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许多环境因子会影响反硝化的速率和最终产物。其中最重要的是温度和pH。本研究就pH和温度瞬时变化和长期缓慢驯化对反硝化的影响进行了试验。一、材料和方法本研究在实验室规模的完全混合反应器中进行。pH通过自控仪加HCL和N_(?)OH来自动控制。温度以恒温水浴自动调节控制。反应器完全密封并充氮气,用机械搅拌器搅拌以免污泥沉积并使基质与污泥充分混合。基质以混合挥发性酸VFA作为碳源,其甲酸、乙酸、丙酸、丁酸、戊酸的比例为1:6:5:4:2(按TOC值)。氮源采用NaNO_3、磷素营养按P/C为0.01gK_2HPO_4-P/gVFA-C的比例投加。碳、氮基质用恒流泵分别投
Many environmental factors affect the rate of denitrification and the final product. The most important of these are temperature and pH. In this study, the effects of instantaneous pH and temperature changes and long-term slow domestication on denitrification were tested. I. Materials and Methods The study was conducted in a lab-scale fully mixed reactor. The pH is controlled automatically by HCI and N _ (?) OH. Temperature to water bath automatically adjust the control. The reactor was completely sealed and filled with nitrogen, agitated with a mechanical stirrer to avoid sludge deposition and to thoroughly mix the substrate with the sludge. The matrix was mixed volatile VFA as a carbon source, and the ratio of formic acid, acetic acid, propionic acid, butyric acid and valeric acid was 1: 6: 5: 4: 2 in TOC value. Nitrogen source using NaNO_3, phosphorus nutrition by P / C 0.01gK_2HPO_4-P / gVFA-C ratio of dosing. Carbon, nitrogen matrix were cast with a constant current pump