二氧化碳在工业水处理中的应用概述

Summary of the Application of Carbon Dioxide in Industrial Water Treatment

二氧化碳是一种具有温室效应的气体,大气层中CO2含量的升高显著推高地球表面的温度,引起一系列严重后果,诸如冰川融化、海平面上升、极端气候等。而现代工业的发展,却大大加快了向大气中排放二氧化碳的量,导致严重的温室效应。因此,如何减少排放和利用二氧化碳引起各国的高度重视。目前,处理二氧化碳的方法有深海掩埋、气体肥料、制成碳酸酯等方法。受技术、成本和使用量等因素影响,处理量有限。而工业水处理领域的工业循环冷却水处理、工业废水(污水)处理、工业纯水(原水)处理都是用水的大户,使用水量很大。如果能将二氧化碳在工业水处理方面进行应用,既可处理大量的工业用水,达到节水节能的目的,又可使用大量的温室气体,必将产生较大的社会效益和经济效益。

CO2 as a greenhouse gas can significantly raise the temperature on the surface of earth if its content in the atmos- phere keeps growing. The consequences can be disastrous such as melting glaciers, rising sea level and extreme weather conditions. Nevertheless, the development of modern industries is boosting the emission of CO2 into the atmosphere, resulting in increasingly serious greenhouse effects. Therefore, how to reduce emission and utilize CO2 has become a question that needs to be answered by governments as soon as possible. Currently CO2 is treated in several ways like buried in deep sea, transformed into gaseous fertilizer, used as a material for carbonic acid esters, etc. However, the quantity being treated is very small due to the restrictions related to technology, cost and usage. On the other hand, industrial water treatment industry is a major water consumer since it involves treatment of industrial circulation cooling water, industrial waste water （effluent） and industrial pure water （raw water）. If we can find a way to utilize CO2 in industrial water treatment industry, then it is possible to consume more greenhouse gas while increasing treatment capacity of the industrial water, in addition to saving more water and power. The social and economic benefits thus created can be quite considerable.