Abstract

The article presents results of research aimed to determine optimum operational modes of ultrafiltration membranes used to purify biologically treated wastewater as a pretreatment for further reverse osmosis desalination to produce water for industrial use. Results of experimental investigations are presented that evaluated influence of working pressure on operational costs. Optimum values of working pressure are determined for ultrafiltration treatment of wastewater with suspended solids concentrations 20 and 50 mg/L. A special respect is attributed to reduction of ultrafiltration membrane flux due to pore plugging during filtration cycle. Characteristics of membrane backwashing process are determined aimed on flushing-off all particles that plug membrane pores. Prognostic techniques are developed to predict reduction of ultrafiltration membrane flux due to pore plugging and schedule to apply additional membrane backwashes after flux reduces by 25 per cent at high-pressure values is proposed. Additional operational costs values are determined that account for increase of required membrane area and wash water to remove particles that plug pores.

中文翻译：

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超滤废水处理的最佳操作压力值的确定

摘要

本文介绍了旨在确定用于纯化生物处理废水的超滤膜的最佳操作模式的研究结果，作为进一步进行反渗透脱盐以生产工业用水的预处理。提出了实验研究的结果，以评估工作压力对运营成本的影响。确定了超滤处理悬浮固体浓度为20和50 mg / L的废水的最佳工作压力值。一个特别的方面归因于由于过滤循环期间的孔堵塞而导致的超滤膜通量的减少。膜冲洗工艺的特性旨在冲洗掉堵塞膜孔的所有颗粒。已开发了预测技术，以预测由于孔堵塞而导致的超滤膜通量减少，并提出了在通量在高压值降低25％之后应用额外的膜反冲洗的时间表。确定额外的运营成本值，以说明所需的膜面积增加和洗水以去除堵塞孔的颗粒。