An apparatus for drying and conveying a material includes a vibratory fluid bed dryer having a perforated drying deck on which material is deposited, said fluid bed dryer including a vibratory drive system capable of imparting a variable angle vibratory force to the deck. A flash dryer is also provided, having a fan and heater for supplying hot air through the fluid bed dryer deck and a cyclone for collecting finished, dried material particles.

In order to capture and divert a significantly larger percentage of SCG generated on a daily basis, the present system, method and apparatus processes SCG right at the source of a bulk of SCG generation, namely the many tens of thousands of coffee shops around the world. In an aspect, there is provided a system, method, and apparatus for promptly dewatering collected SCG, and efficiently drying the SCG to a sufficiently low level of moisture content to stabilize the SCG for further processing. In an embodiment, the dewatered and dried SCG is collected within a predetermined number of hours for processing at a central processing facility, where the SCG is further processed into one or more high quality food grade ingredients for potential human consumption.

A recovery system for preparing magnesium sulfate from sulfuric acid waste solution is disclosed. The system comprises a reactor configured to remove hydrogen peroxide from the sulfuric acid waste solution and to promote a reaction between the sulfuric acid waste solution and a magnesium-based neutralizing agent to form a magnesium sulfate solution, a crystallization device configured to cool the magnesium sulfate solution and continuously crystallize magnesium sulfate crystals and a crystallization mother liquor, a dewatering device configured to separate the crystallization mother liquor from the magnesium sulfate crystals, and a drying device configured to obtain magnesium sulfate hydrates containing 0 to 7 molecules of crystalline water by controlling a drying temperature. A method for preparing magnesium sulfate using the recovery system is also disclosed.