Geological Engineering: Proceedings of the 1st International Conference (ICGE 2007)
212 Effects of SDI Filtration on Wastewater Quality for Irrigation
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In order to assess SDI system application in the condition of wastewater reuse, three treatments with three replications were designed. These treatments included check treatment with drinking water (CH), surface drip irrigation with wastewater (DI) and subsurface drip irrigation with wastewater (SDI). In addition, before pipeline, a SDI filtration was designed to improve biological index of wastewater. The results of this research showed that the BOD5, TSS and nitrogen component decreased during the filtration acceptably. But the microbiological factors didn't improve completely. In this condition, injection of wastewater below the soil surface (SDI system) could decrease the surface microbiological pollution significantly as compared to CH. In conclusion, the SDI system recommended in the wastewater reuse condition and application of new system of drilling considered for installing, monitoring and maintenance of SDI.