PRECIPITATING ORGANIC POLLUTANTS FROM AQUEOUS LIQUIDS
收藏国家林业和草原科学数据中心2023-02-12 更新2024-03-07 收录
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资源简介：
The invention concerns a method for precipitating organic pollutants from aqueous liquids used in process stages for bleaching or de-lignifying pulp in a pulp mill. The method comprises the steps of adjusting the pH of an acid aqueous liquid received from a bleaching or de-lignifying process stage in a pulp mill to alkaline by adding at least one agent containing calcium， precipitating organic pollutants in a precipitation stage from the alkalated aqueous liquid， and reducing the pH of the filtrate from said precipitation stage to a value of 6 –9 by adding at least one acid agent to said filtrate.With the inventive method， organic pollutants are effectively removed and COD levels of the filtrate are significantly lowered compared with traditional processes. The processing of effluents and wastewater thus become simplified.
提供机构：
国家林业和草原科学数据中心
创建时间：
2023-02-12
