keyword
https://read.qxmd.com/read/38518879/new-insights-into-nitrogen-removal-by-divalent-iron-enhanced-moving-bed-biofilm-reactor-performance-interfacial-interaction-and-co-occurrence-network
#1
JOURNAL ARTICLE
Mengcheng Sheng, Zhiqing Ye, Fang Zhu, Dandan Pan, Sicheng Shao, Xiangwei Wu
A divalent iron-mediated moving bed biofilm reactor with intermittent aeration was developed to enhance the nitrogen removal at low carbon-to-nitrogen ratios. The study demonstrated thatammonia removal increased from 51 ± 4 % to 79 ± 4 % and nitrate removal increased from 72 ± 5 % to 98 ± 4 % in phases I-IV, and 2-5 mg·L-1 of divalent iron significantly increased the anoxic denitrification process. Divalent iron stimulated the secretion of extracellular polymeric substances, which facilitated the formation of cross-linked network between microbial cells...
March 20, 2024: Bioresource Technology
https://read.qxmd.com/read/38490615/carbon-neutrality-in-wastewater-treatment-plants-an-integrated-biotechnological-based-solution-for-nutrients-recovery-odour-abatement-and-co-2-conversion-in-alternative-energy-drivers
#2
JOURNAL ARTICLE
Federica Pasquarelli, Giuseppina Oliva, Aniello Mariniello, Antonio Buonerba, Chi-Wang Li, Vincenzo Belgiorno, Vincenzo Naddeo, Tiziano Zarra
Wastewater treatment plants play a crucial role in water security and sanitation, ensuring ecosystems balance and avoiding significant negative effects on humans and environment. However, they determine also negative pressures, including greenhouse gas and odourous emissions, which should be minimized to mitigate climate changes besides avoiding complaints. The research has been focused on the validation of an innovative integrated biological system for the sustainable treatment of complex gaseous emissions from wastewater treatment plants...
March 13, 2024: Chemosphere
https://read.qxmd.com/read/38475926/biofilm-colonization-and-succession-in-a-full-scale-partial-nitritation-anammox-moving-bed-biofilm-reactor
#3
JOURNAL ARTICLE
Carolina Suarez, Tage Rosenqvist, Ivelina Dimitrova, Christopher J Sedlacek, Oskar Modin, Catherine J Paul, Malte Hermansson, Frank Persson
BACKGROUND: Partial nitritation-anammox (PNA) is a biological nitrogen removal process commonly used in wastewater treatment plants for the treatment of warm and nitrogen-rich sludge liquor from anaerobic digestion, often referred to as sidestream wastewater. In these systems, biofilms are frequently used to retain biomass with aerobic ammonia-oxidizing bacteria (AOB) and anammox bacteria, which together convert ammonium to nitrogen gas. Little is known about how these biofilm communities develop, and whether knowledge about the assembly of biofilms in natural communities can be applied to PNA biofilms...
March 12, 2024: Microbiome
https://read.qxmd.com/read/38452528/improved-efficiency-and-stability-using-a-novel-elemental-sulfur-based-moving-bed-denitrification-process
#4
JOURNAL ARTICLE
Jia-Min Xu, Hu-Yi Zi, Hao-Ran Xu, Yi-Fan Zhang, Da-Heng Ren, Ran Zeng, Gui-Jiao Zhang, Aijie Wang, Hao-Yi Cheng
Elemental sulfur-based denitrification (ESDeN) technology is known as a cost-saving alternative to its heterotrophic counterpart for nutrient removal from organic-deficient water. However, the traditional fixed-bed reactor (FixBR), as an extensively used process, suffers from a low denitrification rate and even performance deterioration during long-term operation. Herein, we proposed a novel elemental sulfur-based denitrifying moving-bed reactor (ESDeN-MovBR), in which a screw rotator was employed to drive the filled sulfur particles to be microfluidized vertically (a state of vertical-loop movement)...
February 27, 2024: Water Research
https://read.qxmd.com/read/38441647/thauera-sp-for-efficient-nitrate-removal-in-continuous-denitrifying-moving-bed-biofilm-reactor
#5
JOURNAL ARTICLE
Roshni J Patel, Anuradha S Nerurkar
Thauera is the most widely found dominant denitrifying genus in wastewater. In earlier study, MBBR augmented with a specially developed denitrifying five-membered bacterial consortium (DC5) where Thauera was found to be the most abundant and persistent genus. Therefore, to check the functional potential of Thauera in the removal of nitrate-containing wastewater in the present study Thauera sp.V14 one of the member of the consortium DC5 was used as the model organism. Thauera sp.V14 exhibited strong hydrophobicity, auto-aggregation ability, biofilm formation and denitrification ability, which indicated its robust adaptability short colonization and nitrate removal efficiency...
March 5, 2024: Bioprocess and Biosystems Engineering
https://read.qxmd.com/read/38437971/biofilm-viability-and-microbial-community-of-non-inoculated-moving-bed-biofilm-reactor-in-nile-tilapia-oreochromis-niloticus-cultivation
#6
JOURNAL ARTICLE
Leonardo Schorcht Bracony Porto Ferreira, Marco Shizuo Owatari, Alex Pires de Oliveira Nuñer, Katt Regina Lapa
The aim of this study was to evaluate two moving bed biofilm reactors (MBBR) without nitrifying bacteria inoculation. Biofilms and viable bacterial colonies were evaluated after 124 days. MBBR bioreactors received water from Oreochromis niloticus fish farming and water quality parameters were monitored daily. Four distinct phases with different fish stocking density were established.: phase 1 (2.40 kg m-3 ), phase 2 (4.95 kg m-3 ), phase 3 (8.71 kg m-3 ) and phase 4 (12...
March 2, 2024: Bioresource Technology
https://read.qxmd.com/read/38401210/eat-seldom-is-better-than-eat-frequently-pharmaceuticals-degradation-kinetics-enantiomeric-profiling-and-microorganisms-in-moving-bed-biofilm-reactors-are-affected-by-feast-famine-cycle-times
#7
JOURNAL ARTICLE
Chuanzhou Liang, Sif B Svendsen, Nadieh de Jonge, Pedro N Carvalho, Jeppe Lund Nielsen, Kai Bester
Feast-famine (FF) regimes improved the removal of recalcitrant pharmaceuticals in moving bed biofilm reactors (MBBRs), but the optimal FF cycle remained unresolved. The effects of FF cycle time on the removal of bulk substrates (organic carbon and nitrogen) and trace pharmaceuticals by MBBR are systematically evaluated in this study. The feast to famine ratio was fixed to 1:2 to keep the same loading rate, but the time for the FF cycles varied from 18 h to 288 h. The MBBR adapted to the longest FF cycle time (288 h equaling 48 × HRT) resulted in significantly higher degradation rates (up to +183%) for 12 out of 28 pharmaceuticals than a continuously fed (non-FF) reactor...
February 9, 2024: Journal of Hazardous Materials
https://read.qxmd.com/read/38377913/coagulative-removal-of-polystyrene-microplastics-from-aqueous-matrices-using-fecl-3-chitosan-system-experimental-and-artificial-neural-network-modeling
#8
JOURNAL ARTICLE
Shubham Raj, Byomkesh Mahanty, Subrata Hait
Effluent from sewage treatment plants (STPs) is a significant source of microplastics (MPs) re-entry into the environment. Coagulation-flocculation-sedimentation (CFS) process as an initial tertiary treatment step requires investigation for coagulative MPs removal from secondary-treated sewage effluents. In this study, experiments were conducted on synthetic water containing 25 mg/L polystyrene (PS) MPs using varying dosages of FeCl3 (1-10 mg/L) and chitosan (0.25-9 mg/L) to assess the effect of process parameters, such as pH (4-8), stirring speed (0-200 rpm), and settling time (10-40 min)...
February 17, 2024: Journal of Hazardous Materials
https://read.qxmd.com/read/38359626/reliability-of-organic-and-biogenic-pollutant-removal-in-selected-technologies-used-in-domestic-wastewater-treatment-plants-a-comparative-analysis
#9
JOURNAL ARTICLE
Andrzej Jucherski, Andrzej Walczowski, Piotr Bugajski, Agnieszka Operacz
The results of a comparative study of two different technological solutions applicable to decentralised domestic wastewater treatment systems are presented. A hybrid reactor with activated sludge and mobile biofilm carriers moving in wastewater is one of them, and an innovative quasi-technical combination of a biological reactor with a sprinkled bed filled with sintered clay granules, followed in the process line by an innovative slope type filtration bed, is the other one. The study has shown a significant advantage of filter bed installations in functional quality, expressed in low values of indicators and pollutant concentrations...
February 13, 2024: Journal of Environmental Management
https://read.qxmd.com/read/38342280/novel-flocking-materials-as-biocarriers-in-moving-bed-biofilm-reactor-for-improving-simultaneous-nitrification-and-denitrification-performance
#10
JOURNAL ARTICLE
Mingyi Lu, Feng Zhao, Fan Qin, Fengyuan Zhang, Quan Feng, Rongbo Guo
Biocarrier is the key factor for the stable operation of moving bed biofilm reactor (MBBR). To achieve efficient simultaneous nitrification and denitrification (SND), this study provided novel flocking materials as biocarriers. The biofilm formation experiment showed that longer flocking carrier was more conducive to biomass accumulation, resulting in greater oxygen uptake rate. The continuous operation results showed that the total nitrogen removal and SND performance of the MBBR with the addition of 5.0 mm flocking carriers reached 52...
February 9, 2024: Bioresource Technology
https://read.qxmd.com/read/38335750/transformation-mechanisms-of-the-antidepressant-citalopram-in-a-moving-bed-biofilm-reactor-substrate-depended-pathways-eco-toxicities-and-enantiomeric-profiles
#11
JOURNAL ARTICLE
Chuanzhou Liang, Zhiyu Wei, Kai Bester
Citalopram (CIT) is one of the most consumed antidepressants and frequently detected in aquatic environments worldwide. Conventional wastewater treatment cannot remove this neuronal active pharmaceutical efficiently. Past studies showed that moving bed biofilm reactors (MBBRs) can degrade CIT but the exact transformation pathways and toxicity reduction remained unclear. In this study, the effects of substrate stimulation on CIT transformation in an MBBR were systematically investigated. The results showed that a co-metabolic stimulation by acetate increased the transformation rate by 54 % and 24 % at high (300 μg/L) and environmental concentration (1...
February 3, 2024: Water Research
https://read.qxmd.com/read/38295957/comparison-of-moving-bed-biofilm-reactor-and-bio-contact-oxidation-reactor-start-up-with-heterotrophic-nitrification-aerobic-denitrification-bacteria-and-activated-sludge-inoculation-under-high-ammonia-nitrogen-conditions
#12
JOURNAL ARTICLE
Qian Zhang, Huan Liu, Siyu Liang, Wang Chen, Senwen Tan, Chenxi Yang, Shumin Qin, Kun Long
To overcome poor ammonia tolerance and removal performance of bio-contact oxidation (BCO) reactor inoculated with activated sludge for high-ammonia nitrogen (NH + 4-N) chemical wastewater treatment, this study compared inoculating heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria in moving bed biofilm reactor (MBBR) with activated sludge inoculation in BCO reactor under simulated high NH + 4-N conditions. Results revealed that MBBR achieved faster biofilm formation (20 days vs...
January 29, 2024: Bioresource Technology
https://read.qxmd.com/read/38257587/iot-water-quality-monitoring-and-control-system-in-moving-bed-biofilm-reactor-to-reduce-total-ammonia-nitrogen
#13
JOURNAL ARTICLE
Putu A Suriasni, Ferry Faizal, Wawan Hermawan, Ujang Subhan, Camellia Panatarani, I Made Joni
Traditional aquaculture systems appear challenged by the high levels of total ammoniacal nitrogen (TAN) produced, which can harm aquatic life. As demand for global fish production continues to increase, farmers should adopt recirculating aquaculture systems (RAS) equipped with biofilters to improve the water quality of the culture. The biofilter plays a crucial role in ammonia removal. Therefore, a biofilter such as a moving bed biofilm reactor (MBBR) biofilter is usually used in the RAS to reduce ammonia. However, the disadvantage of biofilter operation is that it requires an automatic system with a water quality monitoring and control system to ensure optimal performance...
January 12, 2024: Sensors
https://read.qxmd.com/read/38237462/a-novel-process-based-on-powder-carriers-demonstrates-robustness-in-nitrogen-and-phosphorus-removal-from-real-municipal-wastewater
#14
JOURNAL ARTICLE
Hong Wang, Haolian Xu, Xiaoguang Liu, Yu Hua, Donghai Yang, Xiaohu Dai
The development of efficient and low-consumption wastewater upgrading process is currently at the forefront of the wastewater treatment field. In this study, a novel wastewater treatment process based on powder carriers was proposed. Three systems, namely the activated sludge (AS) system, powder carrier (PC) system, and moving bed biofilm reactor (MBBR) system, were established and operated for over 140 days to treat real municipal wastewater. The characteristics and differences between the three systems were comprehensively investigated...
January 15, 2024: Water Research
https://read.qxmd.com/read/38113948/iron-modified-carriers-accelerate-biofilm-formation-and-resist-anammox-bacteria-loss-in-biofilm-reactors-for-partial-denitrification-anammox
#15
JOURNAL ARTICLE
Genwang Chang, Jinjin Yang, Xiang Li, Haiqing Liao, Shaokang Li, Junhua Hou, Genmao Zhong, Junjie Wang, Mingtao Deng, Yiheng Xue
The slow formation of anammox biofilms presents a bottleneck for resolving anammox bacterial loss and achieving stable performance in biofilm-based partial denitrification-anammox (PD-A) processes. This study utilized iron-modified (K1/Fe3 O4 NPs) carriers, which were prepared and used for the first time in PD-A processes. Parallel moving bed biofilm reactors (MBBRs) indicated that iron-modified carriers facilitated the formation of biofilms at a faster rate than K1 carriers, consequently improving the nitrogen removal performance of the process by over 40 %...
December 17, 2023: Bioresource Technology
https://read.qxmd.com/read/38072080/achieving-simultaneous-nitrification-and-endogenous-denitrifying-phosphorus-removal-in-anaerobic-intermittently-aerated-moving-bed-biofilm-reactor-for-low-carbon-to-nitrogen-ratio-wastewater-treatment
#16
JOURNAL ARTICLE
Ya-Nan Luan, Yue Yin, Zhonghong Guo, Jiaqi Yang, Guanglei Wang, Feng Zhang, Yihua Xiao, Changqing Liu
In this study, an anaerobic/intermittently-aerated moving bed biofilm reactor (AnIA-MBBR) was proposed to realize simultaneous nitrification and endogenous denitrifying phosphorus removal (SNEDPR) in treating low carbon-to-nitrogen (C/N) ratio wastewater. The effect of different intermittent aeration modes (short and long aeration) on nutrients' removal was investigated. With the C/N ratio around 3, the removal efficiencies of total nitrogen and phosphorus were 90% and 74%, 88% and 59%, respectively, for short aeration and long aeration...
December 8, 2023: Bioresource Technology
https://read.qxmd.com/read/38042072/combination-of-advanced-biological-systems-and-photocatalysis-for-the-treatment-of-real-hospital-wastewater-spiked-with-carbamazepine-a-pilot-scale-study
#17
JOURNAL ARTICLE
Abhradeep Majumder, Philipp Otter, Dominic Röher, Amit Bhatnagar, Nadeem Khalil, Ashok Kumar Gupta, Riccardo Bresciani, Carlos A Arias
Over the past few decades, the increase in dependency on healthcare facilities has led to the generation of large quantities of hospital wastewater (HWW) rich in chemical oxygen demand (COD), total suspended solids (TSS), ammonia, recalcitrant pharmaceutically active compounds (PhACs), and other disease-causing microorganisms. Conventional treatment methods often cannot effectively remove the PhACs present in wastewater. Hence, hybrid processes comprising of biological treatment and advanced oxidation processes have been used recently to treat complex wastewater...
December 1, 2023: Journal of Environmental Management
https://read.qxmd.com/read/38009922/the-microbiome-of-two-strategies-for-ammonia-removal-with-the-sequencing-batch-moving-bed-biofilm-reactor-treating-cheese-production-wastewater
#18
JOURNAL ARTICLE
Alexandra Tsitouras, Nour Al-Ghussain, James Butcher, Alain Stintzi, Robert Delatolla
Cheese production facilities must abide by sewage discharge bylaws that prevent overloading municipal water resource recovery facilities, eutrophication, and toxicity to aquatic life. Compact treatment systems can permit on-site treatment of cheese production wastewater; however, competition between heterotrophs and nitrifiers impedes the implementation of the sequencing batch moving bed biofilm reactor (SB-MBBR) for nitrification from high-carbon wastewaters. This study demonstrates that a single SB-MBBR is not feasible for nitrification when operated with anerobic and aerobic cycling for carbon and phosphorous removal from cheese production wastewater, as nitrification does not occur in a single reactor...
November 27, 2023: Applied and Environmental Microbiology
https://read.qxmd.com/read/37995876/insights-into-biofilm-development-on-polyhydroxyalkanoate-biofilm-carrier-for-anoxic-azo-dye-decolourization-of-acid-orange-7
#19
JOURNAL ARTICLE
Jia Yun Chang, Taufiq Ahmad Syauqi, Kumar Sudesh, Si Ling Ng
Polyhydroxyalkanoates (PHAs) are promising alternatives to non-degradable polymers in various applications. This study explored the use of biologically recovered PHA as a biofilm carrier in a moving bed biofilm reactor for acid orange 7 treatment. The PHA was comprised of 86 ± 1 mol% of 3-hydroxybutyrate and 14 ± 1 mol% of 3-hydroxyhexanoate and was melt-fused at 140 °C into pellets. The net positive surface charge of the PHA biocarrier facilitated attachment of negatively charged activated sludge, promoting biofilm formation...
November 21, 2023: Bioresource Technology
https://read.qxmd.com/read/37956948/sulfamethoxazole-removal-from-wastewater-via-anoxic-oxic-moving-bed-biofilm-reactor-degradation-pathways-and-toxicity-assessment
#20
JOURNAL ARTICLE
Duduku Saidulu, Shivani Agrawal, Amit Bhatnagar, Ashok Kumar Gupta
The effects of sulfamethoxazole (SMZ), an antibiotic commonly detected in the water environment, on the performance of a single staged anoxic/oxic moving bed biofilm reactor (A/O MBBR), was investigated. The anoxic zone played a key role in the removal of SMZ with a percentage of contribution accounting for around 85% in the overall removal. Denitrifying heterotrophic microbes present in the anoxic zone showed relatively more resistance to higher SMZ loads. It was found that in extracellular polymeric substances, protein content was increased consistently with the increase in SMZ concentration...
November 11, 2023: Bioresource Technology
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