The disclosed principles employ a UV reactor design for photo-based treatment of contaminated fluid media using a concentric single light sourcesingle sleeve design, with multiple such concentric light sourcesleeve units placed in parallel. The agricultural blend includes a slag by-product from a process having a slag other than stainless steel slag or includes 11 atomic % silicon from a soluble compound and total silicon of less than about 30 atomic % silicon or greater than about 39 atomic % silicon. When assignment is decided as necessary, the host processing device is notified of such via the communication means, and the host processing device newly assigns an alias device to the base device when there is the notification from the storage control device. The program stored in the above storage unit includes one or more data processing instructions giving an execution direction to the operation unit. The cathode off gas is supplied to the gas flow passage. Spacer particles are randomly located in the device region to prevent a cap mounted on the substrate from contacting the active components, thereby protecting them from damage.