Article
Environmental Sciences
Jing Huang, Georgios Bekiaris, Temesgen Fitamo, Charlotte Scheutz, Sander Bruun
Summary: In this study, FTIRPAS was successfully used to predict the BMP values of urban organic waste samples from different sources in Denmark, showing high prediction accuracy. The results indicated a positive correlation with relatively easily degradable compounds, and a negative correlation with lignin and hemicellulose.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
W. O. Meneses-Quelal, B. Velazquez-Marti, J. Gaibor-Chavez, Z. Nino-Ruiz
Summary: This study evaluated the anaerobic digestion of agricultural waste, manure, and slaughterhouse residues from species typical of the Andes region, such as llama, vicuna, and guinea pig; quinoa, amaranth, and wheat straw. The highest methane production rates were achieved for flame manure and quinoa straw at an RSI of 1:2, with significant increases compared to an RSI of 1:1. The modified Gompertz model proved to be the best fit for performance analysis, with a constant difference of 7.06% between experimental and predicted values.
Review
Green & Sustainable Science & Technology
Tiago Miguel Cabrita, Maria Teresa Santos
Summary: The anaerobic digestion process is widely used for organic waste treatment, with Biochemical Methane Potential assays being the most commonly applied method for evaluating suitable substrates. This paper provides a review of anaerobic feedstocks, BMP methodologies, experimental conditions, and results from 2008 to 2023. The study found a wide range of anaerobic feedstocks, characterized by different parameters such as TS, VS, COD, and pH. Despite efforts to standardize the BMP method, there are still gaps in experimental conditions and determination of specific methane production, posing challenges for study comparisons.
Article
Agricultural Engineering
Sara Pardilho, Jose C. Pires, Rui Boaventura, Manuel Almeida, Joana Maia Dias
Summary: This study compares the performance of five different kinetic models in describing methane production during the digestion of marine macroalgae waste, and finds that the multi-Gompertz model can predict methane yield more accurately.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Physical
Leonor Sillero, Rosario Solera, Montserrat Perez
Summary: This study aims to investigate the methane generation potential of different samples from the dark acid fermentation of sewage sludge and the effect of high ammonia concentrations in poultry manure when used as a co-substrate. Results show that the addition of poultry manure improves methane production and the mixture of sewage sludge, wine vinasse, and poultry manure has the highest purification percentages and methane yield. The presence of poultry manure also increases microbial concentration during the BMP test.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
U. Galvan-Arzola, C. U. Moreno-Medina, R. Lucho-Chigo, M. D. J. Rodriguez-Rosales, R. Valencia-Vazquez
Summary: The study found that fresh livestock rumen and manure are the best substrates for producing high biogas yields, with potential to increase energy output by improving management and environmental conditions. Residual biomass such as pig manure and other wastes can also be used as substrates for bioenergy production. Residues from aquaculture and fish-based industries are not recommended for bioenergy purposes due to low biogas production.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Energy & Fuels
Andreia D. Santos, Joao R. Silva, Luis M. Castro, Rosa M. Quinta-Ferreira
Summary: This study evaluates the methane production potential of pig slurry anaerobic digestion using two different substrate to inoculum ratios (SIR 0.65 and 1) and compares it with theoretical predictions. The results show that a higher SIR of 1 produced more biogas with higher methane content compared to a lower SIR of 0.65, with an SMP of 0.568 NL CH4/g VS and an average methane content of 83% achieved in the experiment. The estimated value presented a deviation of just 2.96% during the assay with a SIR of 1.
Article
Environmental Sciences
Veysi Bashan, Afsin Y. Cetinkaya
Summary: This study uses the fuzzy DEMATEL method to determine the most influential factors for BMP technical parameters, and finds that parameters such as pH, C/N ratio, and temperature are the most important in the cause-effect mechanism.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Environmental Sciences
Priscila Liane Biesdorf Borth, Jessica Klarosk Helenas Perin, Arthur Ribeiro Torrecilhas, Nicole Caldas Pan, Emilia Kiyomi Kuroda, Fernando Fernandes
Summary: This study evaluated the influence of adding garden waste on the performance of food waste anaerobic digestion. The results showed that in specific conditions, adding garden waste did not positively impact methane production.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2021)
Article
Engineering, Environmental
M. Mofijur, I. M. Rizwanul Fattah, P. Senthil Kumar, Sk Yasir Arafat Siddiki, S. M. Ashrafur Rahman, S. F. Ahmed, Hwai Chyuan Ong, Su Shiung Lam, Irfan Anjum Badruddin, T. M. Yunus Khan, T. M. Mahlia
Summary: The waste generated by the farm animal and meat processing industry can be utilized for energy recovery, with organic materials critical for biogas production through anaerobic digestion, potentially reducing greenhouse gas emissions. Livestock waste in Australia has significant electricity generation potential, with Queensland State capable of producing over half of the electricity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Ihsanullah Sohoo, Marco Ritzkowski, Joern Heerenklage, Kerstin Kuchta
Summary: The municipal solid waste generation rate in Asian cities is increasing exponentially due to urbanization and commercial activities. Developing Asian cities are lacking in adequate waste management and facing energy shortages. Utilizing biochemical methane production from MSW can generate electricity, reduce power shortage, and contribute to climate change mitigation.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Environmental Sciences
T. D. S. Pereira, A. Catenacci, A. Guerreschi, G. Bellandi, F. Malpei
Summary: The management of flower waste from ornamental plants is a topic that hasn't been extensively addressed in the literature. This study characterizes different varieties of flowering plants and investigates the possibility of energy recovery through anaerobic digestion. The results indicate that different parts of the plants have varying biochemical compositions, suggesting the need for different strategies in optimizing material recovery. The study also finds that the type of flower waste part and variety of plant don't significantly affect biogas generation and energy recovery.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sara Pardilho, Rui Boaventura, Manuel Almeida, Joana Maia Dias
Summary: The study evaluated marine macroalgae waste as feedstock for anaerobic digestion processes, finding that the highest biogas volume and methane concentration were obtained at a total solids content of 2.5% TS. The experiments showed an average of 43% COD reduction and 46% VS reduction after 57 days, corresponding to about 27% of the theoretical maximum methane production. However, inhibition of the process was observed when using 3.5% TS, likely due to the accumulation of volatile fatty acids.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
E. Maranon, L. Negral, B. Suarez-Pena, Y. Fernandez-Nava, P. Ormaechea, P. Diaz-Caneja, L. Castrillon
Summary: This study investigated the methane potential of supermarket food waste under thermophilic conditions, finding that a mixture of waste from all supermarket sections produced the highest methane yield. However, excluding fruit and vegetable waste also produced similar results.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Engineering, Chemical
Tianwei Hao, Zheng Liu, Muxiang Liang, Xiaoming Liu, Jing Chen, Xiaohui Wu, Sunita Varjani, Feixiang Zan
Summary: This study demonstrates the significant impact of sulfite pretreatment on the solubilization and substrate release of PS, as well as the reduction of methane production from PS. Additionally, sulfite pretreatment affects the functional groups and degradation extent of PS.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Senem Yazici Guvenc, Gamze Varank, Aleyna Cebi, Bestami Ozkaya
Summary: In this study, the application of the sequential acidification-EAP process for treating biodiesel wastewater resulted in high removal efficiencies for COD, oil-grease, and VFAs. The response surface methodology was used to optimize the EAP oxidation process, achieving a predicted maximum oil-grease removal efficiency of 98.3%.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Elifnaz Unay, Bestami Ozkaya, Hulya Civelek Yoruklu
Summary: Microalgae as a biomass resource with extensive application potential are facing limitations and challenges in cultivation and harvesting methods, this study adopted a multi-criteria decision-making tool to identify the most acceptable cultivation and harvesting methods.
Article
Energy & Fuels
Oznur Yildirim, Dogukan Tunay, Bestami Ozkaya
Summary: This study investigated various pretreatment methods to enhance the biofuel potential of lignocellulosic biomass, and found that acid pretreatment had the highest effect in obtaining reducing sugar. Using the response surface methodology, the optimal conditions for enzymatic hydrolysis were determined as 40 FPU/g biomass, 65-hour retention time, and 45 degrees C temperature. The highest total reducing sugar yield was 30 g fermentable sugar/L or 0.36 g sugar/g biomass, with a bioethanol concentration of 9.5 g/L.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Environmental Sciences
Hulya Civelek Yoruklu, Bestami Ozkaya, Ahmet Demir
Summary: This study discussed the usability of seaweeds in fertilizer production in Istanbul, showing that fermented seaweed can significantly promote plant growth and increase soil moisture-holding capacity. Various methods were used to produce liquid fertilizer, and the results indicated optimal plant growth with specific fermentation and dilution conditions.
Article
Environmental Sciences
Reka Hajdu-Rahkama, Bestamin Ozkaya, Aino-Maija Lakaniemi, Jaakko A. Puhakka
Summary: The aim of this study was to investigate the potential for elemental sulphur recovery from sulphurous solutions under aerobic and anoxic conditions by haloalkalophilic Thioalkalivibrio denitrificans. The results showed that high-rate aerobic biotransformation kinetics of thiosulphate were demonstrated, whereas the rates were slower and no S-0 accumulated under anoxic conditions. Thus, future developments of biotechnical applications for the recovery of S-0 from haloalkaline streams from the process industry should focus on aerobic treatment.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Oznur Yildirim, Dogukan Tunay, Bestami Ozkaya
Summary: This study evaluates the commercial potential of producing β-carotene from microalgae grown in sea water reverse osmosis brine from a bioeconomy perspective. The report thoroughly examines the strengths, weaknesses, opportunities, and threats of the process in the development of the β-carotene market. The biotechnological production of microalgal β-carotene using sea water reverse osmosis is seen as a sustainable solution within the scope of circular bioeconomy, with the market value of natural β-carotene increasing day by day.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Dogukan Tunay, Oznur Yildirim, Bestami Ozkaya, Ahmet Demir
Summary: In this study, mathematical models were developed for monitoring the cultivation of local species of microalgae based on chlorophyll-a and biomass concentration. Different kinetic coefficients were calculated using these models, and it was found that there is a lack of models for determining kinetic coefficients based on chlorophyll-a production.
Article
Environmental Sciences
Neslihan Manav-Demir, Elif Unal
Summary: This paper summarizes the findings of a study on the biochemical methane potential (BMP) of cheese whey and investigates various factors affecting the methane production. The study identifies the optimal mixture of substrates and inoculum for the highest biogas and methane production.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Chemistry, Physical
Hulya Civelek Yoruklu, Bilge Coskuner Filiz, Aysel Kanturk Figen, Bestami Ozkaya
Summary: Nanoparticles (NPs) are used as enhancement additives in biohydrogen production due to their unique features. In this study, the effectiveness and feasibility of NPs in enhancing biohydrogen production over Clostridium sp. were evaluated using the two-stage TOPSIS method. Iron-containing NPs (hematite, magnetite) were determined to be the most effective and economical NPs for increasing the yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Neslihan Manav-Demir
Summary: Fractionation of active biomass in a five-stage Bardenpho process was achieved using a wastewater treatment plant modeling tool based on Activated Sludge Model No. 3 extended with a bio-P module. The biomass fractions were categorized as autotrophs, ordinary heterotrophs, and PAOs. Multiple simulations were conducted to study the effects of different C/N/P ratios in primary effluent on biomass fractionation. The results showed that the mass percentage of autotrophs, heterotrophs, and PAOs in active biomass varied depending on the characteristics of the primary effluent.
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Kubra Ulucan-Altuntas, Neslihan Manav-Demir, Fatih Ilhan, Huseyin Baran Gelgor, Katherine Huddersman, Abhishek Tiwary, Eyup Debik
Summary: This paper presents a case study on non-target analysis of influent and effluent samples from wastewater treatment plants in Kocaeli, Turkiye. The study revealed the presence of emerging pollutants not covered by existing standards, with pharmaceutical compounds being the most prevalent and highly removed. The findings highlight the need for redesigning conventional WWTPs to reduce the potential release and transformation of emerging pollutants in the environment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Dogukan Tunay, Oznur Yildirim, Bestami Ozkaya
Summary: Co-digestion of waste can increase biogas production. The study analyzed the co-digestion potential of food waste and sewage sludge using response surface methodology and exergy analysis, and determined the most suitable operational conditions. The highest biogas production was achieved at a temperature of 55°C, F/I ratio of 1, and food-to-total substrate ratio of 1:3.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Hulya Civelek Yoruklu, Bilge Coskuner Filiz, Aysel Kanturk Figen, Bestami Ozkaya
Summary: Enhancing biohydrogen production by adding nano-sized iron oxide doped metal oxides, especially Fe2O3 doped Al2O3, shows great potential.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Huseyin Sancar Bozkurt, Hulya Civelek Yoruklu, Kutsal Bozkurt, Cenk Denktas, Altan Bozdogan, Orhan Ozdemir, Bestami Ozkaya
Summary: The growing accumulation of microplastics has become a severe environmental and health issue. This study discovered that the probiotic Bifidobacterium infantis is able to degrade polypropylene, a commonly used synthetic plastic, in aerobic conditions. The biodegradation products of this probiotic bacteria can inhibit the growth of pathogenic bacteria. This research offers promising solutions to the global microplastic problem.
INTERNATIONAL JOURNAL OF GLOBAL WARMING
(2022)