Title page for ETD etd-10072005-094846

Type of Document Master's Thesis
Author Liu, Hanping
URN etd-10072005-094846
Title Utilization of Captor sponges to maintain nitrification and denitrification in BNR activated sludge at low aerobic MCRTs
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Randall, Clifford Committee Chair
Boardman, Gregory D. Committee Member
Love, Nancy C. Committee Member
  • wastewater treatment
Date of Defense 1996-02-05
Availability restricted

The performance of Captor media integration into the aerobic zone of an activated sludge wastewater treatment system operated at low MCRTs was evaluated using a pilot scale Virginia Initiative Project (VIP) process. Two separate trains were operated, one with Captor media incorporated into the aerobic zone of the system, referred to as an Integrated Fixed Film Activated Sludge (IF AS) system, . and the other as a control system, i.e., with no media in the aerobic reactors. The wastewater used for this research was pumped from a main municipal sewer of the Blacksburg-VPI Sanitation Authority Collection System. The TKN of the wastewater was supplemented by the addition of urea to maintain the influent ammonia concentration around 55 mg/L as nitrogen. Sodium acetate was added to maintain the influent COD around 450 mg/L and Sodium bicarbonate was added to maintain the pH in the aerobic zone around 7. The system was operated at MCRTs of 1.7, 1.0 and 0.3 days with the operating temperature around 12 C.

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