Commissioning and Start-up of Pilot-scale Microporous Oxidation Ditch at Low Temperature
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
7-11
Column:
Date of publication:
2020-04-01
- Keywords:
- microporous aeration oxidation ditch; low temperature; start-up; nitrogen and phosphorus removal
- Abstract:
- A pilot-scale microporous aeration oxidation ditch was applied to treat the effluent from a grit chamber of a wastewater treatment plant, and the feasibility and reliability of starting up the pilot plant at low temperature were investigated. The pilot plant had strong shock load resistance, and the system operated stably at low temperatures between 13 ℃ to 18 ℃ when maintaining dissolved oxygen concentration between 0.5 mg/L and 1.0 mg/L. Except TP, the effluent quality of the pilot plant reached the first level A criteria of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant during the late period of the test. The pilot plant could be started up by reducing the aeration rate at low temperature. The reason for poor phosphorus removal was mainly related to irregular sludge discharge，poor phosphorus removal capacity of inoculated sludge and nitrate in the reflux sludge.
Last Update:
2020-04-01