试验结果表明：通过高浓度游离氨对硝化菌选择性抑制所获得的亚硝酸盐积累是不稳定的；
The experimental results showed that the nitrite accumulation obtained from selective inhibition of high concentration free ammonia to nitrifier was unstable.
猪场废水中的氨氮浓度高，大多以铵离子和游离氨的状态存在。
Pig farm wastewater in high concentration of ammonia , ammonium ions and are free to the state of ammonia exist.
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