Article
Environmental Sciences
Changmin Lee, Munsol Ju, Jongkeun Lee, Seunghwan Kim, Jae Young Kim
Summary: This study aimed to investigate the chronic effects and recovery from inhibition in the anaerobic digestion of swine manure containing chlortetracycline. Two reactors were operated for 900 days, with one reactor spiked with CTC. Methane generation and organic removal did not recover within 300 days after CTC exposure was stopped, due to reduced bacterial diversity and shift in microbial species under long-term antibiotic pressure. Continuous exposure to CTC should be avoided for sustainable management of AD plants treating swine manure.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Huanyu Bao, Zhiqiang Chen, Qinxue Wen, Yiqi Wu, Qiqi Fu
Summary: This study investigated the impact of oxytetracycline on antibiotic resistance genes in soil and revealed the mechanism of gene dissemination during composting. The findings showed that oxytetracycline increased the abundance of resistance genes and highlighted the importance of countermeasures to mitigate potential hazards.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Qian-Qian Zhang, Xiao-Ming Ji, Guang-Ming Tian, Ren-Cun Jin
Summary: The study examined the individual and combined impacts of copper ion (Cu2+) and oxytetracycline (OTC) on anammox performance and its self-recovery process. The results showed that anammox bacteria were inhibited by 1.0 mg L-1 OTC, Cu2+, and OTC + Cu2+, but the inhibition was reversible. The abundance of functional genes and some antibiotic resistance genes (ARGs) were positively related to the dominant bacterium Ca. Kuenenia, indicating that the recovery of performance was associated with the induction of potentially resistant species.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Qian-Qian Zhang, Hui Qian, Pei-Yue Li, Jian-Qiang Zhao, Ya-Qiao Sun, Ren-Cun Jin
Summary: The experimental results show that the stress on Anammox performance caused by Cu2+ is reversible, and the inhibition can be slowed down by the combination of OTM and Cu2+. The positive relation between dominant bacteria and abundance of functional genes implies that the recovery of performance is due to the gradual domestication of latent resistant species.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Xinxin Xu, Tingting Du, Du Guo, Xinye Jiang, Ming Zeng, Nan Wu, Chang Wang, Zongpeng Zhang
Summary: Anammox, an advanced nitrogen removal process, is inhibited by oxytetracycline (OTC) when the concentration reaches 2 mg/L. Machine learning models accurately predict nitrogen removal rates, showing a negative correlation with OTC under both short-term and long-term stress. Water quality parameters and hydraulic retention time play vital roles in experiments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Zhongda Hu, Zijing Fan, Qixuan Song, Rabia Khatoon, Mei Zhang, Ning Wang, Xingzhang Luo
Summary: The addition of OTC during high-temperature anaerobic digestion affects the degradation efficiency of TCs, the activity of microbial strains, and the heavy metal content in water.
Article
Environmental Sciences
Liru Fan, Huayu Li, Yao Chen, Fangxu Jia, Tao Liu, Jianhua Guo, Hong Yao
Summary: The study evaluated the effects of heavy metals on the completely autotrophic nitrogen-removal over nitrite (CANON) process and established a mathematical model to simulate the CANON system considering these impacts.
Article
Engineering, Environmental
Mohamed S. Gaballah, Mostafa Sobhi, Jianbin Guo, Mperejekumana Philbert, Lin Min, Yonghui Zheng, Mohamed A. Ghorab, Renjie Dong
Summary: This study examined the removal, fate, and impacts of four antibiotics in swine manure storage process. The results showed that temperature, retention time, and initial concentration significantly influenced the biodegradation rates of antibiotics and the stability of the storage process. The recommended storage temperature for swine manure was above 20 degrees Celsius with a minimum incubation period of 60 days.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Yousif Abdelrahman Yousif Abdellah, Hong-Yu Chen, Shan-Shan Sun, Xi Yang, Yu-Sen Luo, Ayodeji Bello, Taha Ahmed Mohamed, Rong-Jie Ren, Wan-Ting Li, Rashid Mohamed Ahmed, Rui-Long Wang
Summary: This study investigated the impact of adding humic acid (HA) on antibiotics and antibiotic resistance genes (ARGs) in swine manure composting. The results showed that the addition of 6% HA significantly reduced the levels of antibiotics and ARGs and improved microbial structure and product quality. Therefore, adding HA to compost can improve compost quality and safety, and mitigate the circulation of ARGs in the environment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Youqian Xiao, Hongnan Yang, Dan Zheng, Yi Liu, Liangwei Deng
Summary: The effects of granular activated carbon (GAC) and organic load rate (OLR) on semi-continuous dry anaerobic digestion of swine manure were investigated. The study found that dry anaerobic digestion of swine manure has a good methane production rate and application prospects under appropriate OLR. As OLR increases, the ammonia nitrogen concentration initially increases and then decreases, with the addition of GAC contributing to improved biogas production efficiency.
Article
Green & Sustainable Science & Technology
Zijing Fan, Mei Zhang, Xiaxia Chen, Zhongda Hu, Qihang Shu, Chaosen Jing, Xingzhang Luo
Summary: The study found that a low dose of oxytetracycline (0.1 mg/L) had no inhibitory effect on the thermophilic anaerobic digestion of swine manure, while moderate and high doses (0.5 mg/L and 1.0 mg/L) inhibited methane production. Oxytetracycline can lead to temporary accumulation of volatile fatty acids, but does not significantly increase VFA accumulation.
Article
Engineering, Environmental
Changmin Lee, Jinsung An, Young Su Lee, Kyungho Choi, Jae Young Kim
Summary: This study predicts the concentrations of chlortetracycline in slurry pit and soil, evaluating ecological risks, based on livestock farming practices and uncertainties. The Monte Carlo simulation was used for sensitivity analysis, revealing key factors influencing CTC exposure in soil. The results suggest that ecological risks of CTC in soil can be controlled through appropriate slurry pit farm practices.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Piyush Patil, Mahmoud Sharara, Sanjay Shah, Stephanie Kulesza, John Classen
Summary: Composting swine lagoon sludge is a challenge due to its high mineral and metal content. In this study, in-vessel aerated composting was used to evaluate the effects of sludge inclusion on composting process and end-product quality. The results showed that sludge inclusion had no significant impact on temperature, greenhouse gas emissions, and end-product quality. Both recipes lost carbon and nitrogen, but gained stability and a high germination index.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Infectious Diseases
Mohamed S. Gaballah, Xin Li, Zijia Zhang, Abdulaziz Al-Anazi, Hui Sun, Mostafa Sobhi, Mperejekumana Philbert, Mohamed A. Ghorab, Jianbin Guo, Renjie Dong
Summary: This study developed an effective method for detecting five veterinary antibiotics in swine manure, with a successful extraction rate of 97.36% and good sensitivity, accuracy, and precision. The proposed method shows the potential applicability for detecting different antibiotic compounds from swine manure samples.
Article
Engineering, Environmental
Qinxue Wen, Shuo Yang, Zhiqiang Chen
Summary: The study found that sulfamethoxazole had a significant impact on the microbial community and resistance genes, while norfloxacin had little influence. Thermophilic anaerobic digestion showed higher methane production potential and greater reduction in resistance gene abundance.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Engineering, Environmental
Benedetta Pagliaccia, Emiliano Carretti, Mirko Severi, Debora Berti, Claudio Lubello, Tommaso Lotti
Summary: The recovery and conversion of Extracellular Polymeric Substances (EPS) from sewage sludge into bio-based commodities could improve the economics and environmental sustainability of wastewater treatment. The application of EPS as a biosorbent for heavy metal removal showed high adsorption capacities and diverse adsorption mechanisms, making it suitable for treating complex wastewaters.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
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
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
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Ece Sagir Kurt, Ezgi Atli, Safak Basa, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: This study investigated the impact of settling prior to the aerobic granular sludge (AGS) process on granulation and treatment performance. The results showed that granulation was achieved in both stages, with over 92% COD removal efficiency in each stage. However, settling prior to the AGS process led to a decrease in nitrogen and phosphorus removal efficiencies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(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
T. Prot, W. Pannekoek, C. Belloni, A. Dugulan, R. Hendrikx, L. Korving, M. C. M. van Loosdrecht
Summary: The study found that vivianite can be efficiently formed in undigested activated sludge, and phosphorus recovery can be achieved without the use of a sludge digester. Additionally, recovering vivianite from undigested sludge can reduce waste disposal and mitigate vivianite scaling formation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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)