黄水中游离氨对污水管网硫化物的抑制研究

Study on inhibition of sulfide in sewer networks by free ammonia in urine

污水管网中硫化物的产生是造成管网腐蚀恶臭的重要原因,现在的解决策略以药剂投加为主,费用高昂且不够环保,目前较为前沿且环境友好的研究有基于黄水中游离亚硝酸实现对管网硫化物的控制。游离氨同样作为黄水分解的产物,是否也对硫化物有抑制作用值得思考和验证。通过构建实验室规模的反应器模拟管网生物膜情况,分别研究了未经稀释和稀释10倍黄水中的游离氨投加对管网中生物膜产生硫化物的抑制效果,并在投加前后和浸泡过程中做周期实验观测其他指标的变化。结果表明,利用10倍稀释的黄水进行连续投加可有效抑制管网中硫化物和甲烷的产生。

The generation of sulfide in the sewage pipe network is an important cause of the fouling of pipe network corrosion.The current solution strategy is based on pharmaceutical dosage,which is costly and not environmentally friendly.At present,more advanced environmentally friendly research is based on the preparation of free nitrous acid based on urine.Free ammonia is also used as a product of urine decomposition,and it is worth considering and verifying whether it inhibits sulfide.In this paper,by constructing a laboratory-scale reactor to simulate the biofilm of the pipe network,the inhibitory effect of free ammonia in the urine and diluted ten times of urine on the production of sulfide in the biofilm of the pipe network was studied.Batch experiments were performed before and after the soaking process to observe changes in other indicators.The results show that the continuous addition of ten times diluted urine can effectively inhibit the production of sulfide and methane in the pipe network.