Urea is a semi-solid substance of low solubility, and requires little or no water for its excretion.
However, Andisols react strongly with phosphorus to form solid compounds of low solubility, often making this nutrient unavailable to plants.
Solids of the lowest density (that is, amber and lignite) were collected from the surface, while dense sediments settled to the bottom of the concrete mixer.
Once their short-term hydration is known, this paper deals with the modifications generated in the pore solutions and in the solid phases of low-pH cement pastes based on CAC after 2 years of hydration, observing a high stability of the solid phases formed in the short-term.
On the other hand, solid-state samples of low MW P3ATs often exhibit also a different packing structure (form II) [3, 6, 9], in which the distance between the nearest-neighbor backbones increases up to 4.4 Å due to tilted and interdigitated alkyl chains [2, 3, 12 14].
Further, practical investigations on increased substrate concentration in biogas and ethanol production, recycling of the liquid in anaerobic digestion and separation of low solids flows into solid and a liquid fraction for improved reactor applications deserves further attention.
Surface segregation of components in semi- and full interpenetrating networks based on cross-linked polyurethane, poly esteracrylate), poly(butyl methacrylate) and poly vinyl acetate) has been studied at the interfaces with solids of high and low free surface energy.
Further, the separation of low solids streams to a solid and liquid fraction for improved reactor application was shown to improve the process economy and deserves to be practically verified.
A previously developed mathematical model of low solids thermophilic simultaneous saccharification and fermentation (tSSF) with Avicel was unable to predict performance at high solids using a commercial cellulase preparation (Spezyme CP) and the high ethanol yield Thermoanaerobacterium saccharolyticum strain ALK2.
