PERFORMANCE CHARACTERISTICS OF A PILOT PLANT OF GRAVEL BED HYDROPONIC SYSTEM (GBH) | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 9, Volume 29, Issue 12, December 2004, Page 7625-7640 PDF (4.53 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2004.243944 | ||||
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| Authors | ||||
| M. El-Housseini,1; Sohier S. Fahmy1; A. F. El- Hmahmy2 | ||||
| 1Soils, Water and Environ. Res. Institute, ARC, Giza, Egypt | ||||
| 2Agric. Botany Dept., Agric. Fac., AI·Azhar Univ. | ||||
| Abstract | ||||
| Artificial wetlands are low cost-technology wastewater treatment system and could be introduced as secondary or tertiary step in the treatment system. To study the performance characteristics of these systems, Two Gravel Bed Hydroponic pilot- scale systems (GBH) were made of iron sheets (4mm thickness) with dimension of 4m long, 30cm width and 40cm high, provided with three tapes for controlling inlet flow, effluent drain and system sewage depth (SO). Both units were lined with bitumen; filled with gravel aggregates, cultivated with papyrus rhizomes and irrigated for two month with tap water for plant growth and system establishment. The SO of the first and the second systems were designed to operate at 10 and 20 cm sewage depth (SO), respectively. After this period, both GBH models were fed with primary treated wastewater from Zenien wastewater treatment plant in a batch mode. Removal efficiencies of SS, COD, BOD, nitrogen forms and indicator microorganisms under different retention times of 4, 8, 12, 16 and 24 hrs were studied. Results were deeply discussed. | ||||
| Keywords | ||||
| Hydroponic system (GBH); destruction pathogenic bacteria; coliform bacteria; Biochemical oxygen demand (BOD); chemical oxygen demand (COD) | ||||
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