Optimisation of distillery co-products for poultry feed

SCHOLEY, D.V., 2012. Optimisation of distillery co-products for poultry feed. PhD, Nottingham Trent University.

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Abstract

EU legislation has led to an almost ten-fold increase in bioethanol production between 2003 and 2011. The current distillery co-product, distiller’s dried grains with solubles (DDGS), is fed primarily to cattle due to the high fibre content but differentiation of the co-product stream would allow penetration of the large monogastric feed sector. The aim of this project was to evaluate a novel separation process producing a high protein yeast protein concentrate (YPC) from DDGS, and assess the potential of this product as a feed ingredient for poultry. A pilot plant study modelling the process confirmed the variability of the stillage, but highlighted the viability of the process for ameliorating some of these differences. Inter-batch variability was reduced from 10% to 1.2% in terms of protein content but dry matter content still varied by more than 8%, due to fibre contamination. The batches of yeast cream with increased fibre content had significantly reduced drying rates, from 37.3mg/min to 23.6mg/min, due to the larger particle sizes included. Additionally, the increased range of particle size introduced by fibre contamination would lead to product separation with detrimental implications for transport and handling of the dried product. It is vital to have measurements of amino acid content and digestibility for any new feed ingredient to ensure accurate feed formulation.

Item Type: Thesis
Creators: Scholey, D.V.
Date: 2012
Rights: This work is the intellectual property of the author, Dawn Scholey, and the industrial sponsor AB Agri. You may copy up to 5% of this work for private study, or personal, non-commercial research. Any re-use of the information contained within this document should be fully referenced, quoting the author, title, university, degree level and pagination. Queries or requests for any other use, or if a more substantial copy is required, should be directed in the first instance to the owner(s) of the Intellectual Property Rights.
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: EPrints Services
Date Added: 09 Oct 2015 09:34
Last Modified: 24 Nov 2016 14:56
URI: http://irep.ntu.ac.uk/id/eprint/144

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