Investigating Biomass Formations at Different Depths in a Slow Sand Filter

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Manav Demir N., Atçı E. B., Demir S., Karadeniz A.

POLISH JOURNAL OF ENVIRONMENTAL STUDIES, cilt.27, ss.1463-1474, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27
  • Basım Tarihi: 2018
  • Doi Numarası: 10.15244/pjoes/76793
  • Dergi Adı: POLISH JOURNAL OF ENVIRONMENTAL STUDIES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1463-1474
  • Anahtar Kelimeler: slow sand filter, iron-manganese removal, biomass formation, headloss, hydraulic conductivity, DETERMINISTIC-BASED MODEL, MICROBIAL-POPULATIONS, SIMULTANEOUS REMOVAL, SECONDARY EFFLUENT, GENETIC DIVERSITY, FILTRATION, MANGANESE, IRON, PERFORMANCE, GROUNDWATER
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

A laboratory-scale slow sand filtration (SSF) system was used to investigate biomass formation in different depths of SSF depending on various operating conditions in regard to filtration rate and influent iron-manganese concentrations. Results suggest that biomass formation occurs mainly in the uppermost 1.5 cm of the filter bed with slight contributions from layers between 1.5 cm and 14.5 cm. The highest volatile solids (VS) accumulation was observed in the uppermost layer as 16.93 +/- 0.07 mgVS/g dry sand, and the accumulation was found to be a function of both filtration rate and influent iron-manganese concentrations. Hydraulic conductivities were tested as a measure of biomass formation. The highest initial value of hydraulic conductivity was measured as 13.7 mu m/s, while the lowest values ranged from 3.28 to 6.62 mu m/s at the end of 55 days of operation. Hydraulic conductivities of the upper layers decreased quickly with time, while slight reductions were observed in hydraulic conductivities of the lower layers.