Connect with us

Heartland

Effects of steam pretreatment and co-production with ethanol on the energy efficiency and process economics of combined biogas, heat and electricity production from industrial hemp

CONCLUSIONS: To reduce the production cost of ethanol and biogas from biomass, the use of feedstocks that are cheaper than hemp, give higher output of ethanol and biogas, or combined production with higher value products are primarily suggested. Further, practical investigations on increased substrate concentration in biogas and ethanol production, recycling of the liquid in anaerobic digestion and separation of low solids flows into solid and a liquid fraction for improved reactor applications…

Republished by Plato

Published

on

Background: The study presented here has used the commercial flow sheeting program Aspen Plus™ to evaluate techno-economic aspects of large-scale hemp-based processes for producing transportation fuels. The co-production of biogas, district heat and power from chopped and steam-pretreated hemp, and the co-production of ethanol, biogas, heat and power from steam-pretreated hemp were analysed. The analyses include assessments of heat demand, energy efficiency and process economics in terms of annual cash flows and minimum biogas and ethanol selling prices (MBSP and MESP).

Results: Producing biogas, heat and power from chopped hemp has the highest overall energy efficiency, 84% of the theoretical maximum (based on lower heating values), providing that the maximum capacity of district heat is delivered. The combined production of ethanol, biogas, heat and power has the highest energy efficiency (49%) if district heat is not produced. Neither the inclusion of steam pretreatment nor co-production with ethanol has a large impact on the MBSP. Ethanol is more expensive to produce than biogas is, but this is compensated for by its higher market price. None of the scenarios examined are economically viable, since the MBSP (EUR 103-128 per MWh) is higher than the market price of biogas (EUR 67 per MWh). The largest contribution to the cost is the cost of feedstock. Decreasing the retention time in the biogas process for low solids streams by partly replacing continuous stirred tank reactors by high-rate bioreactors decreases the MBSP. Also, recycling part of the liquid from the effluent from anaerobic digestion decreases the MBSP. The production and prices of methane and ethanol influence the process economics more than the production and prices of electricity and district heat.

Conclusions: To reduce the production cost of ethanol and biogas from biomass, the use of feedstocks that are cheaper than hemp, give higher output of ethanol and biogas, or combined production with higher value products are primarily suggested. Further, practical investigations on increased substrate concentration in biogas and ethanol production, recycling of the liquid in anaerobic digestion and separation of low solids flows into solid and a liquid fraction for improved reactor applications deserves further attention.

Source: https://pubmed.ncbi.nlm.nih.gov/23607263/?utm_source=no_user_agent&utm_medium=rss&utm_campaign=pubmed-2&utm_content=1XAOX_jnjTyCUo06Xbq0lslwi760CIxcWfQx0n9x5BPH5yV1sN&fc=20200804212910&ff=20200813083454&v=2.11.5

Heartland

Republished by Plato

Published

on

Source:

Continue Reading

Heartland

Republished by Plato

Published

on

Source:

Continue Reading

Heartland

Republished by Plato

Published

on

Source:

Continue Reading
Heartland3 days ago

Legal Status of CBD in Indiana?

Heartland5 days ago

Suspitcions on a CBD shop in my city

Heartland3 days ago

Germany Rejected Its Recreational Cannabis Bill

Heartland3 days ago

Germany Rejected Its Recreational Cannabis Bill

Heartland2 days ago

Lebanon Legalized Medical Cannabis, 1st in Arab World

Heartland3 days ago

Germany Rejected Its Recreational Cannabis Bill

Heartland4 days ago

Grado Labs Review – The Hemp Limited Edition Headphone

Heartland2 days ago

Lebanon Legalized Medical Cannabis, 1st in Arab World

Heartland2 days ago

Lebanon Legalized Medical Cannabis, 1st in Arab World

Metal5 days ago

Turkish metal producers’ foreign sales prices up 5.85% in Oct from Sept

Heartland4 days ago

Did Alex Trebek Run a CBD Oil Business?

Material3 days ago

Injection of H2-rich carbonaceous materials into the Blast furnace: devolatilization, gasification and combustion characteristics and effect of increased H2-H2O on iron ore pellets reducibility

Material5 days ago

Multifunctional Flexible and Stretchable Graphite-Silicone Rubber Composites

Material5 days ago

Morphological, structural, thermal properties of a native starch obtained from babassu mesocarp for food packaging application

Heartland4 days ago

In the weeds: Greg Atkinson navigates the changing markets for hemp products

Material3 days ago

Strain-induced precipitation in Ti microalloyed steel by two-stage controlled rolling process

Uncategorized4 days ago

European Court of Justice Rules CBD not a Narcotic

Heartland2 days ago

Mounce: Hemp in Mexico and Texas: Pot Luck?

Material3 days ago

Preparation, Structural and Microstructural Characterization of Ti-30NB-10ta-5ZR alloy for biomedical applications

News5 days ago

The Mexican Senate approves Cannabis Legalization

Heartland4 days ago

2020 Holiday Gift Guide: Stocking Sesh

Heartland4 days ago

Where can I smoke cbd?

Heartland2 days ago

CBD2 days ago

What Is CBD: The Complete Beginner’s Guide

Metal18 hours ago

RINL subsidiary BSLC seeks to make dolomite supplies to other steel mills

Heartland5 days ago

Global Widget and Hemp Bombs Participate in CBD Liver Study

Heartland5 days ago

New Zealand actor Sam Neil reveals he uses CBD oil to treat anxiety

Heartland5 days ago

Heartland4 days ago

I can’t get the cbd effect

Heartland4 days ago

HARBOR CITY’S 1500/mg ∆8 Tincture

Trending

A Cloud Nine Capital Entity Copyright © 2020 – All Rights Reserved Proudly Made in America