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This article in JEQ

  1. Vol. 37 No. 3, p. 977-982
     
    Received: July 9, 2007
    Published: May, 2008


    * Corresponding author(s): wuguangxue@tsinghua.org.cn
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doi:10.2134/jeq2007.0361

Nitrogen and Phosphorus Removal from Domestic Strength Synthetic Wastewater Using an Alternating Pumped Flow Sequencing Batch Biofilm Reactor

  1. Michael Rodgersa,
  2. Guangxue Wu *a and
  3. Xinmin Zhanb
  1. a Dep. of Civil Engineering and National Centre for Biomedical Engineering Science, National Univ. of Ireland, Galway, Ireland
    b Dep. of Civil Engineering, National Univ. of Ireland, Galway, Ireland

Abstract

Nutrient removal from domestic strength synthetic wastewater by an alternating pumped flow sequencing batch biofilm reactor (APFSBBR) was investigated in this laboratory study. The APFSBBR comprised two reactor tanks (Reactors 1 and 2) with two identical biofilm modules of vertical tubular plastic media with a high specific surface area, one in each tank. The APFSBBR was operated in cycles of four phases: fill, anaerobic, aerobic, and draw. During the fill phase, Reactor 1 was half-filled with domestic strength synthetic wastewater. During the subsequent anaerobic phase, most of the phosphorus release took place from the submerged biofilm in this reactor. In the aerobic phase, the wastewater was circulated by pumps between Reactors 1 and 2, resulting in denitrification at the start of the aerobic phase due to low oxygen concentrations, followed by nitrification and luxury uptake of phosphorus when oxygen concentrations increased. During the draw phase, Reactor 2 was half-emptied of the treated water. At the chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) loading rates on the total biofilm area of 3.20 g COD, 0.33 g TN, and 0.06 g TP m−2 d−1, the removal efficiencies were 97, 85, and 92% for COD, TN, and TP, respectively.

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Copyright © 2008. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of America