Tag Archives: starch

695-704 M. Ahokas,, A.-L. Välimaa, T. Lötjönen, A. Kankaala, S. Taskilaand E. Virtanen
Resource assessment for potato biorefinery: Side stream potential in Northern Ostrobothnia
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Resource assessment for potato biorefinery: Side stream potential in Northern Ostrobothnia

M. Ahokas¹,³⋅*, A.-L. Välimaa¹, T. Lötjönen², A. Kankaala¹, S. Taskila³and E. Virtanen¹

¹MTT Agrifood Research Finland, Biotechnology and Food Research, P.O. Box 413, FI90014 University of Oulu, Oulu, Finland 2MTT Agrifood Research Finland, Plant Production Research, Tutkimusasemantie 15, FI92440 Ruukki, Finland 3University of Oulu, Chemical Process Engineering, P.O. Box 4300, FI90014 University of Oulu, Finland; *Correspondence: mikko.ahokas@oulu.fi

Abstract:

Potato industry side-streams consist of a significant amount of the original biomass. However, tightened demands of EU legislation together with the costs of side stream processing have forced potato industry towards more efficient use of the raw material. For this purpose, we have examined the possibility to recover main fractions from potato side streams, such as proteins, fibers and starch, and utilize them in a manner of biorefinery concept. The aim of the present research was to evaluate the potential for a potato biorefinery based on biomasses available at area of Northern Ostrobothnia, Finland. Study shows, that there is enough side-streams available to build a concept, which produces more value added products, like fibers and proteins. In this report, the main conclusions of the research are presented together with state-of-art on potato waste water processing technologies and current applications of their products.

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573-582 I. Jansone, S. Malecka and V. Miglane
Suitability of winter triticale varieties for bioethanol production in Latvia
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Suitability of winter triticale varieties for bioethanol production in Latvia

I. Jansone, S. Malecka and V. Miglane

State Stende Cereals Breeding Institute, p/o Dizstende, Talsi district, LV–3258 Latvia;e-mail: stende.selekcija@apollo.lv

Abstract:

The research was carried out at the State Stende Cereals Breeding Institute in experimental years 2007/08 and 2008/09. The subject of the research was the suitability of seven winter triticale varieties and lines for bioethanol production. Two supplementary fertilization rates of nitrogen were used (N 100 kg ha-1 and N 140 kg ha-1). The correlations of characteristics of different varieties were evaluated. During the research the analysis of grain quality (starch and crude protein content) was carried out. The theoretical bioethanol outcome (L t-1) and yield (L ha-1) were calculated by using the indicators of starch content. The results of the research show that the winter triticale variety ‘Dinaro’ and line 9402-3 with the highest theoretically calculated bioethanol outcome (489.4 L t-1 and 486.5 L t-1) and the highest starch content of the grains (681.19 g kg-1and 677.13 g kg-1) were the most suitable for the bioethanol production in Latvian conditions. No substantial effect of the fertilization methods on the starch content in grains and on the theoretically calculated ethanol outcome was observed.

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289-299 M. Järvan and L. Edesi
The effect of cultivation methods on the yield and biological quality of potato
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The effect of cultivation methods on the yield and biological quality of potato

M. Järvan and L. Edesi

Department of Plant Sciences, Estonian Research Institute of Agriculture, Teaduse St. 13,EE75501 Saku, Estonia; e-mail: malle.jarvan@eria.ee

Abstract:

The effect of organic and conventional methods on the yield and biological quality of potato in two field crop rotations was identified. The field trials were performed in Central-Estonia in Olustvere (58º 33΄ N, 25º 34΄ E) during two years and in North-Estonia in Saku (59º 18΄ N, 24º 39΄ E) during three years. In Olustvere the following cultivation methods were compared: organic I – without manure, organic II – with cattle manure (at the rate 60 t ha-1), and conventional (manure, mineral fertilizers and pesticides were used). In organic cultivation the fertilization with manure increased the potato yield on average 36.5%. At that, the dry matter content in tubers decreased and the nitrate content increased. In conventional farming the yield was 127% higher than in the variant organic II. In organic cultivation the tubers’ content of dry matter, starch and minerals was higher than in conventional cultivation. As to the content of reducing sugars, crude protein and nitrates no significant differences were found between the cultivation methods.In Saku, the yields and biochemical composition of potato were compared in trial areasfertilized with plant compost and mineral fertilizers. Equivalent rates of NPK to both trial variants were applied during three years. With compost the yield of potato was on average 32.1% lower than with mineral fertilizers. There were no significant differences in the effect of compost and mineral fertilizers on the biological quality of potato tubers.

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