Article
Engineering, Environmental
Vojtech Kouba, Kamila Hurkova, Klara Navratilova, Dana Kok, Andrea Benakova, Michele Laureni, Patricie Vodickova, Tomas Podzimek, Petra Lipovova, Laura van Niftrik, Jana Hajslova, Mark C. M. van Loosdrecht, David Gregory Weissbrodt, Jan Bartacek
Summary: In the study of the performance of anammox reactions under low-temperature conditions, membrane composition and cultivation temperature were found to be closely related to the activity of anammox biomasses. The adaptation of mesophilic cultures to low-temperature conditions may take several months or even up to 5 years. An interesting finding in these studies is that biomass enriched in the marine genus Candidatus Scalindua showed outstanding potential for nitrogen removal from cold streams.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
D. Sobotka, J. Zhai, J. Makinia
Summary: This study investigated the temperature dependence of anammox process kinetics, proposing a new generalized temperature model (GTE) to enhance predictions of SAA. The GTE showed strong correlation between measured and predicted data at various temperature ranges, improving understanding of anammox processes at different temperatures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Linh-Thy Le, Joeun Jeon, Bao-Trong Dang, Xuan-Thanh Bui, Deokjin Jahng
Summary: This study investigated the activity and specific activity of anaerobic ammonium-oxidizing bacteria, revealing that temperature is a key parameter influencing the anammox reaction. The activity and nitrogen removal efficiency decrease with lower temperatures but can recover when temperatures increase again.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Agricultural Engineering
Daehee Choi, Chaeyoung Jung, Jinyoung Jung
Summary: The preservation efficiency of mainstream (M-ANA) and sidestream anaerobic ammonium oxidation (anammox) (S-ANA) was evaluated based on their activation energy (E-a). The low E-a of M-ANA contributed to enhancing its viability during preservation and the addition of hydrazine was highly beneficial. Although the specific nitrogen removal rate of the M-SNA seed sludge was lower, it became higher after reactivation.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Chao Pan, Dongdong Xu, Ziyang Dong, Wenji Li, Da Kang, Wenda Chen, Yiyu Li, Meng Zhang, Baolan Hu, Ping Zheng
Summary: This study investigated the effects of different cooling modes on the properties of anammox granular sludge, finding that temperature decrease can improve its physical preservability and impact the preservation rate of functional bacteria. The findings, especially the induction of dormancy in AnAOB, contribute to understanding the effect of temperature decrease on AnGS and promoting the development of preservation technology for AnGS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Hafiz Adeel Ahmad, Shakeel Ahmad, Linjie Gao, Zhibin Wang, Amro El-Baz, Shou-Qing Ni
Summary: Sustainable development goal 6 focuses on efficient management of water resources, wastewater treatment, and reuse of treated wastewater. Anammox and partial nitrification (PN-anammox) has been a successful side-stream wastewater treatment process, but the involvement of other nitrogen cycle bacteria is needed. Coupling anammox with PD, DAMO, and DNRA can reduce organic matter use, greenhouse gas release, and energy consumption. This review comprehensively discusses the importance and application perspective of anammox with diverse nitrate-reducing bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
V Kouba, D. Vejmelkova, E. Zwolsman, K. Hurkova, K. Navratilova, M. Laureni, P. Vodickova, T. Podzimek, J. Hajslova, M. Pabst, M. C. M. van Loosdrecht, J. Bartacek, P. Lipovova, D. G. Weissbrodt
Summary: This study compares the effect of gradual temperature decrease and cold shocks on the metabolic activity of anammox bacteria. The results show that cold shocks can significantly increase the activity of anammox bacteria and maintain the relative content of nitrogen respiration proteins. Cold shocks also induce the more efficient expression of potential cold shock proteins and contribute to the adaptation of anammox bacteria to low temperatures through changes in membrane lipid structure.
Article
Engineering, Environmental
Chao Rong, Zibin Luo, Tianjie Wang, Yu Qin, Jiang Wu, Yan Guo, Yisong Hu, Zhe Kong, Taira Hanaoka, Shinichi Sakemi, Masami Ito, Shigeki Kobayashi, Masumi Kobayashi, Yu-You Li
Summary: Partial nitritation-anammox (PN/A) is a promising energy-neutral wastewater treatment process. However, the mainstream application of PN/A still faces challenges of low nitrogen concentration and low temperatures. In this study, a pilot-scale one-stage PN/A with an integrated fixed-film activated sludge (IFAS) configuration was successfully operated to treat real municipal wastewater. The results demonstrate the strong feasibility of PN/A as a mainstream nitrogen removal process in temperate climates.
Article
Environmental Sciences
Jason A. Leach, Bethany T. Neilson, Caleb A. Buahin, R. Dan Moore, Hjalmar Laudon
Summary: Empirical studies have shown that lakes have a significant impact on stream temperature at landscape scales, even with a small fraction of the catchment area represented by lakes. Lake outlet temperatures in summer and autumn were higher compared to hillslope lateral inflow temperatures. The influence of lakes on downstream temperature was greatest during periods of high lake outflow and persisted for at least 1.4 km downstream.
WATER RESOURCES RESEARCH
(2021)
Article
Agricultural Engineering
Wenyu Li, Yongzhen Peng, Ruitao Gao, Qiong Zhang, Xiyao Li, Chengkun Kao, Jianwei Li
Summary: This study investigates the impact of low salinity levels on a double-anammox system in treating municipal wastewater, finding that a salinity of 1.0% led to a nitrogen removal efficiency of 81.2%, with a significant contribution of 76.5% from anammox. Low salinity was also found to promote nitritation and denitratation, enhancing the overall nitrogen removal efficiency. The enrichment of specific microbial populations, such as Ca. Brocadia and Nitrosomonas, further supported the effectiveness of the double-anammox process in treating saline wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
J. Eli Asarian, Crystal Robinson, Laurel Genzoli
Summary: Low streamflows can increase vulnerability to warming, impacting coldwater fish. Water managers need tools to quantify these impacts and predict future water temperatures. Contrary to most statistical models' assumptions, many seasonally changing factors (e.g., water sources and solar radiation) cause relationships between flow and water temperature to vary throughout the year.
WATER RESOURCES RESEARCH
(2023)
Article
Agricultural Engineering
Lingjie Liu, Fen Wang, Sihan Xu, Zhao Yan, Min Ji
Summary: The study found that introducing fulvic acid at 15 degrees Celsius can improve the total inorganic nitrogen removal efficiency and the expression level of related functional genes in the anammox system. Fulvic acid can also enhance the complexity and interactive relationship of microbial communities, as well as stimulate the relative abundance of key genes in the tricarboxylic acid cycle.
BIORESOURCE TECHNOLOGY
(2022)
Article
Materials Science, Composites
Yi He, Weiguo Li, Mengqing Yang, Pan Dong, Yanli Ma, Jiabin Yang
Summary: This study analyzed the effect of temperature and external force on the plastic collapse of metal foams, proposed energy density and models for the plastic collapse at different temperatures. The models are accurate and practical, enabling rapid prediction of energy absorption and plastic collapse strength of metal foams at different temperatures.
COMPOSITES COMMUNICATIONS
(2022)
Article
Environmental Sciences
XiaoTong Wang, Hong Yang, Yang Su, XuYan Liu
Summary: The study evaluated the effects of immobilized carrier and temperature changes on nitrogen removal, finding that crushed and encapsulated AnGS showed higher nitrogen removal rates but lower tolerance to Fe2+ and Cu2+. Immobilization reduced the activation energy of anammox and enabled efficient nitrogen removal through temperature-HRT adjustments. High-throughput sequencing analysis revealed shifts in community structure with temperature changes, impacting the dominance of anammox functional bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Hong Wang, Hong Chen, Long Chen, Yongdong Chen, Zixuan Liang, Enzhe Yang, Donghai Yang, Xiaohu Dai
Summary: This study investigated the effect of temperature reduction on the partial nitritation-anammox (PN/A) process. The results showed that temperature reduction influenced the expression of functional genes for anammox reaction and enhanced the biofilm formation and diversity of nitrogen removal pathways.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Lenno van den Berg, Mario Pronk, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study compared four methods to measure the density of granular sludge in a full-scale plant treating domestic sewage, and assessed the effect of salinity on granule density. Most methods yielded reliable results, as long as the effect of salinity was considered.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xiaodi Hao, Daoqi Wu, Ji Li, Ranbin Liu, Mark Van Loosdrecht
Summary: Entropy and negentropy are important concepts for ecological balance. Conventional wastewater treatment contributes to entropy production, therefore sustainable methods should be developed to minimize entropy and accelerate negentropy. Resource and energy recovery are crucial in this process.
Article
Engineering, Environmental
Roos Goedhart, Simon Muller, Mark C. M. van Loosdrecht, Doris van Halem
Summary: The addition of phosphate to groundwater can recover anaerobic iron(II) as valuable vivianite. Increasing the pH can enhance the precipitation of vivianite, resulting in higher iron removal efficiency. Therefore, anaerobic iron removal is a promising and sustainable approach for groundwater treatment.
Article
Engineering, Environmental
W. K. Wijdeveld, T. Prot, G. Sudintas, P. Kuntke, L. Korving, M. C. M. van Loosdrecht
Summary: Phosphorus is a crucial resource for food production and chemical industry, and its sustainable use requires recycling from secondary sources. Recovering phosphorus from sewage sludge, particularly vivianite, can be achieved at wastewater treatment plants. By increasing iron dosing, the vivianite content and phosphorus recovery can be maximized, meeting German legislation requirements.
Article
Multidisciplinary Sciences
Karel Olavarria, Yared O. Pijman, Ricardo Cabrera, Mark C. M. van Loosdrecht, S. Aljoscha Wahl
Summary: The cofactor preference of the acetoacetyl-CoA reductase encoded by the phaB1 gene from Cupriavidus necator was studied in relation to PHB accumulation.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Ji Li, Xiaodi Hao, Wei Gan, Mark C. M. van Loosdrecht, Yuanyuan Wu
Summary: This study investigates the key factors and mechanisms controlling ALE formation in flocculent sludge. The experiments reveal that starch-rich influent substrate and low temperature promote ALE production in the sludge. The C/N ratio also affects ALE yield to some extent. Furthermore, the ALE extracted from flocculent sludge has the potential to substitute for commercial alginates, but its composition and chemical properties are influenced by different working conditions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Laurence Strubbe, Edward J. H. van Dijk, Pascalle J. M. Deenekamp, Mark C. M. van Loosdrecht, Eveline I. P. Volcke
Summary: In the pursuit of reducing carbon footprint and energy costs, energy efficiency is crucial. This study focused on aerobic granular sludge reactors and found that they consume up to 50% less energy compared to conventional activated sludge systems. The study also investigated the dynamic behavior of the alpha factor and identified exchange ratio and temperature as the main influencing factors on its rate of increase during the aeration phase.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Seyma Cingoz, Mustafa Yoruk, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: Achieving a neutral/positive energy balance without compromising discharge standards is a key goal in wastewater treatment plants. This study explores the coupling of high-rate activated sludge (HRAS) process with aerobic granular sludge (AGS) process as an energy-efficient pre-treatment option. The results show that feeding the AGS process with a mixture of HRAS process effluent and raw municipal wastewater can increase energy recovery potential and maintain high effluent quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biotechnology & Applied Microbiology
C. Polizzi, T. Lotti, A. Ricoveri, G. Mori, D. Gabriel, G. Munz
Summary: The potential inhibitory effect of biologically pre-treated vegetable tannery wastewater (TW) on anammox granular biomass was studied. The high salinity and tannins concentration in vegetable TW were found to be the main inhibitory factors. Salinity at a conductivity of 10 mS/cm had the greatest impact on the specific anammox activity. The results suggest that there are no technical limitations for using the anammox process for vegetable TW, but preliminary biomass acclimation and regular activity monitoring are recommended for long-term applications.
Article
Construction & Building Technology
Amir Tabakovic, Jeremy Lemmens, Jelmer Tamis, Dave van Vliet, Sayeda Nahar, Willem Suitela, Mark van Loosdrecht, Greet Leegwater
Summary: Bitumen is essential in asphalt pavements for its binding properties and ability to restore damage caused by traffic loading. With the decline in crude oil production, there is a need to find environmentally sustainable alternatives for bitumen modifiers. This paper investigates the potential use of the bio-based co-polymer PHBV as an alternative bitumen modifier and presents positive results from various tests.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Environmental
Navid Ahmadi, Mona Abbasi, Ali Torabian, Mark C. M. van Loosdrecht, Joel Ducoste
Summary: The transformation of four pharmaceuticals in a moving bed biofilm reactor was investigated under different COD/N ratios. Changes in the COD/N ratio influenced the competition between heterotrophic and nitrifying communities, resulting in shifts in microbial populations and composition in the biofilms. Autotrophic conditions exhibited higher transformation rates, indicating the importance of nitrification.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Nam Kyeun Kim, Debes Bhattacharyya, Mark van Loosdrecht, Yuemei Lin
Summary: This research developed a bio-based flame retardant using a biopolymer derived from wastewater sludge to enhance the fire performance of polypropylene (PP). The study found that the extracellular polymeric substances (EPS) from wastewater sludge played a significant role in improving the char formation of PP composite. The incorporation of the bio-based flame retardant restricted the vertical burning characteristics of PP and improved its tensile moduli.
Article
Engineering, Environmental
Lenno van den Berg, Sara Toja Ortega, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study investigated the diffusion of different molecular weight substrates within aerobic granular sludge, and found that the diffusion coefficients within the granules were not significantly different from those in water for substrates with molecular weights up to 4000 Da. The structure of the granules was characterized as having large macropores and semi-solid regions, with different degrees of obstruction to diffusion. Furthermore, the majority of the influent soluble COD was found to be lighter than 1 kDa, indicating that it can be considered as diffusible COD.
Article
Engineering, Environmental
Quan H. Le, Peter J. T. Verheijen, Mark C. M. van Loosdrecht, Eveline I. P. Volcke
Summary: This study focuses on the application of data reconciliation to dynamic wastewater treatment processes. The researchers studied the SHARON partial nitritation process and found that splitting the long-term dynamic data into subsets corresponding to different pseudo-steady-state operations improved the detection of gross errors and allowed for a higher number of variables to be reconciled. They also discovered that the infiltration of air and errors in grab sampling had a significant impact on calculating N2O emissions.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Article
Engineering, Environmental
C. Polizzi, T. Lotti, A. Ricoveri, R. Campo, C. Vannini, M. Ramazzotti, D. Gabriel, G. Munz
Summary: This study highlights the importance of controlling mineral precipitation on granular sludge systems treating wastewaters prone to inert precipitation to ensure long-term stability. Severe mineral precipitation on the granules' surface can lead to deteriorated reactor performance and biomass activity, with potential mechanisms including substrate diffusion limitation, insufficient mixing, and biofilm erosion. Gravimetric selection proved effective in restoring process performance affected by mineral precipitation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
