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Kinds of Trickling Filters I. According to the technological parameters Low rate trickling filters High rate trickling f

IV. Wastewater Treatment Technologies Topic IV. 10. Wastewater Treatment Facilities with Attached Biomass - Trickling Filters: Kinds, Structures, Basic Technological Parameters. Kinds of Trickling Filters I. According to the technological parameters Low rate trickling filters

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Kinds of Trickling Filters I. According to the technological parameters Low rate trickling filters High rate trickling f

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  1. IV. Wastewater Treatment TechnologiesTopic IV. 10. Wastewater Treatment Facilities with Attached Biomass - Trickling Filters: Kinds, Structures, Basic Technological Parameters Kinds of Trickling Filters I. According to the technological parameters • Low rate trickling filters • High rate trickling filters • Rotating disks II. According to the carrying material • Natural (gravel) • Plastics • Grains • Sheets

  2. Wastewater Treatment Facilities with Attached Biomass Kinds of Trickling Filters III. According to the necessity of wastewater recirculation • With purified wastewater recirculation • Without purified wastewater recirculation IV. According to the the kind of biological processes • Aerobic • With natural circulation of air • With ventilators or blowers • Anaerobic V. According to the technological stages • One stage (single) • Two stages

  3. Technological Schemes with Recirculation a - with purified wastewater recirculation б - with purified wastewater and secondary sludge recirculation b - with interim settling 1 - primary settling tank 2 - trickling filter 3 - secondary clarifier 4 - secondary sludge 5 - recirculating wastewater 6 - primary and secondary sludge Kinds of Trickling Filters

  4. Scheme of Two Stage Trickling Filters 1 - primary sludge; 2 - first stage trickling filter; 3 - first stage secondary clarifier; 4 - second stage trickling filter; 5 - second stage secondary clarifier; 7 - recirculating purified wastewater; 8 - primary and secondary sludge Kinds of Trickling Filters

  5. General Scheme of Trickling Filter (Round in Plane) 1 - biomass carrier; 2 - wall; 3 - drainage bottom; 4 - drainage collecting channel; 5 - jet wastewater distributing device; 6 - ventilation orifices Trickling FiltersStructures

  6. Jet Wastewater Distribution Device Trickling FiltersStructures

  7. Drainage Bottom of Trickling Filter a - bricks; б - arch drainage elements; b - concrete bar racks; г - drainage bottom supporting elements Trickling FiltersStructures

  8. Rotating Disks (Biodisks) Trickling FiltersStructures

  9. Trickling FiltersBasic Technological Parameters qf- surface hydraulic load, m3/m2.d qw - volume hydraulic load, m3/m3.d OC - oxidizing capacity, gBOD5/m3.d OL - organic load, gBOD5/m3.d Q - wastewater design flowrate, m3/d W - trickling filter working volume, m3 Qr - recirculating wastewater flowrate, m3/d n - recirculation ratio L0 - influent BOD5 concentration, g/m3 L - effluent BOD5 concentration, g/m3 Lmix - mixed wastewater BOD5 concentration, g/m3 F - trickling filter horizontal area, m2

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