A/O装置快速培养处理低C/N污水的活性污泥的研究

Research on Low C/N Wastewater Treatment by A/O Device Rapid Cultured Activated Sludge

针对当前工业中常见的低C/N的废水处理效果不理想,利用传统的A/O系统,采用逐步降低C/N的方式,快速驯化具有较好脱氮效果的污泥,探索其培养参数及实际处理效果。实验结果表明,在A/O中,随着进水COD,氨氮不断提高,C/N不断减小的情况下,出水氨氮,COD均保持在较低的水平,出水总氮质量浓度虽然稍有增加,但总氮去除率却不断提高,最终进水氨氮质量浓度为400 mg/L,COD为2 000 mg/L,出水氨氮<3 mg/L,COD<50 mg/L,总氮去除率达90%,显微镜下观察污泥微生物相丰富,菌胶团紧密。并用实际废水进行验证实验,对实际废水也有较好的脱氮效果,脱氮污泥驯化成功。

In order to treat common low C/N wastewater in industry, traditional A/O system was used to acclimate sludge rapidly which had a better nitrogen removal effect by reducing C/N gradually. And the culture parameters and practical treatment effect were researched. The results showed that, with COD and ammonia nitrogen increased and C/N decrrased in influent of A/O, the ammonia nitrogen and COD in effluent were maintained at a good level, the TN in influent increased gradually, but the total nitrogen removal rate increased continuously. When the ammonia nitrogen and COD ofinfluent was 400 mg/L and 2 000 mg/L respectively, the ammonia nitrogen and COD of effluent was less than 3 mg/L and 50 mg/L respectively, the total nitrogen removal rate reached 90%. Rich sludge microbes and close bacteria glue group could be seen under the microscope. It also had a good nitrogen removal effect in actual wastewater verification experiment, it proved that the cultivation of denitrification sludge was successful.