利用耐盐硝化菌液强化高盐废水氨氮生化降解的研究

摘要

The activated sludge was acclimated into high salt tolerant sludge through increasing the concentration of sodium chloride and ammonia nitrogen periodically. Ammonia nitrogen was degraded from 100 mg/L to below 15 mg/L by the high salt tolerant sludge in 24 h, when the sodium chloride content of influent was 30 mg/L. Bacteria liquid containing salt tolerant nitrifying bacteria were cultured by the salt tolerant nitrifying bacteria enriched and screened from high salt tolerant sludge. The quantity of bacteria in the bacteria liquid was largest when the growth time was 24 h. The ammonia nitrogen biodegradation process was effectively enhanced after the 24 h growth bacteria liquid was put into wastewater with high salinity in a certain proportion. The removal rate of ammonia nitrogen was proportionate to the dosage of the salt tolerant nitrifying bacteria liquid.%通过阶段性提高氯化钠和氨氮浓度，将生活污水二沉池活性污泥驯化成为耐盐硝化污泥。在进水 NaCl含量为30 mg/L的条件下，经过24 h处理后，耐盐硝化污泥可以将氨氮从100 mg/L降解到15 mg/L以下。对该污泥进行富集筛选出耐盐硝化菌。利用分离出的菌种培养出含有耐盐硝化菌的菌液。菌液生长时间24 h时，细菌数量最大。将生长24 h的耐盐硝化菌液以一定比例投入高含盐的废水中，可以有效强化氨氮的生化降解过程，并且氨氮的去除率与耐盐硝化菌液的投加量成正比关系。