Effects of growth substrate and partial removal of nucleic acids in the production of bacterial protein meal on amino acid profile and digestibility in mink

A Skrede,M Øverland,L Mydland

doi:10.22358/jafs/66442/2009

Abstract

Effects of growth substrate and partial removal of nucleic acids in the production of bacterial protein meal on amino acid profile and digestibility in mink

Highlights

BioProtein® is a bacterial protein meal (BPM) grown by continuous aerobe fermentation of natural gas (>90% methane)
Three types of bacterial protein meal (BPM) produced by aerobe bacteria fermentation with mainly M. capsulatus (Bath) were produced by Norferm Danmark A/S, Odense (Denmark): type BPMG was grown on natural gas in a pilot scale fermentor, type BPMM was grown on methanol in a laboratory scale fermentor, and type BPMM-NAR was grown on methanol and subsequently nucleic acid reduced using heat shock at 90oC and activation of endogenous nucleases (Larsen and Joergensen, 1996)
The method used for reduction of nucleic acid contents to produce BPMM-NAR appeared to reduce ash levels in addition to reducing the DNA and RNA to about 1/3 of the levels in BPMM

Summary

Introduction

BioProtein® is a bacterial protein meal (BPM) grown by continuous aerobe fermentation of natural gas (>90% methane). The present work aimed at studying the effects of growth substrate in BPM production and partial removal of nucleic acids on amino acid composition and digestibility in mink as a model animal species. Three types of bacterial protein meal (BPM) produced by aerobe bacteria fermentation with mainly M. capsulatus (Bath) were produced by Norferm Danmark A/S, Odense (Denmark): type BPMG was grown on natural gas in a pilot scale fermentor, type BPMM was grown on methanol in a laboratory scale fermentor, and type BPMM-NAR was grown on methanol and subsequently nucleic acid reduced using heat shock at 90oC and activation of endogenous nucleases (Larsen and Joergensen, 1996).

Results

Conclusion