Research for Start-up Experiment about IC Reactor to Treat Straw-washing Wastewater in Straw based Pulping and Papermaking

摘要

In this paper, an IC reactor whose effective volume was 6m3 was used in the experiment to determine the best condition when decontaminating the straw-washing water produced in the straw-based pulping and papermaking industry. The best condition of IC reactor to treat straw-washing wastewater through experiment was: the pH should be controlled in the neutral range, not less than 6.6; the temperature should be maintained at about 31°C, not more than 35°C; the fluctuation range of volume loading should better not be over 15%; To meet the alkalinity of the reactor over 1000 mg/L, the dosage of sodium bicarbonate was 12 kg/d. In the processing of reactor treating straw-washing wastewater, COD removal rate was lower, and effluent VFA stayed at a high level continuously. So the hydrolysis-acidification process was more appropriate than anaerobic treatment when decontaminating the straw-washing water.