Wastewater minimization parameters

Apart from biocatalyst activity, several other parameters are important in development of a biodesulfurization process. These parameters include oil/water ratio, composition of aqueous phase used for biocatalyst suspension during desulfurization, biocatalyst loading, oil/water separation following completion of desulfurization, potential for biocatalyst recycle, recycle of aqueous phase to reduce fresh water usage and wastewater minimization, as well as secondary oil separation and purification operations. 

The comparison of the AOPs technologies is often made only in terms of efficiency in the removal of pollutants, but a more correct analysis should takes into account several parameters (i) safety of operations, (ii) manageability and applicability to the specific operations (for example, when small volume effluents dispersed over a wide territory, it may be preferable to transport the water treatment unit instead rather than to collect all wastewater in a single central treatment unit), (iii) technical effectiveness using real streams, (iv) absence of necessity of post-treatments (to eliminate some residual compounds, even in traces, or metal ions), (v) secondary pollution prevention, (vi) minimal toxicity of... 

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