Article
Engineering, Environmental
Shamim Aryampa, Basant Maheshwari, Elly N. Sabiiti, Montserrat Zamorano
Summary: This study aimed to define ecological sustainability for waste disposal sites (WDS) and developed a model called EcoSWaD for its assessment. Testing at the Kiteezi landfill showed low sustainability values, particularly in the operational and environmental aspects. The overall Sustainability Score indicated that the landfill's sustainability is low.
Article
Green & Sustainable Science & Technology
Xin Li, Laili Wang, Xuemei Ding
Summary: The study on waste management in the textile supply chain in China reveals the challenges including diverse types of waste, low recycling rates, long payback periods for investments, and lack of technical support. Despite exhibiting more sufficient waste management compared to other countries, China still has potential for improvement in waste management practices.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Anurag Deepak, Varun Sharma, Dinesh Kumar
Summary: This paper addresses the environmental burden of existing biomedical waste management in northern India and suggests constructive steps to achieve a less impactful environment through Life Cycle Assessment (LCA). The study finds that an integrated system including incineration with energy recovery, autoclave-shredder, chemical disinfection, and Effluent Treatment Plant (ETP) reduces the environmental burden compared to the present state. The paper suggests that LCA is a beneficial tool for decision-makers and managers to reduce environmental burden and develop a life cycle inventory database for developed economies.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Geological
Shriful Islam, David J. Williams, Md Habibullah Bhuyan
Summary: This study used high constant rate of loading (CRL) and accelerated loading in a purpose-built, large, instrumented, stress-controlled slurry consolidometer to examine and compare the consolidation behavior of coal tailings, red mud, and gold tailings. The findings showed that the consolidation behavior of the tailings varied with the nature of the tailings and with the loading applied.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Hisham Afash, Bertug Ozarisoy, Hasim Altan, Cenk Budayan
Summary: End-of-life tires are a common and hazardous type of waste that can be thermally degraded through pyrolysis to produce useful byproducts. However, the environmental impact of using waste tires as feedstock has been neglected. This paper reviews previous studies and applies the methodology to an industrial-scale pyrolysis plant to explore influential parameters and emphasize the need for environmental analyses. The results highlight the importance of testing the sustainability of pyrolysis as a tire waste management strategy at an industrial and commercial scale.
Article
Environmental Sciences
Jiefeng Xiao, Tao Tao, Yuqing Shi, Jun Zhao, Bingsi Wu, Jun Tai, Mengqi Xu, Xing Zhang, Yuru Peng, Zhujie Bi, Di Feng, Guangren Qian
Summary: Food waste disposal is a significant concern in developing countries due to its impacts on resident, aquatic, and soil ecosystem health. Shanghai, as a leading city in China, demonstrates the future direction of food waste management in the nation. The study analyzed the environmental impact change in Shanghai from 1986 to 2020, and found that the banning of open dumping, landfill, and incineration in favor of centralized compost and anaerobic digestion resulted in a sharp decrease in environmental impact, particularly in Freshwater Aquatic Ecotoxicity Potential and Global Warming Potential. To further reduce environmental impact, efforts should focus on improving the collection rate of biogas and landfill gas and enhancing the quality and utilization of residues from anaerobic digestion and compost plants. The driving forces behind sustainable food waste management in Shanghai include economic development, environmental regulations, and national/local standards.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Geological
Masoomeh Khodabakhshi, Mahyar Arabani
Summary: This study investigates the application of waste plastic mixed with sand in geotechnical engineering through large-scale experiments. The results show that the addition of plastic waste can improve soil strength and compressibility, while decreasing the undrained elastic modulus.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2023)
Article
Development Studies
Olanrewaju Timothy Dada
Summary: The siting of landfills can cause uncertainty, anxiety, and unrest in nearby residential neighborhoods. Hazards from landfill pollutants vary significantly in space, but remain consistent between dry and rainy seasons. Factors such as place dependence, social bonding, and economic status play a significant role in residents' decision to continue living in affected neighborhoods.
JOURNAL OF ENVIRONMENTAL PLANNING AND MANAGEMENT
(2021)
Article
Engineering, Geological
Mahyar Arabani, Masoomeh Khodabakhshi
Summary: This study investigated the dynamic properties of sand mixed with crushed HDPE waste and found that increasing the percentage of HDPE led to a higher damping ratio and lower shear stiffness. Moreover, increasing the shear amplitude further decreased the dynamic shear stiffness and increased the damping ratio.
ENVIRONMENTAL GEOTECHNICS
(2023)
Article
Green & Sustainable Science & Technology
Amanda M. Y. Chu
Summary: Illegal waste dumping poses a threat to human health and the global environment. The government in Hong Kong has proposed a quantity-based municipal solid waste charging scheme to address this issue. However, individuals may still engage in improper waste disposal despite the implementation of such a scheme. Adopting the neutralization theory, a study conducted an online survey with 273 respondents to examine the reasons behind improper waste dumping intentions, revealing two types of neutralization factors: intrinsic and extrinsic. The findings suggest that intrinsic neutralization and gender play significant roles in influencing illegal waste dumping intentions, even when controlling for attitudes towards illegal waste dumping.
Article
Engineering, Geological
Suryaleen Rout, Suresh Prasad Singh
Summary: The abundance of pond ash and its resemblance to natural sand make it a potential substitute for sand in sand-bentonite (SB) liner material. This study investigates the compaction, strength, permeability, and shrinkage characteristics of pond ash-bentonite (PAB) and SB mixes at different water contents. The results show that the PAB mix exhibits higher unconfined compressive strength (UCS) and hydraulic conductivity compared to the SB mix, and the mechanical properties of the mixes are influenced by the shape of coarse fraction particles and microstructural arrangements.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Geological
Suryaleen Rout, Suresh Prasad Singh
Summary: The study investigated the compressibility and hydraulic conductivity of compacted pond ash-bentonite and sand-bentonite mixes through conventional consolidation tests. It was found that the compression index and coefficient of volume change increase with bentonite content, while the coefficient of consolidation decreases. Empirical models were proposed to predict these parameters based on basic soil parameters.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Giovani Jordi Bruschi, Carolina Pereira dos Santos, Suellen Tonatto Ferrazzo, Mariana Tonini de Araujo, Nilo Cesar Consoli
Summary: The importance of effective binders with low environmental impacts for sustainable engineering practices was highlighted in this study. The study evaluated parameters controlling loss of mass and stiffness degradation of 'green' stabilised bauxite tailings (BT) and introduced a porosity/binder index to rationalize dosage methodology. The study also compared the performance of alkali-activated binder with sugarcane bagasse ash and carbide lime with that of Portland cement, showing that lower porosity and higher cement content resulted in better mechanical performance.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Brendan C. O'Kelly, Abbas El-Zein, Xiaoli Liu, Anjan Patel, Xunchang Fei, Susmita Sharma, Arif Mohammad, Venkata Siva Naga Sai Goli, Jing Jing Wang, Dunzhu Li, Yunhong Shi, Liwen Xiao, Ganaraj Kuntikana, Bettadapura Subramanyam Shashank, Theo S. Sarris, Bendadi Hanumantha Rao, Abdel Mohsen O. Mohamed, Evan K. Paleologos, Mohaddeseh Mousavi Nezhad, Devendra N. Singh
Summary: Microplastics (MPs) are persistent contaminants in the terrestrial subsurface with significant effects on soil biological and ecosystem functions. Research has focused on the accumulation, fate, and effects of MPs in soil, as well as mitigation measures such as using MP-eating soil bacteria and fungi. Additionally, studies have explored the combined effects of MPs and other environmental contaminants, along with standardization of detection methods for MPs in soils.
ENVIRONMENTAL GEOTECHNICS
(2021)
Article
Engineering, Geological
Evan K. Paleologos, Brendan C. O'Kelly, Chao-Sheng Tang, Ken Cornell, Jorge Rodriguez-Chueca, Hossam Abuel-Naga, Eugeniusz Koda, Arvin Farid, Magdalena Daria Vaverkova, Konstantinos Kostarelos, Venkata Siva Naga Sai Goli, Sonia Guerra-Rodriguez, Eng-Choon Leong, Prathyusha Jayanthi, Bettadapura S. Shashank, Susmita Sharma, Sowmya Shreedhar, Arif Mohammad, Bhagwanjee Jha, Ganaraj Kuntikana, Myint Win Bo, Abdel-Mohsen O. Mohamed, Devendra N. Singh
Summary: The COVID-19 pandemic has highlighted risks to the environment and public health, with concerns about wastewater monitoring and outdoor disinfection practices. Developing countries need to enhance water resource protection and treatment technologies to improve resilience against pandemics.
ENVIRONMENTAL GEOTECHNICS
(2021)
Review
Energy & Fuels
Patrick T. Sekoai, Cecil Naphtaly Moro Ouma, Stephanus Petrus du Preez, Phillimon Modisha, Nicolaas Engelbrecht, Dmitri G. Bessarabov, Anish Ghimire
Review
Biotechnology & Applied Microbiology
Gabriel Capson-Tojo, Damien J. Batstone, Maria Grassino, Siegfried E. Vlaeminck, Daniel Puyol, Willy Verstraete, Robbert Kleerebezem, Adrian Oehmen, Anish Ghimire, Ilje Pikaar, Juan M. Lema, Tim Hulsen
BIOTECHNOLOGY ADVANCES
(2020)
Article
Agricultural Engineering
Patrick T. Sekoai, Michael O. Daramola, Boitumelo Mogwase, Nicolaas Engelbrecht, Kelvin O. Yoro, Stephanus Petrus du Preez, Sizwe Mhlongo, Obinna T. Ezeokoli, Anish Ghimire, Augustine O. Ayeni, Gloria N. Hlongwane
BIOMASS & BIOENERGY
(2020)
Article
Environmental Sciences
Anish Ghimire, Vincenzo Luongo, Luigi Frunzo, Piet N. L. Lens, Francesco Pirozzi, Giovanni Esposito
Summary: The study found that methane production was higher under high temperature anaerobic digestion tests compared to mesophilic tests, while hydrogen yield was higher in mesophilic dark fermentation tests.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Patrick T. Sekoai, Anish Ghimire, Obinna T. Ezeokoli, Subramanya Rao, Wing Y. Ngan, Olivier Habimana, Yuan Yao, Pu Yang, Aster Hei Yiu Fung, Kelvin O. Yoro, Michael O. Daramola, Chun-Hsiung Hung
Summary: The article explores the utilization of VFAs from dark fermentation for the production of valuable compounds such as PHAs, microbial-based fuels, and other important biotechnological products. It also discusses strategies for enhancing the extraction of VFAs from acidogenic effluents, as well as the application of nanoparticles in VFAs recovery processes. Furthermore, recent advancements in dark fermentation-based biorefineries, including pilot-scale processes, are highlighted, along with suggestions for the advancement of such biorefineries using VFAs derived from acidogenic processes.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Engineering, Chemical
Guy Howard, Anisha Nijhawan, Adrian Flint, Manish Baidya, Maria Pregnolato, Anish Ghimire, Moti Poudel, Eunice Lo, Subodh Sharma, Bizatu Mengustu, Dinku Mekbib Ayele, Abraham Geremew, Tadesse Wondim
Summary: Climate change poses a significant threat to water and sanitation services, especially in rural communities and small towns in low- and middle-income countries. The lack of a simple framework to assess the resilience of services hinders the development of strategies to improve services. An interdisciplinary team has proposed a multi-dimensional framework for quantifying the resilience of water and sanitation services in LMICs.
Article
Energy & Fuels
Aakash Khadka, Anmol Parajuli, Sheila Dangol, Bijay Thapa, Lokesh Sapkota, Alessandro A. Carmona-Martinez, Anish Ghimire
Summary: This study evaluates the effects of varying substrate to inoculum ratios on biogas production during anaerobic digestion of simulated food waste. The results show that the substrate to inoculum ratio has a significant impact on biogas production, with the ratio of 1 showing the highest production rate and the ratio of 6 showing the lowest. The maximum predicted biogas yields are 668.65 NmL/gVS and 653.17 NmL/gVS according to different models. The study also reveals a significant effect of the substrate to inoculum ratio on the kinetics and energy recovery of anaerobic digestion.
Review
Environmental Sciences
S. Dangol, A. Ghimire, S. Tuladhar, A. Khadka, B. Thapa, L. Sapkota
Summary: This review provides an updated overview of the advancements in biohythane and organic acids production from food waste in the two-stage dark fermentation-anaerobic digestion process. It also discusses the economic and future prospective of utilizing organic acids for different biochemicals. Optimum operational parameters, pretreatment methods, and reactor configurations are essential for the integrated process.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Water Resources
Suman Prakash Pradhan, Prayon Joshi, Prativa Poudel, Anish Ghimire, Samikshya Chhetri, Junu Maharjan, Nilisha Khadgi, Moti Poudel, Anup Luitel, Bishnu Prasad Pandey, Ram Devi Tachamo Shah, Subodh Sharma
Summary: This article introduces the assessment and monitoring of drinking water quality conducted by Kathmandu University Drinking Water Supply Centre. Continuous monitoring of physico-chemical and biological parameters shows that the analyzed variables comply with national drinking water quality standards and exhibit significant differences before and after treatment. The importance of continuous monitoring and team effort for the improvement and upkeep of drinking water quality is emphasized.
SUSTAINABLE WATER RESOURCES MANAGEMENT
(2022)
Article
Environmental Sciences
Anisha Nijhawan, Guy Howard, Moti Poudel, Maria Pregnolato, Yuen Tung Eunice Lo, Anish Ghimire, Manish Baidya, Abraham Geremew, Adrian Flint, Yohannes Mulugeta
Summary: Understanding the resilience of water supplies to climate change is of utmost importance in ensuring health targets are met. Applying the How Tough is WASH (HTIW) framework to community-managed water supplies in Ethiopia and Nepal, we found that it provided an objective measure of resilience and could be used to prioritize actions. Low to moderate resilience to climate change was observed in both countries, indicating the need for increased investment and support. Simple frameworks like HTIW are essential in supporting decision-making and identifying priority communities and actions.
Article
Environmental Sciences
Shiwasish Singh Swar, Jarungwit Boonnorat, Anish Ghimire
Summary: This study aims to assess the potential of algae-based treatment of pretreated landfill leachate for the removal of conventional pollutants. The results show that the combined physicochemical and algal treatment can effectively remove pollutants from landfill leachate, offering an exciting alternative for its treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biotechnology & Applied Microbiology
Anmol Parajuli, Aakash Khadka, Lokesh Sapkota, Anish Ghimire
Summary: The start-up of two-stage, semi-continuous mesophilic anaerobic digestion of food waste can be stabilized by adjusting the hydraulic retention time and organic-loading rate. The study found that by modifying these parameters, it was possible to achieve stable production of biogas and multiple biofuels. The results also showed the importance of monitoring the volatile fatty acids/alkalinity ratio to prevent operational issues.
FERMENTATION-BASEL
(2022)
