Article
Agricultural Engineering
Baoyong Zhang, Nianbo Zhang, Ao He, Chen Wang, Zhen Li, Guanjun Zhang, Rong Xue
Summary: The study investigated the impacts of carrier type on anammox community assembly, species interactions, and nitrogen conversion. It was found that different carrier types recruited rare species by imposing selection pressure. Carrier type strongly influenced interactions between keystone species within anammox biofilm. Elastic cubic sponges led to closer cooperation between populations, while plastic hollow cylinders triggered fiercer competition. Metagenomics sequencing results revealed significant differences in nitrogen conversion related genes abundances between carrier types, with higher reads number detected on elastic cubic sponges. The findings provide valuable information for carrier type selection and optimization in the anammox process.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Lifang Yu, Yiting Wang, Xin Tian, Ye Fan, Yexing Liu, Jiayi Yang, Long Li
Summary: The study found that the integrated fixed-film activated sludge (IFAS) reactor had better nitrogen removal performance, with effluent total nitrogen concentrations of 5.17 +/- 0.94 mg/L and 1.52 +/- 0.75 mg/L for MBBR and IFAS, respectively. Furthermore, IFAS maintained a higher partial denitrification (PD) activity, which was beneficial for the progress of the denitrification reaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jing Ding, Wanyi Seow, Jizhong Zhou, Raymond Jianxiong Zeng, Jun Gu, Yan Zhou
Summary: This study found that Fe(II) has both enhancing and inhibiting effects on the anammox process and bacterial growth. Fe(II) at concentrations of 0.09 and 0.12 mmol/L can enhance anammox activity, while 0.75 mmol/L Fe(II) inhibits the activity with recoverable inhibition.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Environmental Sciences
Damian Hausherr, Robert Niederdorfer, Eberhard Morgenroth, Adriano Joss
Summary: The study demonstrates that anammox thrive under mainstream conditions and can withstand typical process disruptions, such as fluctuations in dissolved oxygen levels and temperature. Additionally, anammox activity showed good stability in response to changes in organic loading rate at bench scale and pilot scale experiments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Xinyi Zou, Mengjie Ma, Jiachen Zhu, Qun Zhang, Qianfei Cao, Sami Khasraw Hamid, Chongjun Chen
Summary: The study found that salinity, represented by SO42-, has an impact on the anammox reaction. Increasing concentrations of SO42- decreased the removal efficiency of NH4+-N and NO2--N, as well as affected the sludge characteristics and microbial community structure.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Terrence Green
Summary: This study examined the plant growth promoting activity of black soldier fly larval frass. It was found that Enterococcus bacteria, which are present in the larval gut and decaying catering waste biome, are excreted in the frass. The addition of frass to soil increased the growth of winter wheat, suggesting that Enterococci with rhizobacterial activity play a role in the plant growth promoting activity of frass.
Article
Engineering, Environmental
Weiwei Cai, Linna Cai, Jing Zhao, Hong Yao
Summary: Biofilms are an efficient way of wastewater treatment, but little is known about their formation and development in industrial settings. The interplay between different microhabitats is important for sustaining biofilm formation. SourceTracker analysis showed that the majority of initial biofilm originated from the aggregate, but independent evolution was led by anammox species later on. The microbial interaction pattern and community variation displayed similar trends, but the unknown source proportion of interaction was high throughout the incubation, suggesting different relationships within the distinct microhabitats.
Article
Environmental Sciences
XiaoTong Wang, Hong Yang, Yang Su, XuYan Liu
Summary: The study investigated the nitrogen removal characteristics, physicochemical properties, and microbial community composition of four different anammox sludge morphologies. Results showed that Re exhibited the highest anammox activity, and Rg and Re had higher anammox contribution rates. Different morphologies showed varying microbial community compositions, with Rm having a more complex structure and Rg and Re having more specific microbial communities.
Article
Agricultural Engineering
Shenhua Yang, Yongzhen Peng, Qiong Zhang, Jialin Li, Liang Zhang
Summary: In this study, time-series anammox functional biofilms were obtained in a lab-scale simultaneous partial nitritation/anammox process. The growth rates of anammox bacteria were evaluated and the role of ammonia oxidizing bacteria in the proliferation of anammox bacteria was explored. The study highlights the importance of microbial diversity and stable community composite in the proliferation of anammox bacteria.
BIORESOURCE 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
Green & Sustainable Science & Technology
Ren Li, Lifang Yu, Yiting Wang, Xin Tian, Tian Liu, Dangcong Peng
Summary: This study investigated the adaptation strategy of SPDA systems to low temperature and found that the IFAS reactor was more suitable for operating at 15 degrees Celsius compared to the MBBR system. The results also indicated that the PD process is more sensitive to low temperatures than the anammox process in SPDA systems. Additionally, the study identified EPS mediation and community structure evolution as two adaptive strategies of the SPDA system to temperature decreasing.
JOURNAL OF CLEANER PRODUCTION
(2023)
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
Agricultural Engineering
Fumin Zuo, Qianwen Sui, Dawei Yu, Shuanglin Gui, Kai Zhang, Yuansong Wei
Summary: In order to address the problem of floating and loss of floc sludge caused by gas production in anaerobic ammonia oxidation (anammox) reactors, a limited nitrite supply strategy is proposed in this study to regulate gas production during settling and enhance sludge retention. The results show that the effluent suspended solids in the anammox reactor can be significantly reduced under specific feast-starvation conditions. Even under long-term intermittent nitrite-starvation stress, the maximum growth rate of Candidatus_Kuenenia can still be maintained, indicating the effectiveness of the limited nitrite supply strategy in promoting sludge settlement without affecting the growth rate of anammox sludge.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Kai Wan, Ye Yu, Jinggang Hu, Xuemei Liu, Xiangyi Deng, Junxia Yu, Ruan Chi, Chunqiao Xiao
Summary: This study investigated the recovery process of a reactor after being inhibited by a high nitrogen load. The results showed that after 75 days of recovery, the nitrogen removal rate and stoichiometric ratio of the reactor were restored to pre-inhibition levels. The surface structure of the granular sludge changed to a broccoli-like structure, and there was an increase in the Ca and P contents of the granules. Moreover, the abundance of the anammox bacterium Candidatus brocadia also increased, and it showed a positive correlation with specific microbial species.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Pengyuan Wei, Jun Li, Jing Zhang, Yi Zhang, Rong Luo, Chaofan Xie, Zhaozhao Wang
Summary: In this study, the effects of an aerobic denitrifying bacterium, Acinetobacter sp. WZL728, on the performance of the anoxic/oxic membrane bioreactor (A/O-MBR) were investigated. The presence of WZL728 improved the total nitrogen removal efficiency and extended the filtration cycle of A/O-MBR. The concentration of N-acyl-homoserine lactones and the content of extracellular polymeric substances (EPS) were lower in the presence of WZL728. The abundance of bacteria associated with EPS secretion decreased while the abundance of bacteria associated with EPS degradation increased. The study also revealed a decrease in the synthesis of protein and polysaccharide within the EPS.
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
