Treatment of septic tank effluents by a full-scale capillary seepage soil biofiltration system.

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  • Additional Information
    • Source:
      Publisher: National Environmental Health Association Country of Publication: United States NLM ID: 0405525 Publication Model: Print Cited Medium: Print ISSN: 0022-0892 (Print) Linking ISSN: 00220892 NLM ISO Abbreviation: J Environ Health Subsets: MEDLINE
    • Publication Information:
      Publication: Denver Co : National Environmental Health Association
      Original Publication: Denver.
    • Subject Terms:
      Waste Disposal, Fluid*; Sewage/*microbiology ; Soil Pollutants/*isolation & purification ; Water Purification/*methods; Taiwan ; Water Purification/instrumentation ; Water Supply
    • Abstract:
      The purpose of this study is to evaluate the efficiency of septic tank effluent treatment by an underground capillary seepage soil biofiltration system in a suburban area of Taipei, Taiwan. In contrast to traditional subsurface wastewater infiltration systems, capillary seepage soil biofiltration systems initially draw incoming influent upwards from the distribution pipe by capillary and siphonage actions, then spread influent throughout the soil biofiltration bed. The underground capillary seepage soil biofiltration system consists of a train of underground treatment units, including one wastewater distribution tank, two capillary seepage soil biofiltration units in series, and a discharge tank. Each capillary seepage soil biofiltration unit contains one facultative digestion tank and one set of biofiltration beds. At the flow rate of 50 m3/day, average influent concentrations of biochemical oxygen demand (BOD), suspended solid (SS), ammonia nitrogen (NH3-N), and total phosphates (TP), were 36.15 mg/L, 29.14 mg/L, 16.05 mg/L, and 1.75 mg/L, respectively. After 1.5 years of system operation, the measured influent and effluent results show that the treatment efficiencies of the soil biofiltration system for BOD, SS, NH3-N, TP, and total coliforms are 82.96%, 60.95%, 67.17%, 74.86%, and 99.99%, respectively.
    • Accession Number:
      0 (Sewage)
      0 (Soil Pollutants)
    • Publication Date:
      Date Created: 20090331 Date Completed: 20090512 Latest Revision: 20090330
    • Publication Date:
      20221213
    • Accession Number:
      19326671