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Biological Nutrient Removal using Porous Media

다공성 담체를 이용한 생물학적 영양물질 제거

  • 조창식 (호서대학교 벤처전문대학원) ;
  • 이상혁 (호서대학교 벤처전문대학원)
  • Received : 2013.04.29
  • Accepted : 2013.05.20
  • Published : 2013.05.31

Abstract

This study aims to examine the modified $A^2/O$ process is useful to reduce the environmental pollution caused by nutrient in wastewater. Specific results are as follows: The removal rate was evaluated at each time period, ie., 18h, 8h, 6h, and 3h after the reaction started. The anoxic rate was more than 94-97% from 18h to 6h but was less than 50% before 6h. Thus, the test of nitrification was done using 6h as the optimal anoxic retention time and the aerobic retention time set at 24h. When the flow change was 1:1, the average ammonia concentration inputted was $30mg/{\ell}$. Returned top nitric acid solution and the concentration of ammonia solution falling into the anoxic reactor was about 50% of the initial concentration, and the flow change was 1:2, the concentration of ammonia falling into the anoxic reactor was about 62% of that of influxed ammonia. And the results of this study showed that the nitrogen removal rate can be improved by inputting untreated nitric acid and changing the flow of top nitrate solution using the modified $A^2/O$ method.

Keywords

Biological Nutrient Removal;Porous Media;treatability test;modified $A^2/O$ process;nitrogen removal