Article
Green & Sustainable Science & Technology
Junxiang Xie, Tianyi An, Adams Mabruk, Yayi Wang, Jianfang Wang, Chongjun Chen, Tian C. Zhang
Summary: Different biochars were added to the reactors, resulting in faster start-up of Anammox and improved structural and functional characteristics of the granular sludge.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Hyungmin Choi, Jinsu Kim, Jihun Park, Changsoo Lee
Summary: Even small fluctuations in wastewater's organic matter significantly affect the structure and function of anammox microbial communities. Continuous organic load at 30 mg COD/L improved nitrogen removal efficiency without compromising anammox performance. Higher levels of continuous organic load caused inhibition of anammox activity, while transient organic load's inhibitory effect was fully reversed within one day. Loading an appropriately low amount of organic matter can improve the nitrogen removal performance of anammox granular sludge without sacrificing anammox activity and granule stability under mainstream conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Zhipeng You, Ji Zhao, Han Xiang, Jimiao Wang, Ruihuan Gu, Yan Zhang, Chuanhao Shen, Deshuang Yu, Xiaoxia Wang
Summary: This study compared two methods for re-granulation of granular sludge and found that shaking with zirconia balls can increase the particle size while maintaining high nitrogen removal efficiency, while stirring with a blender can decrease the nitrogen removal efficiency but increase the abundance of indicator microorganisms.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
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)
Article
Engineering, Environmental
Lai Peng, Sheng-Qiang Fan, Guo-Jun Xie, Bing-Jie Ni, Yiwen Liu, Yifeng Xu, Bing-Feng Liu, De-Feng Xing, Hong-Jun Han, Shaoxian Song, Nan-Qi Ren
Summary: The granular bioreactor is an ideal choice for achieving coupled nitrate/nitrite dependent denitrifying anaerobic methane oxidation and anaerobic ammonium oxidation processes. A model framework was developed to understand the mechanisms and provide suggestions for process optimization, showing good predictive ability and consistency with experimental observations. Control of hydraulic retention times and granule sizes can impact microbial abundance and community distribution, leading to reduced operational costs in treatment lines.
CHEMICAL ENGINEERING JOURNAL
(2021)
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)
Article
Environmental Sciences
Boran Wu, Xiuzhong Wang, Chengxian Wang, Bin Lu, Jing Yi, Xiaohu Dai, Xiaoli Chai
Summary: A novel high-concentration powder bio-carrier (HPB) process was developed for the high-load treatment of low-strength municipal wastewater with low C/N ratio, which facilitated rapid sludge micro-granulation and enhanced nitrogen removal efficiency. The process achieved higher volumetric load and optimized microbial structure, leading to promising results for the highly efficient treatment of low-strength municipal wastewater.
Article
Environmental Sciences
Shi Chen, Sheng-Qiang Fan, Guo-Jun Xie, Yifeng Xu, Chuanzhou Liang, Lai Peng
Summary: In this study, a one-dimensional granular sludge model was constructed to examine the relationship between n-DAMO and Anammox and successfully predicted the nitrogen removal kinetics in a membrane granular sludge reactor (MGSR) at different temperatures. The results showed that the coupled n-DAMO and Anammox process based on the granule system achieved high TN removal efficiency and stable nitrogen removal rate in wastewater treatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Anna Christine Trego, Simon Mills, Gavin Collins
Summary: Anaerobic digestion is recognized as a sustainable method for waste management, producing methane-rich biogas. Different specialized granules, including anaerobic and aerobic granules, have opened up new opportunities in wastewater treatment and resource recovery biotechnology. Each type of granule has unique characteristics, biochemical processes, and microbial community compositions.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Victor Guzman-Fierro, Jose Sanhueza, Constanza Arriagada, Luis Pereira, Victor Campos, Juan Jose Gallardo, Marlene Roeckel
Summary: The study showed a direct association between specific nitrification activity (SNA) and the specific surface of granules, highlighting the importance of the outer layer in the nitrification process. Furthermore, specific anammox activity (SAA) varied when faced with real industrial and synthetic substrates, with SAA increasing at higher diameter ranges in industrial wastewater. Granular sedimentation rate could be used as a routine technique for controlling and starting up PN-A reactors, with organic matter potentially beneficial for granular sludge stability and nitrogen removal.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Hui-Min Fu, Meng-Wen Peng, Peng Yan, Zhen Wei, Fang Fang, Jin-Song Guo, You-Peng Chen
Summary: The formation and stability of nanobubbles play a crucial role in maintaining the structure and stability of the AnGS system, with nanobubbles increasing the space and pressure between cells and favoring the formation of porous structures in granules. Additionally, nanobubbles help to avoid granular disintegration and flotation caused by excessive secretion of extracellular polymeric substances, thus contributing to efficient mass transfer in the AnGS system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Rebeca Pallares-Vega, Lucia Hernandez Leal, Benjamin N. Fletcher, Eduardo Vias-Torres, Markc. M. van Loosdrecht, David G. Weissbrodt, Heike Schmitt
Summary: This study investigated the occurrence and removal patterns of antimicrobial agents, antibiotic resistance genes, and E. coli in wastewater treatment plants. The results showed that wastewater treatment reduced the abundance of genes and E. coli, while partially removing antimicrobial agents, with some still detectable after treatment and accumulating in biosolids. Irrespective of the type of sludge treatment, the removal of genes was significantly reduced with increasing hydraulic loads caused by rainfall, and slightly decreased with increasing turbidity.
Article
Agricultural Engineering
Dong Li, Yiwen Dong, Shuai Li, Pengfei Jiang, Jie Zhang
Summary: This article explores the use of biochar and increased HRT to enhance the recovery of stored anaerobic ammonia oxidation granular sludge. The results show that biochar accelerates the recovery process, shortening the time needed for nitrogen removal and re-granulation. It also promotes the growth of Anammox bacteria and improves the stability of the bioreactor. The optimized community structure of biochar makes the system more resistant to risks.
BIORESOURCE TECHNOLOGY
(2023)
Review
Environmental Sciences
Mabruk Adams, Junxiang Xie, Arthur wendinso Judicael Kabore, Yaofeng Chang, Jiawei Xie, Menglei Guo, Chongjun Chen
Summary: This article discusses the application of Anammox granular sludge, including its properties, influencing factors, limitations, cultivation, and research progress. The granulation of Anammox sludge is considered to be the most feasible option for large-scale Anammox application.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Da Kang, Ping Zheng, Wenji Li, Dongdong Xu, Wenda Chen, Chao Pan
Summary: This study investigates the stratification patterns of anammox granular sludge bed (GSB) and its relationship with microbial activity and community under different nitrogen loading rates (NLRs). Results show that the particle size distribution of GSB is significantly correlated with the nitrogen removal rate (NRR) of the anammox system. The microbial community tends to coverage at high NLR. Additionally, the particle size distribution patterns of GSB may serve as a potential auxiliary indicator to reflect microbial activity and community.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)