Retting mill - the efficient machine for disintegration of wibrous biomass

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00230319" target="_blank" >RIV/68407700:21220/15:00230319 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.5071/23rdEUBCE2015-2DV.1.67" target="_blank" >http://dx.doi.org/10.5071/23rdEUBCE2015-2DV.1.67</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5071/23rdEUBCE2015-2DV.1.67" target="_blank" >10.5071/23rdEUBCE2015-2DV.1.67</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Retting mill - the efficient machine for disintegration of wibrous biomass

Popis výsledku v původním jazyce

There is nowadays a problem to comminute wet fibrous biomass like agriculture and forestry wastes in biotechnologies. Colloid mills or extruders are used in these applications to disintegrate wet material, i.e. with a moisture over 20 % wt. The major disadvantage of these machines are high energy requirement, being in hundreds or thousands kWh per ton of dry mass, and milling in process cycles. There was therefore an effort to design a new type of grinder that is able to continually mill wet fibrous biomass under minimum energy demand. The new prototype of grinder was developed. Its grinding principle is based on roll-plate grind system equipped with sharp-edged segments. The test experiments with wet wheat straw showed that energy demand to comminute particles from 200 mm to 10 mm was equal to 50 kWh.t-1 TS, all in continual mode of operation. The subsequent biogas test showed an increase in methane yield by 25 %. Based on energy-economic balance of the process, it was observed that the implementation of retting mill to currently-operating biogas plants decreases specific power for batch mixing by 70 %, increases its net profit by 14 % and simple payback time of size reduction technology with implemented retting mill to nowadays operating biogas plants is 5.6 years.

Název v anglickém jazyce

Retting mill - the efficient machine for disintegration of wibrous biomass

Popis výsledku anglicky

There is nowadays a problem to comminute wet fibrous biomass like agriculture and forestry wastes in biotechnologies. Colloid mills or extruders are used in these applications to disintegrate wet material, i.e. with a moisture over 20 % wt. The major disadvantage of these machines are high energy requirement, being in hundreds or thousands kWh per ton of dry mass, and milling in process cycles. There was therefore an effort to design a new type of grinder that is able to continually mill wet fibrous biomass under minimum energy demand. The new prototype of grinder was developed. Its grinding principle is based on roll-plate grind system equipped with sharp-edged segments. The test experiments with wet wheat straw showed that energy demand to comminute particles from 200 mm to 10 mm was equal to 50 kWh.t-1 TS, all in continual mode of operation. The subsequent biogas test showed an increase in methane yield by 25 %. Based on energy-economic balance of the process, it was observed that the implementation of retting mill to currently-operating biogas plants decreases specific power for batch mixing by 70 %, increases its net profit by 14 % and simple payback time of size reduction technology with implemented retting mill to nowadays operating biogas plants is 5.6 years.

Druh

D - Stať ve sborníku

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

23rd European Biomass Conference and Exhibition Proceedings

ISBN

978-88-89407-51-6

ISSN

2282-5819

e-ISSN

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Počet stran výsledku

5

Strana od-do

-1

Název nakladatele

ETA - Florence

Místo vydání

Florencie

Místo konání akce

Vienna

Datum konání akce

1. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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