance of specific bacteria, such as unclassified Neisseriaceae, increased in middle-stage biofilm and the diversity indexes of middle-stage biofilm were lower than those of mature biofilm and activated sludge. These results suggested that the presence of specific bacteria with colonization ability played a crucial role in biofilm formation. Strategies are needed to target membrane fouling mitigation during early- and middle-stage biofilm formation to reduce MBR membrane fouling. KEY POINTS: • Microbial community of mature biofilm was approached to that of activated sludge. • In the middle-stage biofilm, live cells colonized on a dead-cell-conditioning-film. • Microbial diversity was lower in live cell colonizing stage than in activated sludge.
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Affiliation(s)
- Toru Miwa
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Yuya Takimoto
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan.
| | - Daiki Kuratate
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Takahiro Watari
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan.,Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, 940-2188, Japan
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10
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Adam JA, Gulati S, Hirsa AH, Bonocora RP. Growth of microorganisms in an interfacially driven space bioreactor analog. NPJ Microgravity 2020; 6:11. [PMID: 32284962 PMCID: PMC7142127 DOI: 10.1038/s41526-020-0101-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 03/06/2020] [Indexed: 11/09/2022] Open
Abstract
Fluid bioreactors in microgravity environments may utilize alternative methods of containment and mixing. The ring-sheared drop (RSD) is a containerless mixing device which functions in microgravity using surface tension for containment and mixes through interfacially-driven flow. To assess the feasibility of using interfacially driven flow devices, such as the RSD, as bioreactors, Escherichia coli growth and recombinant protein expression were analyzed in a ground-based analog of the RSD called the knife edge surface viscometer (KEV). Results demonstrated that the KEV can facilitate the growth of E. coli and that growth rate increases logarithmically with increasing knife edge rotation rate, similar to the standard growth method on Earth (orbital shaker). Furthermore, the KEV was shown to be viable for supporting recombinant protein expression in E. coli at levels comparable to those achieved using standard growth methods.
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Affiliation(s)
- Joe A Adam
- 1Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 USA
| | - Shreyash Gulati
- 1Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 USA
| | - Amir H Hirsa
- 1Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 USA.,2Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 USA
| | - Richard P Bonocora
- 3Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 USA
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11
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Tay MF, Lee S, Xu H, Jeong K, Liu C, Cornelissen ER, Wu B, Chong TH. Impact of salt accumulation in the bioreactor on the performance of nanofiltration membrane bioreactor (NF-MBR)+Reverse osmosis (RO) process for water reclamation. WATER RESEARCH 2020; 170:115352. [PMID: 31812816 DOI: 10.1016/j.watres.2019.115352] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 11/25/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
The impacts of salt accumulation, through adjusting the solid retention time (SRT), in the bioreactor on the bioprocess as well as membrane performance of a high retention nanofiltration membrane bioreactor (NF-MBR) and subsequent reverse osmosis (RO) process for water reclamation are addressed in this study. The build-up of salts (i.e., Ca, Mg, PO4) is a function of SRT, hydraulic retention time (HRT) and membrane rejection. Despite the accumulation of salts, both NF-MBRs at SRT of 30 and 60 days, achieved (i) similar biodegradation efficiency; (ii) excellent organic removal (> 97%); and (iii) excellent ammonia removal (> 98%). Extending the SRT could improve the microbial bio-flocculation capability, but did not influence the microbial activity, viability, and community structure. However, more severe membrane fouling was observed in the NF-MBR with elevated salt levels, which was attributed to the greater formation of calcium phosphate scale and Ca-polysaccharides complex (i.e., irreversible fouling layer) as well as the cake-enhanced-osmotic-pressure (CEOP) effect. Although both NF-MBRs produced comparable quality of permeate, a higher RO membrane fouling rate was observed when the permeate of NF-MBR with SRT at 60 days was fed to the RO system, implying organic compositions in NF-MBR permeate may influence RO performance.
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Affiliation(s)
- Ming Feng Tay
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - Seonki Lee
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - Huijuan Xu
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - Kwanho Jeong
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - Chang Liu
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore; School of Environment and Resource, Southwest University of Science and Technology, 621010, Mianyang, China
| | - Emile R Cornelissen
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore; KWR Watercycle Research Institute, 3433 PE, Nieuwegein, Netherlands; Particle and Interfacial Technology Group, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Bing Wu
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore; Faculty of Civil and Environmental Engineering, University of Iceland, Hjardarhagi 2-6, IS-107 Reykjavik, Iceland.
| | - Tzyy Haur Chong
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore.
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