Article
Environmental Sciences
Hong Yao, Xingcheng Zhao, Liru Fan, Fangxu Jia, Yao Chen, Weiwei Cai, Jianhua Guo
Summary: This study investigated the feasibility of using one-stage partial nitritation/anammox (PN/A) process to treat coal to ethylene glycol (CtEG) wastewater, and achieved a stable nitrogen removal efficiency. The study also successfully predicted the nitrogen removal rate using a kinetic model. Microbial community characterization showed the enrichment of ammonia oxidizing bacteria (AOB) in the flocculent sludge and anammox bacteria (AnAOB) primarily located in the biofilm. Additionally, the presence of free ammonia (FA) and control of residual ammonium were effective in suppressing the growth of nitrite oxidizing bacteria (NOB).
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Multidisciplinary
Ankush Kumar Mishra, Xinyang Liu, Chao Hu, Pingfeng Wang
Summary: The concept of circular economy has been widely adopted to promote sustainable economic growth. Re-X options such as reuse, repair, refurbish, remanufacture, and recycle have been incorporated in product development to reduce waste and pollution. This paper presents a two-stage stochastic optimization model to optimize quality thresholds for reuse, recycling, and remanufacturing, aiming to minimize cost, energy consumption, and environmental impact. The model utilizes reliability information to estimate warranty service cost and end-of-use conditions, and a case study demonstrates its effectiveness in achieving cost and environmental impact reduction in a hybrid manufacturing and remanufacturing process.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Chemical
Alexis F. Mackintosh, Hyunchol Jung, In-Kook Kang, Seongyeun Yoo, Sanggyu Kim, Kangil Choe
Summary: The study developed a hydrothermal polymerization (HTP) catalytic method for converting biomass and organic waste into polymer fuel. A 1700 L binary reactor system was constructed and confirmed the scalability of the catalytic process, providing fundamental data for future commercial scale establishment.
Review
Engineering, Chemical
Megha Goyal, Kulwant Singh, Nitu Bhatnagar
Summary: The primary goal of this study is to systematically evaluate the state-of-art study on the lithium-ion battery industries towards circularity. A circular economy treats all materials as a resource, minimizing consumption, waste, and maximizing durability, reliability, and value. This study examines and classifies various recycling strategies for used LIBs according to current waste treatment technology schemes.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Environmental
Chao He, Xindong Liu, Tongle Guan, Anlong Zhang, Yonghong Liu
Summary: This study showed that the EGSB-Bardenpho process with effluent reflux can effectively remove COD and TN from FLIP. Reflux helped to further remove EfOM and DON, thereby improving the quality of the effluent. The presence of TAN promoted the formation of cocci-dominated granular sludge in the EGSB reactor. The research findings provide valuable insights for developing FLIP treatment technologies.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Wenwei Zhong, Yingnan Zhao, Shunquan Chen, Jialun Zhong, LiWei Guo, Dongyang Zheng, Chun Xie, Chao Ji, Yi Guo, Guangxi Dong, Fengyuan Zhang, Alicia An, Shaoping Li, Sheng Li
Summary: The study found that the OF-MD hybrid system is effective in separating and recycling valuable resources from TCM wastewater. Temperature of the feed and choice of membrane materials impact the performance of MD, with PTFE membranes being a better option for long-term operation at high temperatures.
Article
Chemistry, Physical
Feng Yan, Xiangyi Long, Zhengwei Cui, Marcos Millan, Guanming Yuan, Zhijun Dong, Ye Cong, Jiang Zhang, Baoliu Li, Xuanke Li
Summary: In this study, a stretching technique was used to carbonize mesophase-pitch-based carbon fibers (MPCFs) and improve their physical properties. The application of tension, whether in batch experiments or continuous production, was found to enhance the crystalline structure and physical properties of the fibers.
Article
Thermodynamics
Wenliang Meng, Dongliang Wang, Huairong Zhou, Yong Yang, Hongwei Li, Zuwei Liao, Siyu Yang, Xiaodong Hong, Guixian Li
Summary: A high proportion of renewable energy integration is a characteristic of future electric power grid, and power-to-NH3 technologies will be crucial for inter-quarter long-term energy storage. In addition, CO2 capture in coal-based power plants is essential for peak regulation. This study developed a novel urea synthesis process based on renewable energy, which resulted in significantly lower CO2 emissions compared to traditional coal and natural gas-based processes. While the production cost of the new process is higher, it becomes more economical when considering carbon tax values.
Article
Engineering, Chemical
Fayuan Chen, Zhong Zhang, Fengmi Zeng, Yang Yang, Xianhui Li
Summary: The study constructed a pilot-scale ZLD system using a combination of technologies to treat coal chemical wastewater, achieving high water recovery and recovery of industrial-grade salts at a low cost.
Article
Engineering, Environmental
Daehee Choi, Hojin Shin, Jinyoung Jung
Summary: This study evaluated a three-stage deammonification process for treating mature leachate. The results showed that the ANAMMOX activity was severely inhibited without an internal recycle, but implementing the recycle helped alleviate the inhibition effects and improve nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Thermodynamics
Lichao Ge, Can Zhao, Simo Chen, Qian Li, Tianhong Zhou, Han Jiang, Xi Li, Yang Wang, Chang Xu
Summary: In the preparation process of coal-based activated carbon, the carbonization process plays a significant role in the release of volatiles and the formation of pore structure. This study analyzed the properties of two raw materials and investigated their pyrolysis carbonization characteristics using thermogravimetric and Fourier transform infrared spectroscopy. The results showed that the heating rate had a significant impact on the release of volatiles during the carbonization process.
Article
Energy & Fuels
Guo-chang Song, Wen-ting Xu, Xing-yu Yang, Qiang Song
Summary: The transformation of Pb during coal devolatilization was studied in this research. Devolatilization experiments were conducted on four different coal samples at temperatures ranging from 1100 to 1300°C. The occurrence of Pb in coal and devolatilization products was analyzed, and the release ratio and rate of Pb were found to increase with temperature. The results also showed the different forms of Pb in coal and their changes during devolatilization. This research provides insights into Pb emission and offers guidance for developing control techniques for coal-fired plants.
Article
Engineering, Chemical
F. Vassallo, D. La Corte, N. Cancilla, A. Tamburini, M. Bevacqua, A. Cipollina, G. Micale
Summary: This study focuses on the development and testing of a pilot plant for the selective recovery of magnesium and calcium from spent brines using a novel proprietary crystallization unit. By adding alkaline solution in two consecutive steps and controlling reaction pH, magnesium and calcium hydroxide were selectively precipitated from the waste brine, with high purity and recovery rates achieved.
Article
Chemistry, Physical
Daniel Karthik, Vijay Baheti, Jiri Militky, Muhammad Salman Naeem, Veronika Tunakova, Azam Ali
Summary: This study prepared porous and electrically conductive activated carbon fabric using a novel method for effective electromagnetic shielding. The activated carbon fabric produced at higher carbonization temperatures demonstrated superior electromagnetic shielding effectiveness.
Article
Environmental Sciences
Jiaxin Chen, Biying Zhang, Bianfang Liu, Yanglei Yi, Yuanyuan Shan, Yuan Zhou, Xin Wang, Xin Lu
Summary: This study developed a closed-circuit biorefinery process for complete conversion of lignocellulose into ethanol, biogas, and organic fertilizer. The efficiency of subcritical water pretreatment and ethanol conversion was reduced during reuse of waste for biogas and fertilizer production. The yields of ethanol, biogas, and organic fertilizer were verified through mass balance. Hidden problems in the pilot-scale conversion process were identified, and strategies for optimizing the biorefinery process in the future were provided.
ENVIRONMENTAL RESEARCH
(2022)
Article
Agricultural Engineering
Shaswati Saha, Neha Badhe, Jo De Vrieze, Rima Biswas, Tapas Nandy
BIORESOURCE TECHNOLOGY
(2015)
Article
Engineering, Environmental
S. Saha, N. Badhe, D. Seuntjens, S. E. Vlaeminck, R. Biswas, T. Nandy
WATER SCIENCE AND TECHNOLOGY
(2015)
Article
Engineering, Environmental
Shaswati Saha, Jo De Vrieze, Rima Biswas, Tapas Nandy
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2018)
Article
Biotechnology & Applied Microbiology
Samik Bagchi, Berenice G. Tellez, Hari Ananda Rao, Regina Lamendella, Pascal E. Saikaly
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2015)
Article
Agricultural Engineering
Pravin Manekar, Rima Biswas, Chaitali Urewar, Sukdeb Pal, Tapas Nandy
BIORESOURCE TECHNOLOGY
(2013)
Article
Agricultural Engineering
Neha Badhe, Shaswati Saha, Rima Biswas, Tapas Nandy
BIORESOURCE TECHNOLOGY
(2014)
Article
Multidisciplinary Sciences
Samik Bagchi, Siegfried E. Vlaeminck, Laura A. Sauder, Mariela Mosquera, Josh D. Neufeld, Nico Boon
Article
Engineering, Environmental
Shaswati Saha, Rohan Gupta, Shradhanjali Sethi, Rima Biswas
Summary: This study aims to enhance the COD tolerance of the biological nitrogen removal process by associating methanogens with nitrogen removing bacterial populations. A new microbial system called 'Methammox' was developed for simultaneous COD and ammonia removal at different C:N ratios. The results show that Methammox achieved comparable ammonia and COD removal rates to the nitrogen removing bacterial and methanogenic populations.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Review
Biotechnology & Applied Microbiology
Jayati Arora, Anuj Ranjan, Abhishek Chauhan, Rima Biswas, Vishnu D. Rajput, Svetlana Sushkova, Saglara Mandzhieva, Tatiana Minkina, Tanu Jindal
Summary: The use of surfactants in households and industries is inevitable and their discharge into water bodies can cause potential adverse effects to the ecosystem. Bacteria are the main microorganisms responsible for the biodegradation of surfactants in sewage and natural waters.
JOURNAL OF APPLIED MICROBIOLOGY
(2022)
Article
Environmental Sciences
Amol Shukla, Om Prakash, Rima Biswas, Ritesh Vijay, Sukdeb Pal
Summary: This study explored the removal of ammonia and recovery of resources from complex pharmaceutical wastewater, achieving optimal operating parameters through experimental design and process optimization. The results confirmed the effectiveness of the method in removing ammonia and recovering struvite, and techno-economic assessment revealed its economic viability for industrial applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Shradhanjali Sethi, Rohan Gupta, Ankita Bharshankh, Rojalin Sahu, Rima Biswas
Summary: Microbial granulation technologies (MGT) have been widely used in wastewater management for over fifty years. This review provides a comprehensive overview of the development of MGT-based wastewater management, including the process development and the functional microbial interactions within the granules. The molecular mechanism of granulation through the secretion of extracellular polymeric substances (EPS) and signal molecules is discussed, as well as the recent research interest in recovering useful bioproducts from granular EPS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Jayati Arora, Anuj Ranjan, Abhishek Chauhan, Vishnu D. Rajput, Svetlana Sushkova, Evgeniya V. Prazdnova, Tatiana Minkina, Rima Biswas, Sanket Joshi, Tanu Jindal, Ram Prasad
Summary: The Yamuna River, a tributary of the Ganga River in India, is heavily polluted in the Delhi-NCR region. The excessive foaming of the river is believed to be caused by the overuse of surfactants and the discharge of untreated wastewater. The study collected and analyzed water samples from four sites in the river to determine the surfactant load and investigate surfactant-degrading bacteria. The results showed high surfactant concentrations exceeding permissible limits, and two bacterial species were identified for their potential in degrading surfactants.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2023)
Article
Agricultural Engineering
Rohan Gupta, Shradhanjali Sethi, Rojalin Sahu, Ankita Bharshankh, Rima Biswas
Summary: A study was conducted on a Continuously Stirred Tank Anaerobic Granular Reactor to investigate the impact of seasonal and controlled low temperatures on anaerobic treatment of sewage. The microbiota quickly adapted to temperature fluctuations with intermittent dosing of methanol. Low temperatures affected methane production, leading to a shift in the methanogenic community's focus on cellular repair and transport, thereby decreasing methane yields. However, in the long run, stable and high COD removals, along with low dissolved methane and volatile fatty acids, indicated that low-temperature anaerobic sewage treatment using mesophilic biomass is sustainable.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Shaswati Saha, Neha Badhe, Sukdeb Pal, Rima Biswas, Tapas Nandy
BIOCHEMICAL ENGINEERING JOURNAL
(2017)
Article
Biotechnology & Applied Microbiology
Rima Biswas, Tapas Nandy
ENVIRONMENTAL WASTE MANAGEMENT
(2015)