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moving bed biofilm reactor

Michele Laureni, David G Weissbrodt, Kris Villez, Orlane Robin, Nadieh de Jonge, Alex Rosenthal, George Wells, Jeppe Lund Nielsen, Eberhard Morgenroth, Adriano Joss
The control of nitrite-oxidizing bacteria (NOB) challenges the implementation of partial nitritation and anammox (PN/A) processes under mainstream conditions. The aim of the present study was to understand how operating conditions impact microbial competition and the control of NOB in hybrid PN/A systems, where biofilm and flocs coexist. A hybrid PN/A moving-bed biofilm reactor (MBBR; also referred to as integrated fixed film activated sludge or IFAS) was operated at 15 °C on aerobically pre-treated municipal wastewater (23 mgNH4-N L-1 )...
January 7, 2019: Water Research
Maria Cristina Collivignarelli, Alessandro Abbà, Giorgio Bertanza
In the last years, the upgrading of wastewater treatment plants (WWTPs) could be required in order to comply with the more stringent regulation requirements. Nevertheless, the main issue is related to the surface availability. A proper solution could be represented by the attached biomass processes, in particular the moving bed biofilm reactors (MBBR), that have a significant footprint reduction with respect to conventional activated sludge (CAS). However, MBBR showed an important disadvantage: the poor aeration energy efficiency due to the use of coarse bubble diffusers, which guarantee high reliability and low maintenance costs with respect to fine bubble ones...
February 18, 2019: Environmental Science and Pollution Research International
Elham Ashrafi, Edris Allahyari, Elena Torresi, Henrik Rasmus Andersen
In this study, two moving-bed biofilm reactors (MBBR1 and MBBR2 ) filled with different size of carrier media (Kaldnes K1 and Kaldnes K1 micro, respectively) were subjected to soluble (sugar and sodium acetate (Ac)) substrate and mixture of soluble and particulate (particulate potato starch (PS)) substrate in a very high organic loading rate (12 kgCOD/m3 ·d) at different temperatures (26 and 15˚C, in MBBR1 and MBBR2 , respectively). The effects of carrier type and substrate on biofilm structure and reactor performance have been studied...
February 8, 2019: Environmental Technology
Elena Torresi, Kai Tang, Jie Deng, Christina Sund, Barth F Smets, Magnus Christensson, Henrik R Andersen
Further biological polishing of micropollutants in WWTP effluents is limited by the lack of available carbon for cometabolic degradation. Metabolism of polyhydroxyalkanoates (PHAs) stored intracellularly during enhanced biological phosphorus removal (EBPR) could serve as carbon source for post-denitrification and micropollutant cometabolism. The removal of nine micropollutants (i.e., pharmaceuticals and corrosion inhibitors) was investigated by using Moving Bed Biofilm Reactors (MBBRs), selecting phosphorus (PAO) or glycogen (GAO) accumulating organisms under different redox conditions...
January 22, 2019: Science of the Total Environment
Sicheng Shao, Yongyou Hu, Jianhua Cheng, Yuancai Chen
In this study, the characteristics of biodegradation of oxytetracycline (OTC) by strain Ochrobactrum sp. KSS10 were studied under various environmental conditions, including initial OTC concentrations, variable temperature, initial pH, and diverse carbon sources. The capability of this bacterial strain for performing simultaneous OTC degradation and nitrate reduction was also explored under aerobic conditions. An OTC degradation ratio of 63.33% and a nitrate removal ratio of 98.64% were obtained within 96 h...
January 17, 2019: Ecotoxicology and Environmental Safety
Khaoula Masmoudi Jabri, Thorsten Fiedler, Assia Saidi, Erwin Nolde, Michael Ogurek, Sven-Uwe Geissen, Latifa Bousselmi
In this study, the Activated Sludge Model No. 3 (ASM3) was applied for the simulation of the removal of organics and nitrogen in a multistage moving bed biofilm reactor (MBBR) used for biological greywater treatment. The data related to the characterization of the greywater were collected over a period of 5 months to be investigated in the model. The reactor showed a high performance for the removal of chemical oxygen demand (COD), dissolved organic carbon (DOC), biological oxygen demand (BOD5 ), ammonia (NH4 -N), and total nitrogen (TN) with a removal efficiency of 93%, 80...
January 5, 2019: Environmental Science and Pollution Research International
Rodrigo Orrego, L Mark Hewitt, Mark McMaster, Gustavo Chiang, Mauricio Quiroz, Kelly Munkittrick, Juan F Gavilán, Ricardo Barra
Bioactive substances in the Biobio River Basin in Chile were examined by deploying Semi Permeable Membrane Devices (SPMDs) upstream and downstream of 4 pulp mill effluent discharges. Androgenic and estrogenic activity of SPMD extracts were then evaluated using in vitro fish sex steroid receptor binding assays. The results indicated the occurrence of estrogenic type compounds associated with one of the mill discharges. A significant correlation among the presence of these compounds, an increase in gonadosomatic index GSI and induction of hepatic EROD activity of two native fish species was observed...
January 3, 2019: Ecotoxicology and Environmental Safety
Dezhao Liu, Changwei Li, Hengbo Guo, Xianwang Kong, Lihua Lan, Hong Xu, Songming Zhu, Zhangying Ye
Mariculture wastewater treatment by nitrification requires a long start-up time due to high salinity stress. This study aimed to verify the faster start-up of a trickling filter (TF) compared to a moving bed bioreactor (MBBR) treating synthetic mariculture wastewater, and to investigate the feasibility of transferring mature biocarriers from the TF to a new MBBR (TF-MBBR). The nitrogen removal performance, biofilm physicochemical properties and microbial communities were investigated. The results obtained showed that, the TF started up 41 days faster than the MBBR, despite the richer microbial diversity in the latter...
November 26, 2018: Chemosphere
Katrin Doederer, Deb Gale, Jurg Keller
Biodegradation is an effective method for the removal of taste and odour (T&O) compounds from drinking water sources. In this study, the applicability of a moving-bed biofilm reactor (MBBR) as biological treatment step for the control of MIB and geosmin was studied at pilot-scale. After a 3.5 month acclimation period both T&O compounds could be reliably removed by at least 80%. Biodegradation was found to be the dominant removal mechanism with air stripping contributing up to 25% at shorter HRTs. Also sorption of MIB and geosmin onto carriers and biofilm did occur, simultaneously facilitating the biodegradation process...
November 16, 2018: Water Research
Jessa Marie J Millanar-Marfa, Laura Borea, Mark Daniel G de Luna, Florencio C Ballesteros, Vincenzo Belgiorno, Vincenzo Naddeo
High operational cost due to membrane fouling propensity remains a major drawback for the widespread application of membrane bioreactor (MBR) technology. As a result, studies on membrane fouling mitigation through the application of integrated processes have been widely explored. In this work, the combined application of electrochemical processes and moving bed biofilm reactor (MBBR) technology within an MBR at laboratory scale was performed by applying an intermittent voltage of 3 V/cm to a reactor filled with 30% carriers...
November 22, 2018: Membranes
Medini K Annavajhala, Vikram Kapoor, Jorge Santo-Domingo, Kartik Chandran
Conventional biological nitrogen removal (BNR), comprised of nitrification and denitrification, is traditionally employed in wastewater treatment plants (WWTPs) to prevent eutrophication in receiving water bodies. More recently, the combination of selective ammonia to nitrite oxidation (nitritation) and autotrophic anaerobic ammonia oxidation (anammox), collectively termed deammonification, has also emerged as a possible energy- and cost-effective BNR alternative. Herein, we analyzed microbial diversity and functional potential within 13 BNR processes in the United States, Denmark, and Singapore operated with varying reactor configuration, design, and operational parameters...
2018: Frontiers in Microbiology
Sahar Irankhah, Ahya Abdi Ali, Mohammad Reza Soudi, Sara Gharavi, Bita Ayati
In this study, the efficiency improvement of three moving bed biofilm reactors (MBBRs) was investigated by inoculation of activated sludge cells (R1), mixed culture of eight strong phenol-degrading bacteria consisted of Pseudomonas spp. and Acinetobacter spp. (R2) and the combination of both (R3). Biofilm formation ability of eight bacteria was assessed initially using different methods and media. Maximum degradation of phenol, COD, biomass growth and also changes in organic loading shock were used as parameters to measure the performance of reactors...
October 28, 2018: World Journal of Microbiology & Biotechnology
Zi Song, Xinbo Zhang, Huu Hao Ngo, Wenshan Guo, Pengfei Song, Yongchao Zhang, Haitao Wen, Jianbo Guo
This study aims to enhance nitrogen removal efficiency of a moving bed biofilm reactor (MBBR) by developing a new MBBR with zeolite powder-based polyurethane sponges as biocarriers (Z-MBBR). Results indicated the total nitrogen (TN) removal efficiency and simultaneous nitrification and denitrification (SND) performance in Z-MBBR were nearly 10% higher than those in the conventional MBBR with sponges as biocarriers (S-MBBR). About 84.2 ± 4.8% of TN was removed in Z-MBBR compared to 75.1 ± 6.8% in S-MBBR...
February 15, 2019: Science of the Total Environment
Pawel Krzeminski, Maria Concetta Tomei, Popi Karaolia, Alette Langenhoff, C Marisa R Almeida, Ewa Felis, Fanny Gritten, Henrik Rasmus Andersen, Telma Fernandes, Celia M Manaia, Luigi Rizzo, Despo Fatta-Kassinos
Contaminants of emerging concern (CEC) discharged in effluents of wastewater treatment plants (WWTPs), not specifically designed for their removal, pose serious hazards to human health and ecosystems. Their impact is of particular relevance to wastewater disposal and re-use in agricultural settings due to CEC uptake and accumulation in food crops and consequent diffusion into the food-chain. This is the reason why the chemical CEC discussed in this review have been selected considering, besides recalcitrance, frequency of detection and entity of potential hazards, their relevance for crop uptake...
January 15, 2019: Science of the Total Environment
S Mehran Abtahi, Maike Petermann, Agathe Juppeau Flambard, Sandra Beaufort, Fanny Terrisse, Thierry Trotouin, Claire Joannis Cassan, Claire Albasi
The performance of tertiary moving bed biofilm reactors (MBBRs) was evaluated in terms of micropollutants (MPs) removal from secondary-treated municipal wastewater. After stepwise establishment of a mature biofilm, monitored by scanning electron and confocal microscopies, abiotic and biotic removals of MPs were deeply studied. Since no MPs reduction was observed by the both photodegradation and volatilization, abiotic removal of MPs was ascribed to the sorption onto the biomass. Target MPs i.e. Naproxen, Diclofenac, 17β-Estradiol and 4n-Nonylphenol, arranged in the ascending order of hydrophobicity, abiotically declined up to 2...
December 1, 2018: Science of the Total Environment
Sanaz Alizadeh, Subhasis Ghoshal, Yves Comeau
Municipal water resource recovery facilities are the primary recipients of a significant fraction of discharged silver nanoparticle (AgNP)-containing wastes, yet the fate and potential risks of AgNPs in attached-growth biological wastewater treatment processes are poorly understood. The fate and inhibitory effects of polyvinylpyrrolidone (PVP)-coated AgNPs at environmentally-relevant nominal concentrations (10, 100, 600 μg/L) were investigated, for the first time, in high rate moving bed biofilm reactors (MBBRs) for soluble organic matter removal...
January 10, 2019: Science of the Total Environment
Xuna Liu, Ling Wang, Lina Pang
A novel bacterium Corynebacterium pollutisoli SPH6 was added in A/O-MBBR system to explore its potential in nitrogen removal. Sodium acetate was found to be its favorable carbon sources compared to glucose, sucrose and methanol. Response surface methodology analysis revealed that SPH6 has the maximum specific degradation rate of total nitrogen (4.9302 mg N/(mg·cells·h-1 )) with the temperature of 30.5 °C, pH of 7.97, inoculation ratio of 7.73% and the ratio of chemical oxygen demand and total nitrogen (COD/TN) of 7...
December 2018: Bioresource Technology
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...
November 1, 2018: Water Research
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
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...
October 2018: Bioprocess and Biosystems Engineering
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