Catalytic hydrothermal liquefaction of microalgae cultivated in wastewater: Influence of ozone-air flotation on products, energy balance and carbon footprint

2021 ◽  
Vol 249 ◽  
pp. 114806
Author(s):  
I. Nava-Bravo ◽  
S.B. Velasquez-Orta ◽  
I. Monje-Ramírez ◽  
L.P. Güereca ◽  
A.P. Harvey ◽  
...  
Keyword(s):  
Energy Balance ◽  
Carbon Footprint ◽  
Hydrothermal Liquefaction ◽  
Air Flotation

Investigating energy balance and carbon footprint in saffron cultivation – a case study in Iran

2016 ◽  
Vol 115 ◽  
pp. 162-171 ◽  
Author(s):  
Majid Khanali ◽  
Mehran Movahedi ◽  
Marziye Yousefi ◽  
Sanaz Jahangiri ◽  
Benyamin Khoshnevisan
Keyword(s):  
Energy Balance ◽  
Carbon Footprint

<i>Hydrothermal Liquefaction of Food Waste: Bio-crude oil Characterization, Mass and Energy Balance</i>

2019 ◽  
Author(s):  
Hengameh Bayat ◽  
Feng Cheng ◽  
Mostafa Dehghanizadeh ◽  
Nicholas Soliz ◽  
Catherine E Brewer ◽  
...  
Keyword(s):  
Energy Balance ◽  
Crude Oil ◽  
Food Waste ◽  
Hydrothermal Liquefaction ◽  
Oil Characterization

scholarly journals Relação energética e emissão de GEE do biodiesel de pinhão manso: análise sob uma perspectiva dinâmica

2015 ◽  
Vol 1 (2) ◽  
pp. 79-89
Author(s):  
Elivaldo Lozer Fracalossi Ribeiro ◽  
Henrique Leonardo Maranduba ◽  
Luziléa Brito Oliveira ◽  
José Adolfo De Almeida Neto ◽  
Francisco Bruno Souza Oliveira
Keyword(s):  
Energy Balance ◽  
Carbon Footprint ◽  
Castor Bean ◽  
Relevant Information ◽  
Jatropha Oil ◽  
Production Chain ◽  
Oil Supply ◽  
Search Results ◽  
Low Emission ◽  
The Creation

Considering the current conditions of fuel, the objective of this study was to evaluate the energy balance and Carbon Footprint of biodiesel from jatropha oil, considering the dynamism of the production chain. For this, after the creation of the dynamic outline, based on the linear idea, the system is divided into subsystems and the data were analyzed by means of Ecoinvent and PAS databases. Then, the activities of each subsystem were listed and had relevant information to obtain the search results. The results reinforce the potential of Jatropha biodiesel, illustrated by low emission compared to soy and castor bean biodiesel. As for the energy balance, Jatropha has a favorable relationship with respect to castor and rapeseed, with disadvantage compared to soybeans. Thus, the jatropha has shown interesting results compared with some alternative, and as it is an inevitable replacement, given the decline in oil supply, this oilseed prove increasingly promising.

Energy balance and carbon footprint of very large‐scale photovoltaic power plant

2021 ◽  
Author(s):  
Marlon Caires Pamponet ◽  
Henrique Leonardo Maranduba ◽  
José Adolfo Almeida Neto ◽  
Luciano Brito Rodrigues
Keyword(s):  
Energy Balance ◽  
Power Plant ◽  
Carbon Footprint ◽  
Large Scale ◽  
Photovoltaic Power

scholarly journals Method of Estimating the Carbon Footprint of Wastewater Treatment Plants

2021 ◽  
Vol 9 (1) ◽  
pp. 30
Author(s):  
Ewa Szatyłowicz ◽  
Iwona Skoczko ◽  
Paweł Puzowski
Keyword(s):  
Wastewater Treatment ◽  
Energy Balance ◽  
Carbon Footprint ◽  
Energy Demand ◽  
Wastewater Treatment Plants ◽  
Negative Energy ◽  
Positive Energy ◽  
Positive Energy Balance ◽  
External Sources ◽  
Balance Energy

Wastewater treatment operations focus on removing pollutants from wastewater to meet water quality standards for public health and environmental protection. However, in recent decades new sustainability targets for wastewater treatment plants have been postulated and implemented, which assume that energy is one of the key elements. Therefore, a transition from a negative energy balance (energy demand covered by external sources) to an energy-neutral or unevenly positive energy balance of wastewater treatment has been postulated. The carbon footprint (CF) is a new measure of sustainability in the wastewater sector for determining the overall impact of wastewater treatment plants on climate change. The following paper presents a method for estimating and assessing the carbon footprint of wastewater treatment plants.

scholarly journals Energy production from microalgae biomass: carbon footprint and energy balance

2015 ◽  
Vol 96 ◽  
pp. 493-500 ◽  
Author(s):  
Diego Lima Medeiros ◽  
Emerson A. Sales ◽  
Asher Kiperstok
Keyword(s):  
Energy Balance ◽  
Carbon Footprint ◽  
Energy Production ◽  
Biomass Carbon ◽  
Microalgae Biomass

scholarly journals Prognostic Assessment of the Viability of Hydrothermal Liquefaction as a Post-Resource Recovery Step after Enhanced Biomethane Generation Using Co-Digestion Technologies

2018 ◽  
Vol 8 (11) ◽  
pp. 2290 ◽  
Author(s):  
Oseweuba Okoro ◽  
Zhifa Sun ◽  
John Birch
Keyword(s):  
Environmental Sustainability ◽  
Resource Recovery ◽  
Hydrothermal Liquefaction ◽  
Integrated System ◽  
Meat Processing ◽  
Volatile Solid ◽  
Dissolved Air Flotation ◽  
Biomethane Potential ◽  
Air Flotation ◽  
Dissolved Air

In line with global efforts at encouraging paradigm transitions from waste disposal to resource recovery, the anaerobic co-digestion of substrates of wet hydrolyzed meat processing dissolved air flotation sludge and meat processing stock yard waste was investigated in the present study. It was demonstrated that the co-digestion of these substrates leads to the introduction of co-digestion synergizing effects. This study assessed biomethane potentials of the co-digestion of different substrate mixtures, with the preferred substrate mixture composed of stockyard waste and wet hydrolyzed meat processing dissolved air flotation sludge, present in a 4:1 ratio on a volatile solid mass basis. This co-digestion substrate mix ratio presented an experimentally determined cumulative biomethane potential of 264.13 mL/gVSadded (volatile solid). The experimentally determined cumulative biomethane potential was greater than the predicted maximum cumulative biomethane potential of 148.4 mL/gVSadded, anticipated from a similar substrate mixture if synergizing effects were non-existent. The viability of integrating a downstream hydrothermal liquefaction processing of the digestate residue from the co-digestion process, for enhanced resource recovery, was also initially assessed. Assessments were undertaken via the theoretical based estimation of the yields of useful products of biocrude and biochar obtainable from the hydrothermal liquefaction processing of the digestate residue. The environmental sustainability of the proposed integrated system of anaerobic digestion and hydrothermal liquefaction technologies was also initially assessed. The opportunity for secondary resource recovery from the digestate, via the employment of the hydrothermal liquefaction process and the dependence of the environmental sustainability of the integrated system on the moisture content of the digestate, were established. It is anticipated that the results of this study will constitute an invaluable basis for the future large-scale implementation of the proposed integrated system for enhanced value extraction from organic waste streams.

Effects of Ambipolar Diffusion on Prominence Thread Models

1994 ◽  
Vol 144 ◽  
pp. 315-321 ◽  
Author(s):  
M. G. Rovira ◽  
J. M. Fontenla ◽  
J.-C. Vial ◽  
P. Gouttebroze
Keyword(s):  
Energy Balance ◽  
Transition Region ◽  
Ambipolar Diffusion ◽  
Line Profiles ◽  
Balance Equations ◽  
Model Calculations ◽  
Partial Frequency ◽  
Frequency Redistribution ◽  
Partial Frequency Redistribution ◽  
Theoretical Structure

AbstractWe have improved previous model calculations of the prominence-corona transition region including the effect of the ambipolar diffusion in the statistical equilibrium and energy balance equations. We show its influence on the different parameters that characterize the resulting prominence theoretical structure. We take into account the effect of the partial frequency redistribution (PRD) in the line profiles and total intensities calculations.

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