HUANGHai-bo.Application of Deamination Membrane Process in Upgrading Project for Treating High Ammonia of Vanadium Precipitating Wastewater[J].China Water & Wastewater,2023,39(6):98-102.
Application of Deamination Membrane Process in Upgrading Project for Treating High Ammonia of Vanadium Precipitating Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第6期
Page:
98-102
Column:
Date of publication:
2023-03-17
- Abstract:
- The deamination process for treating high ammonia of vanadium precipitating wastewater was upgraded by deamination membrane process in a vanadium titanium-factory of Sichuan Province. The operation data of half a year demonstrated that the process worked well and ammonia concentration was reduced from 100-400 mg/L to less than 10 mg/L, which fully met the ammonia nitrogen discharge requirements. The ammonia removal rate of the process was relatively stable with average removal rate of 86% in its single stage and average total removal rate of 98%, and the influent ammonia nitrogen concentration did not affect its ammonia removal efficiency obviously. The by-product ammonium sulfate concentration was generally 10%-14%, containing 0.5%-1% of NaCl impurity, thus it is needed to be further concentrated and crystallized in order to obtain more than 98% of pure ammonium sulfate solid. In this upgrading project, the deamination membrane device covers a total area of about 30 m2, and the total investment is about 2.1 million yuan, of which the deamination membrane component is 1.51 million yuan, accounting for 71.9%, and the average daily treatment cost is 3.06 yuan/m3.
Last Update:
2023-03-17