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Archives of Industrial Hygiene and Toxicology

The Journal of Institute for Medical Research and Occupational Health

4 Issues per year


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0004-1254
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Volume 62, Issue 3 (Sep 2011)

Issues

High-Risk Biodegradable Waste Processing By Alkaline Hydrolysis

Sanja Kalambura / Neven Voća / Tajana Krička / Zoran Šindrak / Ana Špehar / Dejan Kalambura
Published Online: 2011-10-04 | DOI: https://doi.org/10.2478/10004-1254-62-2011-2104

High-Risk Biodegradable Waste Processing By Alkaline Hydrolysis

Biodegradable waste is by definition degraded by other living organisms. Every day, meat industry produces large amounts of a specific type of biodegradable waste called slaughterhouse waste. Traditionally in Europe, this waste is recycled in rendering plants which produce meat and bone meal and fat. However, feeding animals with meat and bone meal has been banned since the outbreaks of bovine spongiform encephalopathy (BSE). In consequence, new slaughterhouse waste processing technologies have been developed, and animal wastes have now been used for energy production. Certain parts of this waste, such as brains and spinal cord, are deemed high-risk substances, because they may be infected with prions. Their treatment is therefore possible only in strictly controlled conditions. One of the methods which seems to bear acceptable health risk is alkaline hydrolysis. This paper presents the results of an alkaline hydrolysis efficiency study. It also proposes reuse of the obtained material as organic fertiliser, as is suggested by the analytical comparison between meat and bone meal and hydrolysate.

Oporaba visokorizičnog biorazgradivog otpada metodom alkalne hidrolize

Biorazgradivi otpad definira se kao otpad koji razgrađuju živi organizmi. Klaonice i mesna industrija proizvode na dnevnoj bazi velike količine specifičnoga biorazgradivog otpada poznatog kao otpad životinjskog podrijetla. Tradicionalno se u Europi taj otpad reciklira u kafilerijama, pri čemu se proizvode mesno-koštano brašno i mast. No nakon pojave goveđe spongiformne encefalopatije (GSE) zabranjena je prehrana životinja mesno-koštanim brašnom. U potrazi za novim mogućnostima zbrinjavanja otpada životinjskog podrijetla razvijene su nove tehnologije oporabe i omogućena upotreba takvog otpada u energetske svrhe. Određeni dijelovi otpada životinjskog podrijetla, mozak i leđna moždina, pripadaju kategoriji visokorizičnog otpada zbog velike mogućnosti postojanja priona u njima. Njihova oporaba stoga je moguća samo u strogo kontroliranim uvjetima. Jedna od metoda koja se smatra prikladnom za oporabu visokorizičnih otpada jest metoda alkalne hidrolize. U radu su prikazani rezultati analiza mesno-koštanog brašna i hidroliziranog otpada te njegova uporaba kao organskoga gnojiva.

Keywords: cow brain; BSE; organic fertilisers; slaughterhouse waste; rendering plants; spinal Cord

Keywords: kafilerije; klaonički otpad; kravlji mozak; leđna moždina; organsko gnojivo

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About the article


Published Online: 2011-10-04

Published in Print: 2011-09-01


Citation Information: Archives of Industrial Hygiene and Toxicology, ISSN (Print) 0004-1254, DOI: https://doi.org/10.2478/10004-1254-62-2011-2104.

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