|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 17 van 19 gevonden artikelen
| Titel: |
Treatment efficiency of a vertical-flow reed bed with recirculation |
| Auteur: |
Bahlo, Klaus |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 35 (2000) nr. 8 pagina's 1403-1413 |
| Jaar: |
2000-09 |
| Inhoud: |
A technical reed bed treatment system (RBTS) with vertical-flow (VF), which was filled with medium-grain sand and planted with reed (Phragmites australis), was intermittently charged with domestic wastewater of 29 pe (population equivalents) at a surface flow rate of 23.3 L/m2-d. At effluent temperatures of between 4.7 and 18.0°C, a COD (BOD5) mass loading rate of 11.7 (6.4) g/m2-d sewage was degraded to effluent concentrations of <15-28 (<2-7) mg/L. Average COD (BOD5) elimination accounted for 94 (98) %. At effluent temperatures >6°C (April-Dec), the applied mean nitrogen load of 1.9 g NH4+-N/m2.d was nitrified to leave < 1.0 mg/L NH4+-N in the effluent (mean influent concentration: 79.6 mg/L NH4-N). Simultaneous denitrification in the VF removed 23% of the nitrogen input. Due to an unfavourable NH4+-N/BOD5 inlet ratio of 0.30 Nanorg., the removal rate only increased to 41% by recirculating effluent water into the inlet at a ratio of 1.1. Depending on the purification grade required, loading rates of 20-50 L/m2-d and areas of 3-6 m2/pe are recommended for dimensioning VF. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 17 van 19 gevonden artikelen
| << vorige | volgende >> |