Heat-constrained modelling of calcium sulphate reduction

Modelling of Bacterial Sulphate Reduction in Anaerobic Ponds: Kinetic Investigations

The aim of the study was first to develop a simple and practical model of anaerobic digestion including sulphate-reduction in anaerobic ponds. The basic microbiology of our model consists of three steps, namely, acidogenesis, methanogenesis, and sulphate reduction. This model includes multiple reaction stoichiometry and substrate utilization kinetics. The second aim was to determine some kineti...

Modelling of calcium sulphate solubility in concentrated multi-component sulphate solutions

The chemistry of several calcium sulphate systems was successfully modelled in multi-component acid-containing sulphate solutions using he mixed solvent electrolyte (MSE) model for calculating the mean activity coefficients of the electrolyte species. The modelling involved the tting of binary mean activity, heat capacity and solubility data, as well as ternary solubility data. The developed mo...

Photosynthetic Sulphate Reduction

Plants assimilate inorganic sulphate for the bio­ synthesis of sulphur containing compounds. The enzymes required for reduction are found pre­ dominantly in the plastids which provide the necessary energy and the reductants. Sulphate re­ duction like nitrate or carbon dioxide assimilation is endergonic; for comparison, N 0 3 reduction to ammonia requires +347 kJ mol1 and C 0 2 re­ duction +478 ...

Sulphate of Copper Lotion in Prickly Heat

Chemical Modelling of Calcium Sulphate Phase Equilibria in Multicomponent Electrolyte Solutions

A new database was developed to successfully model the solid and aqueous phase equilibria in a number of hydrometallurgical processes using the Mixed Solvent Electrolyte (MSE) model of the OLI Systems software. In order to validate the predictability of the model developed, a number of experimental measurements were conducted in multicomponent solutions containing NiSO4, H2SO4, MnSO4, HCl, etc....