W. Aufhammer et al., SUITABILITY OF GRAIN OF WHEAT AND TRITICA LE FOR BIOETHANOL PRODUCTION AS DEPENDENT ON THE PROCESSING DATE AFTER MATURITY, Die Bodenkultur, 45(2), 1994, pp. 177-187
The suitability of grains of winter wheat and winter triticale for bio
ethanol production as dependent on the processing date after maturity
was investigated. Furthermore the correlation between falling number a
nd the suitability of grains for autoamylolytic processing was checked
. Grain material sets of two cultivars per species from two field tria
ls were used. Species and cultivars were chosen on account of high gra
in yields per ha and high native enzyme activities. Partly including h
arvesting dates, grain sets were investigated 2 to 11 months after mat
urity Under addition (+e) and without an addition (-e) of technical en
zymes the bioethanol output per unit of dry matter (1/dt) was analyzed
. Additionally the falling numbers were determined. The output results
allowed the calculation of the autoamylolytic quotient. Based on grai
n yields (dt/ha) bioethanol yields (1/ha) were calculated. Related to
increasing periods between maturity and processing under addition of t
echnical enzymes and particularly without technical enzymes the bioeth
anol output raised cultivar specifically The bioethanol surplus amount
ed up to 1.11 (+e) and up to 9.6 I/dt dry matter (-e) respectively. Th
e bioethanol yields (1/ha) were reduced by cultivar specific trends ac
cording to yield depression at a delayed harvest time. Presumably the
yield depression referred to grain shattering. A forecast of the autoa
mylolytic processing suitability by the falling numbers of the investi
gated grain sets proved to be doubtful. Effects of storage conditions
on the suitability for processing need further investigations.