Solid state fermentation moisture

In countries where a strong environmental regulation for industrial wastewater exists, purification of waste streams from potato factories regarding both the fruit water and the pulp is required. Several attempts have been made to dehydrate the by-products and to utilize them for different purposes. Its high moisture content (80%) requires an expensive drying due to the problem of spoilage, if left untreated. The starch industry tries to sell as much pulp as possible as wet or partially dried cattle feed. However, the need for potato pulp by farmers is limited. Potato pulp is being used as cattle feed as well as a solid-state fermentation media for the production of different biomolecules. Conventional applications of potato pulp are listed in Table 16.2. 

Effect of Temperature, Moisture, and Carbon Supplementation on Lipase Production by Solid-State Fermentation of Soy Cake by Penicillium simplicissimum... 

Index Entries Solid-state fermentation lipase Penicillium, soy cake olive oil moisture. 

A solid-state fermentation process for the production of ethanol from apple pomace by Saccharomyces cerevisiae was described by Khosravi and Shojaosadati (2003). A moisture content of 75% (wt/wt), an initial sugar concentration of 26% (wt/wt), and a nitrogen content of 1 % (wt/wt) were the conditions used to obtain 2.5% (wt/wt) ethanol without saccharification and 8% (wt/wt) with saccharification. The results indicate that... 

Protease Production Profile by Solid-State Fermentation Mediums containing 10 g of wheat bran hydrated with 15 mL of nutrient solution, to approximately 60% moisture, were sterilized (I20°C/40 min) in 250-mL Erlenmeyer flasks. The mediums were inoculated with mycelial suspension ftom each fungus and cultivated at 45°C for 8 days. Samples were taken every 24 h. The crude enzyme solution was obtained by adding 25 mL of water to the fermented material. Solids were removed by filtering through Whatman no. I filter paper and centrifuging at 10,000 rpm/20 min, and finally, the clear solution was assayed. 

Solid State Fermentation" (SSF) is defined as a process whereby an Insoluble substrate is fermented with sufficient moisture, but without free water. In the liquid state or slurry state fermentation, on the other hand, the substrate is solubilized or suspended as fine particles in a large volume of water. In most liquid state fermentations (LSF) or submerged fermentations substrate concentrations ranging from 0.5 to 5Z are used. Now, in a number of fermentations the concentration of the substrate has gone up to 10% to Increase the productivity per unit time. 

The objective is to allow a solid-state fermentation (SSF) of the cooked soya beans with filamentous fimgi. However, the moisture content of the cooked soya beans is rather high for fungal SSF, and soya beans also lack fermentable carbohydrate that could serve as a source of carbon for fungi. 

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