CO_2脱除法提高废水pH值的研究现状

磷的过量排放会导致水体富营养化造成环境的不良影响,同时在污水处理厂中,溶解性磷富集处管道容易因产生鸟粪石沉淀而造成管道堵塞影响污水处理厂的正常运行。pH值是鸟粪石结晶反应重要参数之一,且大量研究表明最佳pH值范围为9.30～9.40。本文首先阐明了CO2脱除法提高废水pH值原理,然后综述归纳了不同方式脱除CO2提高废水pH值在国内外的研究及应用现状,最后比较各方式的优缺点并提出了今后研究的建议。

Research status of improving the pH value of the wastewater by stripping CO2

The excess phosphorus emissions can lead to eutrophication,at the same time,in the wastewater treatment plants,the pipelines where enrich dissolved phosphorus maybe block due to the production of struvite,that maybe affect the normal operation of the sewage treatment plants.The pH value of reaction is a major parameter of the struvite crystallization reaction,numerous studies indicate that the optimum range of pH value is 9.30～9.40.This paper we firstly clarify the principle of improving the pH value of the wastewater by stripping CO2,and then summarize the research and application status of this method by different ways.Finally,we compare the ways＇ advantages and disadvantages,thus,we bring up the feasible advice.