SEPARATION OF BIOCOMPONENTS FROM DDGS

摘要

A multi stage process for the progressive removal of protein and isolating streams containing cellulose fibers and oil from a waste stream containing Dried Distillers Grains with Solubles is disclosed. Targeted polymers are added to the source and separated streams prior to passing the streams through separation equipment including a rotary screen, a multi disk press, a dissolved air floatation device and optionally a centrifuge in which the waste stream is separated into a stream containing predominantly protein, a stream containing predominantly oil and a stream that contains predominantly cellulose and hemicellulose fibers.

主权项

1. A multi-stage substantially continuous process for separating a source stream having a pH above 5.0, said stream intermixedly containing fibers, proteins and oil, said process being configured for separating the source stream into three streams each containing predominantly one component, said source stream containing dried distillers grains with solubles, said process comprising the stages of:
providing a first stream comprising dried distillers grain with solubles, said dried distillers grain stream containing water, oil, protein and fibers, said fibers containing hemicellulose and cellulose components; separating from the source stream a stream comprising predominantly proteins and oil in a water mixture form and a stream comprising predominantly fiber materials; separating a stream containing predominantly oil and a stream containing predominantly proteins from the water mixture; progressively concentrating the stream containing predominantly proteins in at least one additional step.