Article
Environmental Sciences
Rahim Molaey, Hatice Yesil, Baris Calli, Adile Evren Tugtas
Summary: Interest in using stabilized sewage sludge in agriculture is mainly due to its nutrient content, soil conditioning properties, and water holding capacity. This study integrated anaerobic fermentation with air-assisted ultra-sonication to assess heavy metal leaching from waste activated sludge, demonstrating effective solubilization of target metals.
Article
Environmental Sciences
Lei Li, Chen Cai, Yongdong Chen, Haoyu Liu, Rui Liu, Donghai Yang, Bin Dong, Xiaohu Dai
Summary: Microbial electrolysis cells integrated with anaerobic digestion showed significant enhancement of acidogenic fermentation from waste activated sludge. Electrically-assisted acidogenic fermentation and voltage supplementation resulted in increased production of volatile fatty acids. Voltage supplementation also led to improvements in soluble organic carbon, protein, and polysaccharide concentrations, as well as enzymatic activities, suggesting a secondary solubilization and hydrolysis of sludge.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Agricultural Engineering
Antonio Mineo, Alida Cosenza, Giorgio Mannina
Summary: Volatile fatty acids (VFAs), produced through acidogenic digestion of sewage sludge, play a significant role in achieving carbon neutrality in wastewater treatment plants. However, there is limited research on VFAs production from sludge fermenters with membrane. In this study, VFAs from a pilot plant equipped with a membrane bioreactor and fed with real sewage sludge were monitored, and the optimal operation conditions were determined by investigating the effect of headspace volume (HdV).
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ambrogio Pigoli, Massimo Zilio, Fulvia Tambone, Stefania Mazzini, Micol Schepis, Erik Meers, Oscar Schoumans, Andrea Giordano, Fabrizio Adani
Summary: This study successfully transformed organic wastes into N fertilizers and organic fertilizers using high-solid thermophilic anaerobic digestion (HSAD). The produced fertilizers showed high nitrogen concentration, neutral pH, and readily available phosphorus, making them suitable for agricultural use as soil improvers.
Article
Energy & Fuels
Dominik Andreides, Dana Pokorna, Jana Zabranska
Summary: This study assessed the effects of different syngas loading rates and mechanical stirring on the biomethanation of syngas in a lab-scale continuous anaerobic digester processing sewage sludge. The results showed that mechanical stirring improved the conversion rate of CO and H2, while increased pH resulted in acetic acid accumulation.
Article
Environmental Sciences
Hatice Yesil, Rahim Molaey, Baris Calli, Adile Evren Tugtas
Summary: This study found that a combination of ultrasonication pretreatment and alkaline fermentation can achieve high hydrolysis rate, metal leaching rate, and reduced bioavailability of potentially toxic heavy metals in sewage sludge. The supported liquid membrane recovery method can effectively recover metals from bioleaching effluent.
Article
Environmental Sciences
Xiaoyong Zhang, Zhenjiang Wang, Xiaowei Peng, Jun Xiao, Qijing Wu, Xiaoping Chen
Summary: Anaerobic digestion is a promising method for reducing sewage sludge and recovering energy. A comparative life cycle assessment was conducted to evaluate different anaerobic digestion processes. The results show that anaerobic digestion combined with cogeneration and digestate incineration is advantageous to high energy recovery, but incineration is disadvantageous to economic performance. The study also revealed that the environmental damage is largest in the process of thermophilic anaerobic digestion with digestate incineration, while the smallest load is in mesophilic anaerobic digestion with digestate landfilling. Overall, thermophilic anaerobic digestion combined with thermal hydrolysis pre-treatment exhibits the best resource performance, and digestate incineration and CAD-2 show better comprehensive performance. The deep drying incineration process has better comprehensive performance than sewage sludge anaerobic digestion processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Mukesh Kumar Awasthi, Lukitawesa Lukitawesa, Yumin Duan, Mohammad J. Taherzadeh, Zengqiang Zhang
Summary: In this study, the bacterial community in anaerobic digestion of citrus wastes inoculated with sludge was evaluated, revealing that key bacteria associated with volatile fatty acids (VFAs) production mainly belonged to Firmicutes, Bacteroidetes, and Actinobacteria. The study also observed changes in bacterial diversity among different treatment groups during the anaerobic digestion process.
Article
Engineering, Environmental
Zhi Wang, Yi Wang, Xia Li, Zhan Chen, Xiaomei Kou, Lijuan Gao, Shizhang Wu, Baohua Chai
Summary: This study comprehensively evaluates the impact of calcium peroxide (CP) on anaerobic digestion (AD) of primary and secondary sludge. The results show that CP pretreatment can effectively eliminate fecal coliform and promote the solubilization of secondary sludge. Furthermore, CP pretreatment increases methane production potential, reduces harmful substances, and facilitates the subsequent treatment of biogas slurry. This research is of great significance for pretreatment technology of waste sludge and the application of CP in wastewater treatment plants.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Xuran Liu, Qian Deng, Mingting Du, Qi Lu, Wenneng Zhou, Dongbo Wang
Summary: The presence of PVC microplastics at environmentally relevant levels does not affect methane production but reduces the toxicity of cadmium. When the concentration of PVC microplastics reaches 30 particles/g TS, methane production recovers to 89.7% in the presence of 5 mg Cd/g TS compared to the control. The adsorption of Cd by PVC microplastics is higher than that of sludge-substrate, reducing the bioavailability of Cd during anaerobic digestion.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Thermodynamics
T. J. Bolen, Mahmudul Hasan, Timothy Conway, Djigui David Stephane Yameogo, Pablo Sanchez, Arifur Rahman, Hossain Azam
Summary: This study investigated the impact of co-digestion of waste activated sludge and primary sludge with various organic wastes on biogas production. The results showed that adding cheese whey and grease interceptor waste increased methane production by 15% and 2% respectively, and improved volatile solids removal. However, co-digestion of cheese whey and primary sludge did not enhance biogas production, whereas mixing grease interceptor waste and pulped food waste with primary sludge showed potential for improved biogas production. Additionally, detailed energy balance analysis of a water resource recovery facility was conducted to understand the influence of co-digestion on energy neutrality.
Article
Environmental Sciences
Aleksandra Petrovic, Klavdija Zirngast, Tjasa Cencic Predikaka, Marjana Simonic, Lidija Cucek
Summary: The production of edible vegetable oils generates a large amount of waste, which can have a negative impact on the environment. However, this waste can also be used to produce high value-added products like biogas. This study investigated the mono-digestion and co-digestion of various by-products and wastes from the vegetable oil industry, and found that co-digestion with municipal sewage sludge increased biogas yields. Kinetic analysis showed that the Cone model was the most suitable for the digestion process.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Hongbo Liu, Lu Dong, Xuedong Zhang, Cheng Zhao, Mingze Shi, Yajie Li, He Liu
Summary: Thermal hydrolysis is an effective method to improve the bioconversion of organic matter during sludge anaerobic treatment. Liquid fermentation for volatile fatty acids (VFAs) production using hydrolysate as the substrate has been successfully developed. The concentration of organics in the hydrolysate cannot be arbitrarily increased, and excessive hydrolysis intensity may produce non-biodegradable organics. The choice of appropriate hydrolysis intensity is crucial for the performance of sludge liquid fermentation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Zheng Chen, Yue Rao, Muhammad Usman, Huihui Chen, Andrzej Bialowiec, Shicheng Zhang, Gang Luo
Summary: Hydrothermal conversion is a promising technology for producing bio-fuels from dewatered sewage sludge, but it also generates a significant amount of wastewater. The composition of organic compounds in the wastewater obtained at different temperatures affects the yields of volatile fatty acids through anaerobic fermentation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
George Hurst, Ash Ahmed, Steven Taylor, Silvia Tedesco
Summary: This study investigated the potential of using paper crumb (PC) as a bioresource for producing methane and utilizing the resulting digestate as a water replacement in concrete. The 21-day anaerobic digestion of PC produced 163 ml of methane per gram of volatile solids, and the resulting digestate improved the compressive strength of concrete. Although the digestate reduced the workability of the concrete mix, this issue can be resolved by adding a plasticiser or increasing the water to cement ratio.
Article
Environmental Sciences
Recep Onder Surmeli, Alper Bayrakdar, Rahim Molaey, Baris Calli
WASTE AND BIOMASS VALORIZATION
(2019)
Article
Agricultural Engineering
Rahim Molaey, Alper Bayrakdar, Recep Onder Surmeli, Baris Calli
BIOMASS & BIOENERGY
(2018)
Article
Biotechnology & Applied Microbiology
Rahim Molaey, Alper Bayrakdar, Recep Onder Surmeli, Baris Calli
ENGINEERING IN LIFE SCIENCES
(2019)
Article
Environmental Sciences
Muge Pacal, Neslihan Semerci, Baris Calli
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Biochemistry & Molecular Biology
Alper Bayrakdar, Ebrahim Tilahun, Baris Calli
BIOELECTROCHEMISTRY
(2019)
Article
Biotechnology & Applied Microbiology
Neslihan Semerci, Busra Kunt, Baris Calli
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2019)
Article
Environmental Sciences
Mucahid Cakirgoz, Alper Bayrakdar, Baris Calli
Summary: The study found that the failure of the flow booster led to reduced membrane fluxes in the MBR due to deterioration of activated sludge flocs. Despite activating two external pumps to replace the broken flow booster, the required internal recirculation ratio predicted by the simulation could not be provided, resulting in decreased membrane fluxes.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Hatice Yesil, Baris Calli, Adile Evren Tugtas
Summary: The study demonstrated that utilizing a vapor permeation membrane contactor system can effectively separate volatile fatty acids, and an integrated leach-bed fermentation and membrane separation system can increase VFA production and recovery rate, which is beneficial for high load fermentation systems.
Article
Environmental Sciences
Rahim Molaey, Hatice Yesil, Baris Calli, Adile Evren Tugtas
Summary: Interest in using stabilized sewage sludge in agriculture is mainly due to its nutrient content, soil conditioning properties, and water holding capacity. This study integrated anaerobic fermentation with air-assisted ultra-sonication to assess heavy metal leaching from waste activated sludge, demonstrating effective solubilization of target metals.
Article
Engineering, Environmental
Hatice Yesil, Rahim Molaey, Baris Calli, Adile Evren Tugtas
Summary: A novel approach was developed in this study using pH-controlled fermentation and anaerobic metal bioleaching to reduce ecotoxicity potential of fermented sludge before its land application, showing promising results for reducing metal content and bioavailability in biosolid production for agricultural purposes.
Article
Microbiology
Can Akpolat, Ana Beatriz Fernandez, Pinar Caglayan, Baris Calli, Meral Birbir, Antonio Ventosa
Summary: The study analyzed 30 brine samples from various salt lakes and salterns in Turkey, finding that archaea dominated these habitats while bacteria were present in lower amounts. Various archaeal and bacterial genera were detected, with Haloquadratum and Halorhabdus being the most abundant genera found in all sampling sites.
Article
Environmental Sciences
Hatice Yesil, Rahim Molaey, Baris Calli, Adile Evren Tugtas
Summary: This study found that a combination of ultrasonication pretreatment and alkaline fermentation can achieve high hydrolysis rate, metal leaching rate, and reduced bioavailability of potentially toxic heavy metals in sewage sludge. The supported liquid membrane recovery method can effectively recover metals from bioleaching effluent.
Article
Green & Sustainable Science & Technology
Jumana Al-Mallahi, Recep Onder Surmeli, Baris Calli
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Engineering, Environmental
I Celen-Erdem, E. S. Kurt, B. Bozcelik, B. Calli
WATER SCIENCE AND TECHNOLOGY
(2018)
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)