Recirculating water treatment technologies for closed-cycle plant growth systems - the SPF treatment system.

摘要

The SPF (Specific Pathogen Free) is a closed-cycle water treatment technique for biological systems that removes unwanted compounds from the nutrient solution, delivers required compounds to the root zone, and controls potentially harmful microorganisms. The benefits of this technique are resource recovery, elimination of discharges into the environment, and protection against root diseases and build up of phytotoxic contaminants. The growing systems suitable for use with the SPF technique, and thevarious processes involved in SPF water treatment are discussed.