Article
Thermodynamics
Ingrid R. F. S. Alves, Claudio F. Mahler, Luciano B. Oliveira, Marcelo M. Reis, Joao P. Bassin
Summary: The addition of crude glycerol in anaerobic co-digestion process can significantly increase the production of biogas and methane. Although methane production was transiently inhibited at the highest concentration in the trials, it was restored and even maximized after a period of adaptation.
Article
Energy & Fuels
Miriam Tena, Montserrat Perez, Rosario Solera
Summary: This study investigated the effect of hydraulic retention time on methane production in a two-stage anaerobic digestion system. Different retention times had significant impacts on methane production, yield, and Archaea activity.
Article
Agricultural Engineering
Lili Wang, Yibo Li, Lei Xu, Dongsheng Sun, Yihao Wang, Zhongjiang Wang
Summary: This study investigated the pretreatment of rice straw using cow breeding wastewater. The results showed that filtering the wastewater improved the pretreatment effect by adsorbing ammonium nitrogen and achieving higher solids loading. Semi-sealed treatment had slightly lower lignin removal and methane production compared to sealed treatment, while the results of open treatment were similar to the control group.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
F. Karouach, M. Bakraoui, A. Zguani, A. Hammadi, H. El Bari
Summary: The anaerobic co-digestion of sludge from recycled pulp and paper industry (RPPS) with vinasse effluent from alcohol distilleries (VW) improved methane production and biodegradability. The kinetic study showed that the Richards model was the most appropriate for adjusting methane production from RPPS and VW co-digestion.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
T. P. A. U. Thennakoon, S. Ekanayake
Summary: The research aimed to scientifically prove that parboiled Sri Lankan traditional rice elicits lower glycaemic responses compared to raw unpolished or polished rice. Cooked parboiled rice contained significantly high moisture than raw or raw polished. All varieties of parboiled and raw polished were found to elicit low and high glycaemic index respectively.
Review
Agronomy
Jhauharotul Muchlisyiyah, Rosnah Shamsudin, Roseliza Kadir Basha, Radhiah Shukri, Syahmeer How, Keshavan Niranjan, Daniel Onwude
Summary: This study reviews the processing condition, nutritional properties, potential use, emerging green technologies, and health benefits of parboiled rice. It also discusses the outlook and challenges regarding parboiled rice and provides an overview of emerging green solutions to minimize wastewater creation and excessive energy usage. The limitation of parboiled rice is its color, which can be balanced with the intensity of the process. Due to its multiple advantages, parboiled rice is a possible breakthrough in the agriculture and food industries. This review aims to provide a thorough understanding for academic and industrial purposes.
Article
Chemistry, Applied
Xiuxiu Yin, Zhangjian Hu, Yuxue Zheng, Ziqi Chai, Xiangli Kong, Shiguo Chen, Xingqian Ye, Jinhu Tian
Summary: In this study, the multi-scale structural changes and digestibility of parboiled rice were systematically characterized and an in vivo postprandial blood glucose test was conducted. The results showed that parboiling had minimal effect on the side chain distribution, helical structure, and order of parboiled rice. The crystal type of rice starch changed after parboiling, resulting in a decrease in relative crystallinity. The in vivo study also demonstrated that parboiling significantly reduced the glycaemic index of rice. This work provides valuable insights into the parboiling conditions, structural changes, and digestibility of parboiled rice.
Review
Energy & Fuels
Chilaka Chetan Naveen, Bella Kunnoth, Sridhar Pilli, Polisetty Venkateswara Rao, Rao Y. Surampalli, Tian C. Zhang, Puspendu Bhunia
Summary: Parboiled rice mill wastewater (PRMWW) generated from the growing paddy crop poses a significant threat to the environment. This study provides a systematic and critical review of the parboiling process, waste fractions, different treatment options, and the application of anaerobic digestion (AD) for treating PRMWW and recovering energy.
BIOENERGY RESEARCH
(2022)
Review
Environmental Sciences
M. Fabrizio Ortiz-Sanchez, German Cuevas-Rodriguez
Summary: The usage of fossil fuels and lack of wastewater treatment in Mexico can be addressed by developing wastewater treatment technologies that incorporate energy recovery. A systematic review based on the PRISMA methodology was conducted to identify and review studies on energy recovery using wastewater as a substrate in Mexico. The results show that methane, hydrogen, and electricity are the most researched energy recovery products, with up-flow anaerobic sludge bed (UASB) reactors and microbial fuel cells (MFCs) being the preferred technologies for methane and electricity production respectively. Methane-recovering technologies in Mexican peer-reviewed studies showed higher energy production per kgCOD removed compared to hydrogen recovery and electricity production.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Energy & Fuels
G. Gomez-Pozuelo, P. Pizarro, J. A. Botas, D. P. Serrano
Summary: This study reports the use of silica materials produced from rice husk as DeCH(4) catalysts, with silica samples showing large surface area and amorphous nature exhibiting the highest catalytic activity and remarkable resistance against deactivation.
Article
Chemistry, Physical
You-Hsin Chen, Thi Ngoc Lan Thao Ngo, Kung-Yuh Chiang
Summary: This research investigates enhanced hydrogen production in sewage sludge and industrial wastewater sludge co-gasification. The experimental results demonstrate that the high catalytic Fe/Mn content in industrial wastewater sludge increases hydrogen production, with the produced gas heating value and cold gas efficiency falling within acceptable ranges.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Michel de Santi Caraca, Roberto Alves de Oliveira, Rose Maria Duda
Summary: Anaerobic co-digestion (AcoD) is a promising method to improve the performance of anaerobic reactors in vinasse treatment and provide a solution for dairy cattle wastewater management. In this study, the co-digestion of sugarcane vinasse with DCW in up-flow anaerobic sludge blanket reactors (UASB-R1 and R2) resulted in a significant improvement in COD removal and methane production. The electrical power potential of the system was also evaluated, showing that AcoD can contribute to a significant portion of the energy needed for sugarcane processing.
BIOENERGY RESEARCH
(2023)
Article
Engineering, Chemical
Waclaw Romaniuk, Ivan Rogovskii, Victor Polishchuk, Liudmyla Titova, Kinga Borek, Serhiy Shvorov, Kamil Roman, Oleksiy Solomka, Svetlana Tarasenko, Volodimir Didur, Victor Biletskii
Summary: The volume of ethanol production waste-molasses waste in Ukraine reaches up to 4 million m(3) per year and is causing environmental pollution. The development of an effective technology for using molasses in biogas plants to obtain energy gas-biogas is urgently needed. The goal of this study was to determine the optimal volume of molasses bard loaded into the methane tank in a quasi-continuous mode to maximize biogas production. Experimental studies were conducted on a laboratory biogas plant to determine the maximum biogas output based on different molasses compositions. The results showed that adding 10.5% and 26.1% molasses to cattle manure resulted in the highest biogas output under the periodic loading system. Adding molasses in the amount of 30% of the substrate volume based on cattle manure is recommended to increase biogas production.
Article
Engineering, Chemical
Jonghun Lim, Chonghyo Joo, Jaewon Lee, Hyungtae Cho, Junghwan Kim
Summary: This study proposes a novel SMR process that utilizes desalination wastewater to reduce CO2 emissions and produce carbon-neutral hydrogen. The process model captures CO2 from the SMR process and uses mineral ions in desalination wastewater to carbonate the captured CO2. The economic feasibility of the proposed process is demonstrated through the assessment of the levelized cost of hydrogen.
Article
Energy & Fuels
Rocio Auxiliadora Lopez, Miriam Tena, Rosario Solera, Montserrat Perez
Summary: This study aimed to energetically valorize sludge from wastewater treatment plants and discharges from the wine sector through anaerobic co-digestion. Two different processes, single-stage mesophilic anaerobic digestion and Temperature-Phased Anaerobic Digestion (TPAD), were employed for the valorization. Biodegradability tests were conducted to determine the methane production yield, and the results showed that the single-stage process was more effective in methane generation compared to the TPAD process.
Article
Environmental Sciences
Williane Vieira Macedo, Jan Struckmann Poulsen, Guilherme Henrique Duarte Oliveira, Jeppe Lund Nielsen, Marcelo Zaiat
Summary: This study found that bioconversion of TBBPA mainly occurs during the strictly fermentative stage of anaerobic digestion, facilitated by glycolysis and transformation into short-chain fatty acids. The degradation kinetics of TBBPA were inversely proportional to the complexity of the wastewater, with different apparent kinetics constants for different carbon sources. The loading rate of micropollutants relative to overall organic loading rate is crucial for investigating cometabolic transformations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Energy & Fuels
Gustavo Mockaitis, Guillaume Bruant, Eugenio Foresti, Marcelo Zaiat, Serge R. Guiot
Summary: This study investigates the effect of four different physicochemical pretreatments on anaerobic inoculum for alcohols production. It was found that thermal and acidic-thermal pretreatments selected communities more suitable for acetate and butyrate solventogenesis. The highest concentrations of ethanol and butanol produced were achieved with thermal and acidic-thermal pretreatments. Sequencing data revealed the bacterial genera Pseudomonas, Brevundimonas, and Clostridium as the dominant species selected by these pretreatments.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Rafael Frederico Fonseca, Marcelo Zaiat
Summary: Anaerobic digestion is a complex biological process used for decomposing organic matter and producing metabolites and biogas. Monitoring system and process understanding are key to improve the performance and stability. This study developed a low-cost electrochemical sensor for monitoring components in wastewater treatment plants.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Valdinei L. Belini, Mayara C. Felipe, Juliano J. Corbi, Marcelo Zaiat
Summary: This study proposes a quick and reliable method for counting the number of Enchytraeus crypticus in soil by using an automated image analysis algorithm. A comparison between the automated and manual methods shows no significant differences, indicating the effectiveness of the proposed method. This method overcomes the time-consuming manual counting process and is suitable for large-scale soil toxicity studies.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Chemistry, Physical
Michael Antonio Piffer, Cristiane Arruda Oliveira, Patricia Bovio-Winkler, Felipe Eng, Claudia Etchebehere, Marcelo Zaiat, Claudio Augusto Oller do Nascimento, Lucas Tadeu Fuess
Summary: This study evaluated the effects of bicarbonate and sulfate availability on sulfidogenesis and biohydrogen production during the fermentation of sugarcane vinasse. The results showed that biohydrogen production was favored at low sulfate and bicarbonate concentrations, while sulfidogenesis was inhibited. The study also identified the microbial groups involved in biohydrogen production, sulfate removal, and acetate production under different pH conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Oscar Daniel Valmana Garcia, Ana Maria Pereira Neto, Mercia Regina Domingues Moretto, Marcelo Zaiat, Gilberto Martins
Summary: Determining the biochemical methane potential (BMP) is a crucial step in studying anaerobic digestion of sugarcane vinasse. However, the impact of different food-to-microorganism ratio on BMP estimation has not been extensively explored. This research optimized the food-to-microorganism ratio to maximize the BMP of mixed origin vinasse and compared it to literature. By increasing vinasse concentration, the BMP of the vinasse was maximized, with a methane conversion efficiency of 95 +/- 2.55% compared to the theoretical BMP.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Lucas T. Fuess, Adriana F. M. Braga, Felipe Eng, Gustavo B. Gregoracci, Flavia T. Saia, Marcelo Zaiat, Piet N. L. Lens
Summary: Removing sulfate prior to methanogenesis and maintaining year-round operation are the main challenges for highly efficient bioenergy recovery from sugarcane vinasse. The study assessed the establishment and optimization of sulfidogenesis during vinasse fermentation at different temperature levels and the impact of replacing vinasse by molasses. The results showed that sulfidogenesis was not efficiently established at 30 degrees C, but successful sulfate removal was achieved at 55 degrees C. Replacing vinasse by molasses negatively impacted sulfate-reducing bacteria but they were resilient to severe acidic and thermophilic conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Rafaely X. de S. Furtado, Carolina A. Sabatini, Isabel K. Sakamoto, Marcelo Zaiat, Eduardo B. Azevedo
Summary: Perfluorooctane sulfonic acid (PFOS) is widely used in the textile industry as a surfactant and can be found in various products. This study investigated the degradation of PFOS in anaerobic conditions using simulated domestic sewage. After 10 days, a 24% degradation of PFOS was achieved. Biodegradation products were identified, including a new compound: C4F9CHO (2,2,3,3,4,4,5,5,5-nonafluoropentanal). The biodegradation products showed increased lipophilicities and ecotoxicities compared to PFOS.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Bruno W. Picao, Daniele O. Goncalves, Renata M. M. G. P. Ribeiro, Mateus N. Esperanca, Guilherme Peixoto, Marcel O. Cerri
Summary: This study evaluated the effects of adding helical flow promoters on oxygen transfer and gas holdup in an airlift bioreactor. The results showed that the inclusion of helical flow promoters improved oxygen transfer and gas holdup performance, leading to enhanced bioprocess optimization.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2023)
Article
Environmental Sciences
Willame A. Cavalcante, Camila Aparecida de Menezes, Francisco C. G. da Silva, Tito A. Gehring, Renato C. Leita, Marcelo Zaiat
Summary: This investigation presents a reproducible approach to determine the limits of an upflow anaerobic sludge blanket (UASB) reactor for methanizing fruit and vegetable waste. Two identical UASB reactors were operated for 240 days and achieved methane yield close to 0.250 LCH4 gCOD-1 up to an organic load rate (OLR) of 7.7 gCOD L-1 d-1. The maximum volumetric methane production rate of 2.0 LCH4 L-1 d-1 was observed for OLR ranges between 7.7 and 10 gCOD L-1 d-1. However, an overload at an OLR of 10 gCOD L-1 d-1 resulted in a significant reduction in methane production in both reactors. The study estimated a maximum loading capacity of approximately 8 gCOD L-1 d-1 based on the methanogenic activity of the UASB reactors' sludge.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biotechnology & Applied Microbiology
Ana Paula Trevisan, Lucas Tadeu Fuess, Marcelo Zaiat, Eduardo Borges Lied, Simone Damasceno Gomes
Summary: This study simulated the application of continuous multiple tube reactor (CMTR) in the production of biohydrogen from sucrose-rich wastewater. The study assessed the operational limits of the reactor and found that the biohydrogen production was maximized under moderate wastewater concentration and optimal organic loading rate (OLR).
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Cassamo U. Mussagy, Amanda dos Santos, Gabriely F. G. Militao, Jessica Carolina Silva de Oliveira, Gisela de A. Umbuzeiro, Guilherme Peixoto, Adalberto Pessoa Jr, Valeria C. Santos-Ebinuma
Summary: This study uses the yeast Phaffia rhodozyma as biomass feedstock to produce astaxanthin and generate biogas from waste biomass, aiming to achieve sustainability and minimize the use of synthetic counterparts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Thiago H. G. da Silva, Rafaely X. S. Furtado, Marcelo Zaiat, Eduardo B. Azevedo
Summary: This study assessed the feasibility of coupling the heterogeneous Fenton process to biologically treated domestic sewage for the removal of diclofenac, ranitidine, and simvastatin. The results showed that the purified natural zeolite impregnated with iron was an effective catalyst for the process. However, the process had disadvantages such as high hydrogen peroxide consumption and size exclusion effects.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
E. G. F. Rezende, G. H. D. Oliveira, P. T. Couto, M. Zaiat, R. Ribeiro
Summary: Models were developed to represent the selection of PHA-producing microorganisms in a sequencing batch reactor (SBR) and the accumulation of PHA in a fed-batch reactor from sugarcane vinasse. Sensitivity analysis and optimization were conducted to understand the influence of parameters and operational conditions on PHA production. The results showed that higher CODt/Nitrogen ratios in the SBR favored the growth response rather than storage, shedding light on the impact of CODt/Nitrogen ratio on PHA accumulation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Lucas T. Fuess, Adriana F. M. Braga, Marcelo Zaiat, Piet N. L. Lens
Summary: This study investigated the use of sulfate-free vinasse and molasses as substrates to obtain enhanced year-round methane production in sugarcane biorefineries. The results showed that pre-fermenting vinasse and molasses was imperative for maintaining efficient organic matter conversion into methane. This strategy provides an efficient approach to achieve year-round high-rate biogas production in sugarcane vinasse.
CHEMICAL ENGINEERING JOURNAL
(2023)