The supercritical water gasification (SCWG) and carbon dioxide of agro-industrial urban waste residues—Coffee Husk, Eucalyptus Biochar, Energy Sugarcane, Refuse-Derived Fuel (RDF)—were studied using TeS® v.2 software, which employs a non-stoichiometric thermodynamic model to minimize Gibbs free energy predict equilibrium compositions. effects temperature (873.15–1273.15 K), pressure (220–260 bar), biomass feed (18–69%), gasifying agents on hydrogen methane formation were analyzed. Higher...

The purpose of the present study was to investigate possible methods enhance rate aerobic biodegradation hydrocarbons (ex-situ treatments). In this work, bioremediation processes were applied a sandy soil with high level contamination originated from leakage diesel oil underground storage tank at petrol station. Laboratory scale experiments (Bartha biometer flasks) used evaluate oil. Enhancement carried out through biostimulation (addition nitrogen and phosphorus solutions or Tween 80...

The techno-economics of greenfield projects a first-generation sugarcane biorefinery aimed to produce ethanol, sugar, power, and n-butanol was conducted taking into account different butanol fermentation technologies (regular microorganism mutant strain with improved yield) market scenarios (chemicals automotive fuel). complete the batch acetone-butanol-ethanol (ABE) process simulated using Aspen Plus®. designed 2 million tonne per year utilize 25%, 50%, 25% available juice butanol,...

Abstract Simultaneous acetone butanol ethanol (ABE) fermentation by Clostridium beijerinckii P260 and in situ product recovery was investigated using a vacuum process operated two modes: continuous intermittent. Integrated batch fermentations ABE were conducted at 37°C 14‐L bioreactor (7.0 L volume) containing initial substrate (glucose) concentration of 60 g/L. The connected series with condensation system pump. Vacuum applied continuously or intermittently 1.5 h sessions separated 4, 6, 8...

Abstract Ethyl levulinate is a diesel additive that has received special attention recently due to its potential for production in large quantities from inexpensive feedstocks. Several processes have been developed the conversion of biomass into levulinic acid and ethyl levulinate, an economic analysis these routes would indicate main hindering factors their commercialization. This Review focuses on filling this gap current knowledge by gathering data scientific papers patents create...

This paper presents the techno-economics of greenfield projects an integrated first and second-generation sugarcane biorefinery in which pentose sugars obtained from biomass are used either for biogas (consumed internally power boiler) or n-butanol production via ABE batch fermentation process. The complete was simulated using Aspen Plus®. Although pentoses stream available gives room a relatively small biobutanol plant (7.1-12 thousand tonnes per year), introduction butanol acetone to...

Acetone–butanol–ethanol (ABE) facilities have traditionally presented unattractive economics because of the large energy consumption during recovery products from a dilute fermentation broth (∼13 g/L butanol). This problem results high toxicity butanol to microorganisms that catalyze its production. Flash is continuous system with integrated product recovery. The bioreactor operated at atmospheric pressure and circulated in closed loop vacuum chamber where ABE continuously boiled off 37 °C...

Abstract BACKGROUND: Butanol fermentation is product limiting owing to butanol toxicity microbial cells. (boiling point: 118 °C) boils at a higher temperature than water 100 and application of vacuum technology integrated acetone–butanol–ethanol (ABE) recovery may have been ignored because direct comparison boiling points butanol. This research investigated simultaneous ABE using Clostridium beijerinckii 8052 in situ by vacuum. To facilitate mass transfer temperature, batch was conducted...

Adriano Pinto Mariano, Daniel Marcos Bonotto, Dejanira de Franceschi Angelis, Maria Paula Santos Pirollo, Jonas Contiero Universidade Estadual Paulista-UNESP Instituto Geociencias e Ciencias Exatas (IGCE) Av. 24-A, 1515 CP 178 CEP 13506-900 Rio Claro-SP, email: adrianomariano@yahoo.com.br Departamento Bioquimica Microbiologia Biociencias (IB) 199 Claro SP.

Abstract Decarbonizing the energy sector through biomass use entails risks and uncertainties linked to implementing early stage technologies. To address this issue, work presents a panel‐based multicriteria decision‐making (MCDM) framework for corn‐ethanol plant seeking reduce its carbon footprint while investing in new bioenergy products. Six technology pathways were considered including gasification technologies, pyrolysis, hydrothermal liquefaction, alcohol jet, with products such as...

This work aimed to evaluate the capability of different microorganisms degrade commercial diesel oil in comparison a weathered collected from groundwater at petrol station. Two microbiological methods were used for biodegradability assessment: technique based on redox indicator 2,6 -dichlorophenol indophenol (DCPIP) and soil respirometric experiments using biometer flasks. In former we tested bacterial cultures Staphylococcus hominis, Kocuria palustris, Pseudomonas aeruginosa LBI,...

The biodegradability of pure diesel and biodiesel blends with different proportions (2%(commercial); 5% 20%) was evaluated employing the respirometric method redox indicator 2,6-dichlorophenol indophenol (DCPIP) test. In former, experiments simulating contamination natural environments (soil from a petrol station or water river) were carried out in Bartha biometer flasks (250 ml), used to measure microbial CO2 production. With DCPIP test, capability three inocula biodegrade tested. Results...

Pseudomonas aeruginosa LBI (Industrial Biotechnology Laboratory) was isolated from hydrocarbon-contaminated soil as a potential producer of biosurfactant and evaluated for hydrocarbon biodegradation. The emulsifying power stability the product assessed in laboratory, simulating water contamination with benzene, toluene, kerosene, diesel oil crude at various concentrations.Bacteria were grown 30 degrees C shaken 200 rpm 168 h, three repetitions. Surface tension, pH observed cell-free broth...

This work is aimed to assess the aerobic biodegradation of biodiesel/diesel blends (0, 2, 5, 20 and 100%, v/v) by Candida viswanathii. The potential inoculum was assessed with redox indicator 2,6-dichlorophenol indophenol (DCPIP) test with  respirometric experiment in biometer flasks (250 mL) used measure microbial CO2 production. In latter, added a contaminated soil (addition 50 mL fuel/Kg from noncontaminated site). C. viswanathii able increase significantly (approximately 50% terms...

This study aimed the optimization of culture condition and composition for production Cryptococcus laurentii 11 biomass lipids in cheese whey medium supplemented with sugarcane molasses. The pH, fermentation time, molasses concentration according to a full factorial statistical experimental design was followed by Plackett-Burman design, which used determine whether supplementation yeast extract inorganic salts could provide further enhancement production. following conditions were found...

Worldwide, there are various feedstocks such as straws, corn stover, sugarcane bagasse, sweet sorghum bagasse (SSB), grasses, leaves, whey permeate, household organic waste, and food waste (FW) that can be converted to valuable biofuels butanol. For the present studies, an economic analysis was performed compare butanol production from three (SSB; FW; yellow top presscake, YTP or YT) using a standard process advanced integrated design. The total plant capacity set at 170,000–171,000 metric...

This work assessed the economics and carbon footprint of alcohol (ethanol vs. n-butanol)-to-jet fuel production using eucalyptus for feedstock. Considering a risk-mitigating strategy investing first in plant (organosolv pretreatment, enzymatic hydrolysis, fermentation) waiting five years until second investment (alcohol-to-jet plant), minimum jet selling price was similar both ethanol butanol cases (2.10 2.08 US$/l 20% Internal Rate Return, IRR). In contrast, according to stochastic...