keyword
MENU ▼
Read by QxMD icon Read
search

moving bed biofilm reactor

keyword
https://www.readbyqxmd.com/read/30014981/refinery-and-concentration-of-nutrients-from-urine-with-electrodialysis-enabled-by-upstream-precipitation-and-nitrification
#1
Jolien De Paepe, Ralph E F Lindeboom, Marjolein Vanoppen, Kim De Paepe, Dries Demey, Wout Coessens, Brigitte Lamaze, Arne R D Verliefde, Peter Clauwaert, Siegfried E Vlaeminck
Human urine is a valuable resource for nutrient recovery, given its high levels of nitrogen, phosphorus and potassium, but the compositional complexity of urine presents a challenge for an energy-efficient concentration and refinery of nutrients. In this study, a pilot installation combining precipitation, nitrification and electrodialysis (ED), designed for one person equivalent (1.2 Lurine d-1 ), was continuously operated for ∼7 months. First, NaOH addition yielded calcium and magnesium precipitation, preventing scaling in ED...
July 7, 2018: Water Research
https://www.readbyqxmd.com/read/29990762/influence-of-carrier-media-physical-properties-on-start-up-of-moving-attached-growth-systems
#2
Joana Dias, Mel Bellingham, Junaid Hassan, Mark Barrett, Tom Stephenson, Ana Soares
Five carrier media with different shapes (spherical and cylindrical), sizes, voidage and protected surface areas (112-610 m2 /m3 ) were studied in a pilot scale moving bed biofilm reactor (MBBR). This study aimed at assessing start-up duration using biofilm formation rates. Results indicated that the spherical media required shorter periods to achieve stable biofilm formation rates associated with chemical oxygen demand (COD) (15-17 days), compared to cylindrical high surface area media (23-24 days). Protected surface area presented weaker correlations with the biofilm formation rate for COD (R2  = 0...
October 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29980867/investigation-of-copper-inhibition-of-nitrifying-moving-bed-biofilm-mbbr-reactors-during-long-term-operations
#3
Alexander Schopf, Robert Delatolla, Rochelle Mathew, Alexandra Tsitouras, Kathlyn M Kirkwood
Copper, a prevalent heavy metal in industrial mining wastewaters, has been shown to inhibit nitrification in wastewater treatment systems. Biofilm treatment systems have an inherent potential to reduce inhibition. This study investigated the effects of copper concentration on nitrifying biofilms in moving bed biofilm reactor (MBBR) systems across long term operation using influent ammonia concentrations representative of gold mining wastewater. Conventional isotherm models did not adequately model the attachment of copper to the biofilm...
July 6, 2018: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/29965526/-optimization-of-the-nitrogen-removal-performance-on-the-canon-process-in-a-biofilm-reactor-from-fbbr-to-mbbr
#4
Kun-Ming Fu, Hui Li, Hou-Tian Zhou, Fu-Guo Qiu
To optimize the performance of completely autotrophic nitrogen removal over nitrite (CANON), a CANON process with modified polyethylene as carriers was operated in a moving-bed biofilm reactor (MBBR), using synthetic inorganic ammonia-rich wastewater (NH4 + -N about 400 mg ·L-1 ) as influent at 30℃±1℃. With an HRT of 6 h, pH at 7.8, and filling rate of 35%, the average removal rate of NH4 + -N and TN reached 74.28% and 87.93%, respectively, and the highest removals reached 84.68% and 98.82%, respectively, while the value of ΔNO3 - /ΔTN was 0...
May 8, 2018: Huan Jing Ke Xue= Huanjing Kexue
https://www.readbyqxmd.com/read/29958700/membrane-bioreactors-and-electrochemical-processes-for-treatment-of-wastewaters-containing-heavy-metal-ions-organics-micropollutants-and-dyes-recent-developments
#5
Adewale Giwa, Abdallah Dindi, Joanna Kujawa
Research and development activities on standalone systems of membrane bioreactors and electrochemical reactors for wastewater treatment have been intensified recently. However, several challenges are still being faced during the operation of these reactors. The current challenges associated with the operation of standalone MBR and electrochemical reactors include: membrane fouling in MBR, set-backs from operational errors and conditions, energy consumption in electrochemical systems, high cost requirement, and the need for simplified models...
June 12, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29864733/cell-membrane-characteristics-and-microbial-population-distribution-of-mbbr-and-ifas-with-different-dissolved-oxygen-concentration
#6
Si-Jia Ma, Li-Li Ding, Hai-Dong Hu, Hai-Jun Ma, Ke Xu, Hui Huang, Jin-Ju Geng, Hong-Qiang Ren
This paper investigated the influences of different dissolved oxygen (DO) concentration (0.71-1.32, 2.13-3.02 and 4.31-5.16 mg/L) on cell membrane characteristics and microbial population distribution of moving biofilm reactors. Two representative reactors, i.e., moving bed biofilm reactors and integrated fixed-film activated sludge were operated. Results indicated that both DO concentration of 0.71-1.32 mg/L and 4.31-5.16 mg/L could increase membrane lipid mobile fraction (49.4%-67.4%) of the microbes, however, through prompting the synthesis of branched fatty acids and unsaturated fatty acids, respectively...
October 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29752018/the-microbial-community-in-a-moving-bed-biotrickling-filter-operated-to-remove-hydrogen-sulfide-from-gas-streams
#7
Cesira Giordano, Francesco Spennati, Gualtiero Mori, Giulio Munz, Claudia Vannini
The information available on the microbial communities responsible for pollutant degradation is increasingly accessible. Its use to optimize process design and operation is an important challenge in the field of effluent treatment research. Therefore, a prototype of a moving bed biotrickling filter (MBBTF) reactor was designed and, for the first time, operated at full-scale for the removal of sulfides desorbing from tannery industrial wastewater. The bacterial community operating in this innovative reactor was studied, and its composition and response to different operating conditions were characterized...
July 2018: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29698916/microbial-community-composition-of-a-multi-stage-moving-bed-biofilm-reactor-and-its-interaction-with-kinetic-model-parameters-estimation
#8
Xiaodong Wang, Xuejun Bi, Lars John Hem, Harsha Ratnaweera
Microbial community diversity determines the function of each chamber of multi-stage moving bed biofilm reactor (MBBR) systems. How the microbial community data can be further used to serve wastewater treatment process modelling and optimization has been rarely studied. In this study, a MBBR system was set up to investigate the microbial community diversity of biofilm in each functional chamber. The compositions of microbial community of biofilm from different chambers of MBBR were quantified by high-throughput sequencing...
July 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29684889/combination-of-a-recombinant-bacterium-with-organonitrile-degrading-and-biofilm-forming-capability-and-a-positively-charged-carrier-for-organonitriles-removal
#9
Chunyan Li, Yueling Sun, Zhenlei Yue, Mingyan Huang, Jinming Wang, Xi Chen, Xuejiao An, Hailian Zang, Dapeng Li, Ning Hou
The immobilization of organonitrile-degrading bacteria via the addition of biofilm-forming bacteria represents a promising technology for the treatment of organonitrile-containing wastewater, but biofilm-forming bacteria simply mixed with degrading bacteria may reduce the biodegradation efficiency. Nitrile hydratase and amidase genes, which play critical roles in organonitriles degradation, were cloned and transformed into the biofilm-forming bacterium Bacillus subtilis N4 to construct a recombinant bacterium B...
April 10, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29621702/biodegradation-of-bilge-water-batch-test-under-anaerobic-and-aerobic-conditions-and-performance-of-three-pilot-aerobic-moving-bed-biofilm-reactors-mbbrs-at-different-%C3%AF-lling-fractions
#10
Ioannis Vyrides, Efi-Maria Drakou, Stavros Ioannou, Fotoula Michael, Georgia Gatidou, Athanasios S Stasinakis
The bilge water that is stored at the bottom of the ships is saline and greasy wastewater with a high Chemical Oxygen Demand (COD) fluctuations (2-12 g COD L-1 ). The aim of this study was to examine at a laboratory scale the biodegradation of bilge water using first anaerobic granular sludge followed by aerobic microbial consortium (consisted of 5 strains) and vice versa and then based on this to implement a pilot scale study. Batch results showed that granular sludge and aerobic consortium can remove up to 28% of COD in 13 days and 65% of COD removal in 4 days, respectively...
July 1, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29558269/assessment-of-uasb-dhs-technology-for-sewage-treatment-a-comparative-study-from-a-sustainability-perspective
#11
Namita Maharjan, Naoki Nomoto, Tadashi Tagawa, Tsutomu Okubo, Shigeki Uemura, Nadeem Khalil, Masashi Hatamoto, Takashi Yamaguchi, Hideki Harada
This paper assesses the technical and economic sustainability of a combined system of an up-flow anaerobic sludge blanket (UASB)-down-flow hanging sponge (DHS) for sewage treatment. Additionally, this study compares UASB-DHS with current technologies in India like trickling filters (TF), sequencing batch reactor (SBR), moving bed biofilm reactor (MBBR), and other combinations of UASB with post-treatment systems such as final polishing ponds (FPU) and extended aeration sludge process (EASP). The sustainability of the sewage treatment plants (STPs) was evaluated using a composite indicator, which incorporated environmental, societal, and economic dimensions...
April 6, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29554513/mainstream-anammox-in-a-novel-a-2b-process-for-energy-efficient-municipal-wastewater-treatment-with-minimized-sludge-production
#12
Jun Gu, Qin Yang, Yu Liu
The conventional biological processes for municipal wastewater are facing the challenges of high energy consumption and production of excessive sludge. To address these two emerging issues, this study demonstrated the feasibility to integrate mainstream anammox into an A-2B process for municipal wastewater treatment towards energy-efficient operation with reduced sludge production. In the proposed A-2B process, an anaerobic fixed bed reactor (AFBR) served as A-stage for COD capture, an anammox moving bed biofilm reactor (MBBR) was employed as B2-stage, which received effluent containing nitrite from a sequencing batch reactor (SBR) at B1-stage...
July 1, 2018: Water Research
https://www.readbyqxmd.com/read/29518654/phenol-removal-performance-and-microbial-community-shift-during-ph-shock-in-a-moving-bed-biofilm-reactor-mbbr
#13
Hao Zhou, Guochen Wang, Minghuo Wu, Weiping Xu, Xuwang Zhang, Lifen Liu
A moving bed biofilm reactor (MBBR) effectively removes pollutants and even runs under extreme conditions. However, the pH shock resistance of a biofilm in MBBRs has been rarely reported. In this study, simulated phenol wastewater with acidic shock (pH 7.5-3.0) was used. In the pH shock phase, the phenol and COD removal efficiencies initially decreased and gradually increased to more than 90%. Microscopic studies showed that the superficial biofilm was mainly composed of fungi (yeasts) in the acidic pH shock phase...
June 5, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29501885/start-up-and-long-term-performance-of-anammox-moving-bed-biofilm-reactor-seeded-with-granular-biomass
#14
Maciej S Kowalski, Tanner R Devlin, Jan A Oleszkiewicz
Availability of granular anammox sludge is much higher than biofilm seed carriers and the sludge is easier to transport. This paper describes and investigates a formation of mature anammox biofilm originated from granular sludge and proves that an anammox moving bed biofilm reactors (MBBR) can be easily and quickly started-up by seeding with granular sludge. The reactor was fed with synthetic wastewater containing ammonium and nitrite. Successful start-up was completed in as little as 50 days when TN removal increased to more than 80%...
June 2018: Chemosphere
https://www.readbyqxmd.com/read/29488972/microbial-characteristics-of-landfill-leachate-disposed-by-aerobic-moving-bed-biofilm-reactor
#15
Guangzhi Wang, Rui Chen, Likun Huang, Hemeng Ma, Deying Mu, Qingliang Zhao
An aerobic moving bed biofilm reactor (MBBR) was applied to treat landfill leachate generated from a domestic waste incineration plant. Pollutant removal efficiency of this reactor under stable operating condition was studied. The biomass, bacteria species, and microbial metabolism in this reactor were investigated. These results showed that the average removal efficiency of chemical oxygen demand (COD) and ammonia nitrogen in the aerobic MBBR achieved 64% and 97% in the optimum conditions, respectively. The three-dimensional fluorescence spectrum revealed that the content of soluble microbial byproducts from extracellular polymeric substances extraction in suspended sludge was much higher than that on biofilm, and the types of pollutants were various in different regions of the reactor...
February 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29488966/application-of-a-moving-bed-biofilm-reactor-for-sulfur-oxidizing-autotrophic-denitrification
#16
Yan-Xiang Cui, Di Wu, Hamish R Mackey, Ho-Kwong Chui, Guang-Hao Chen
Sulfur-oxidizing autotrophic denitrification (SO-AD) was investigated in a laboratory-scale moving-bed biofilm reactor (MBBR) at a sewage temperature of 22 °C. A synthetic wastewater with nitrate, sulfide and thiosulfate was fed into the MBBR. After 20 days' acclimation, the reduced sulfur compounds were completely oxidized and nitrogen removal efficiency achieved up to 82%. The operation proceeded to examine the denitrification by decreasing hydraulic retention time (HRT) from 12 to 4 h in stages. At steady state, this laboratory-scale SO-AD MBBR achieved the nitrogen removal efficiency of 94% at the volumetric loading rate of 0...
February 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29477120/biodegradation-of-atrazine-from-wastewater-using-moving-bed-biofilm-reactor-under-nitrate-reducing-conditions-a-kinetic-study
#17
Zahra Derakhshan, Mohammad Hassan Ehrampoush, Amir Hossein Mahvi, Mohammad Taghi Ghaneian, Seyed Mohammad Mazloomi, Mohammad Faramarzian, Mansooreh Dehghani, Hossein Fallahzadeh, Saeed Yousefinejad, Enayat Berizi, Shima Bahrami
In this study employed an anoxic moving bed biofilm reactor (AnMBBR) to evaluate the effects of hydraulic and toxic shocks on performance reactor. The results indicated a relatively good resistance of system against exercised shocks and its ability to return to steady-state conditions. In optimal conditions when there was the maximum rate of atrazine and soluble chemical oxygen demand (COD) removal were 74.82% and 99.29% respectively. Also, atrazine biodegradation rapidly declines in AnMBBR from 74% ± 0...
April 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29469652/effects-of-the-ammonium-loading-rate-on-nitrite-oxidizing-activity-during-nitrification-at-a-high-dose-of-inorganic-carbon
#18
Minkyu Choi, Kyungjin Cho, Dawoon Jeong, Yun-Chul Chung, Joonhong Park, Seockheon Lee, Hyokwan Bae
In this study, the effects of the ammonium loading rate (ALR) and inorganic carbon loading rate (ILR) on the nitrification performance and composition of a nitrifying bacterial community were investigated in a moving bed biofilm reactor, using poly(vinyl alcohol) (PVA) sponge cubes as a supporting carrier. Between the two ALRs of 0.36 and 2.16 kg-N m-1 d-1 , stable partial nitritation was achieved at the higher ALR. Inorganic carbon was dosed at high levels: 33.1, 22.0, 16.4, 11.0, and 5.4 times the theoretical amount...
July 3, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29459646/poly-butylene-succinate-bamboo-powder-blends-as-solid-phase-carbon-source-and-biofilm-carrier-for-denitrifying-biofilters-treating-wastewater-from-recirculating-aquaculture-system
#19
Dezhao Liu, Jiawei Li, Changwei Li, Yale Deng, Zeqing Zhang, Zhangying Ye, Songming Zhu
In this study, Poly(butylene succinate)/bamboo powder (PBS/BP) was newly applied and tested for 8 months as the carbon source in two moving bed reactors for nitrate removal in real RAS wastewater (fresh/sea water), with the purposes of simultaneous reducing the cost of PBS packing and effluent DOC. Fast start-ups were obtained in both reactors, in which high denitrification rates were observed (0.68 ± 0.03 and 0.83 ± 0.11 kg [Formula: see text]-N m-3 d-1 for fresh and sea water, respectively) with no nitrite and low ammonia accumulation...
February 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29454626/effect-of-adding-low-concentration-of-rhamnolipid-on-reactor-performances-and-microbial-community-evolution-in-mbbrs-for-low-c-n-ratio-and-antibiotic-wastewater-treatment
#20
Pengcheng Peng, Hui Huang, Hongqiang Ren
This study aims to explore the potential of low-concentration of rhamnolipid in efficient treatment of wastewater with poor biodegradability. Six lab-scale moving bed biofilm reactors (MBBRs) were applied to investigate the effect of rhamnolipid concentration (0, 20, 50 mg/L) on pollutants removal, biomass accumulation, microbial morphology and community evolution in synthetic low C/N ratio (3:1) and antibiotic (50 μg/L tetracycline) wastewater. 20 mg/L rhamnolipid treated groups exhibited significant increase (p < 0...
May 2018: Bioresource Technology
keyword
keyword
163407
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"