The pre-treatment system experienced plugging by ammonia salt 7 months after the unit came on stream and corrosion leakage 12 month after the start-up of the unit.

装置开工运转7个月后预处理系统首次出现铵盐堵塞现象，12个月后设备开始出现腐蚀泄漏情况。

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We have used the iron salt dearsenic method in the alkaline ammonia immersion technology successfully.

将铁盐除砷方法运用于碱性氨浸工艺中获得成功，对操作条件进行了总结，对除砷机理作了解。

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The operation results show that the basic oxidation is effect to decrease the contents of ammonia nitrogen, phosphide and salt. This is very favorable to the following biological treatment.

实践证明利用碱解氧化可降低浓废水中的氨氮、 磷化物及盐浓度，对保证后续生物处理系统正常运行有重要作用。

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