模拟纸和造纸行业的废水再利用,以预测对导电性的影响
Stephanie Prasse1, Patrick Huber2, Pascal Ottenio2
1Centre Technique du Papier, CS90251 38044 Grenoble cedex 9, France
概括
回收废水处理厂的废水,大大减少了织物厂的淡水使用量. 虽然它增加了导电性,但对添加物的影响是最小的,并且可以控制酸盐水平.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 工业化学 工业化学 工业化学
背景情况:
- 纸和造纸厂消耗大量的淡水.
- 回收废水处理厂 (WWTP) 废水提供了一种减少淡水摄入量的策略.
- 工厂中电路闭塞的增加可能会导致电导率升高和化学氧气需求 (COD).
研究的目的:
- 在回收WWTP废水时模拟和评估纸和纸张电路的导电率变化.
- 量化回收废水对织物厂淡水减少的影响.
- 确定导电性增加的主要来源,并评估其可管理性.
主要方法:
- 使用了与PHREEQC化学模拟引擎集成的PS2000数字模型.
- 模拟了WWTP废水的回收,用于组织工厂内的各种工艺用途.
- 识别和量化导电源,包括来自微生物活动的酸盐,二硫酸和酸盐.
主要成果:
- 在所有应用中实施WWTP废水回收,可减少高达96%的淡水使用量.
- 电路关闭的显著增加导致更高的COD和导电水平.
- 发现,电导率提高对厂添加剂的影响是有限的.
- 乙酸盐的生产,一个关键的导电性贡献者,可以通过改进的动或通风来控制.
结论:
- 回收WWTP废水是一种可行的方法,可以在组织制造中大幅减少淡水.
- 虽然导电率上升,但它是可以管理的,并且对被研究的磨坊中的添加剂产生有限的负面影响.
- 过程优化,例如控制酸盐生产,可以减轻导电率的增加,并减少用于pH控制的化学品的使用.
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