氨氮废水的资源化预处理研究

Resource Utilization Pretreatment of Ammonia Nitrogen Wastewater

采用一体式膜生物反应器研究了其对氨氮废水的资源化作用。结果表明:在进水p H值为7~8、溶解氧在3~5 mg/L之间、水力停留时间为24 h左右、水温控制在28℃的条件下,氨氮废水在膜生物反应器中实现了较好的转化,氮素损失在10%~20%之间,出水呈酸性状态(p H值在5~6之间),氮元素以氨氮、硝态氮、亚硝态氮的形式存在,为后续的膜浓缩奠定了基础。

The submerged membrane bioreactor was used to study the resource utilization of ammonia nitrogen wastewater. The results showed that when the pH of inlet water was 7-8 ,DO was 3-5 mg/L,the HRT was about 24 hour,the water temperature was controlled under 28℃ ,the ammonia nitrogen wastewater achieved a better conversion in the membrane bioreactor. The nitrogen loss was 10%-20% ,the effluent water was acidic and the pH value was 5-6. Nitrogen element existed in the form of ammonia nitrogen,nitrate nitrogen and nitrite nitrogen. The results can lay a foundation for the subsequent membrane concentration.