Water Demineralization by Membrane Distillation Utilizing Cooling Water From Municipal Waste Incinerator

Abstract

The membrane distillation performance was studied for production of demineralized water from surface water (river). Hot water from cooling water system of municipal waste incinerator was considered as an energy source for membrane distillation. The integration of membrane installation with such cooling water system allows to re-use up to 18 kW per 1 m2 of the membranes. The studies were performed with the application of polypropylene capillary membranes Accurel PP S6/2. The membrane modules were supplied with the feed heated to a temperature of 310 K and 330 K. The permeate fl ux obtained for these temperatures was 2.8 and 9.7 L/m2 h, and the distillate conductivity was 6 and 4 S/cm, respectively. The water demineralisation process was carried out for 1200 h without module cleaning. The behaviour of the permeate fl ux and distillate conductivity indicate that used membranes maintained their non-wettability over tested period. The performed SEM-EDS examinations confi rmed, that the deposits did not fi ll the pores and were mainly formed on the membrane surface. The scaling intensity was defi nitely smaller for lower temperature (310 K) of the feed. The amorphous deposits containing beside Ca also substantial amounts of the Si were mainly formed under these conditions, whereas at higher feed temperature dominated CaCO3 scaling.

Energy Management Optimization of Open-Pit Mine Solar Photothermal-Photoelectric Membrane Distillation Using a Support Vector Machine and a Non-Dominated Genetic Algorithm

“…By comparing the three technologies of distillation, electrodialysis and reverse osmosis membrane (RO) technology to treat high-mineralization mine water, it has been found that the effluent water quality of the distillation method is good, and it can be obtained in the specific environment of low-cost heat sources near the coal mine; RO has comprehensive advantages in effluent quality, power consumption, desalination efficiency, floor space, and degree of automation [2]. Membrane distillation (MD) is a separation process combining membrane technology and distillation, and has unique advantages in the field of high-salt wastewater treatment [3]. For concentrated water after the RO treatment, the MD process is used, and the performance of the new hydrophobic composite membrane is optimized by the coating method.…”

“…TRNSYS 17.2 software has been used to simulate the solar-driven membrane distillation system [13]. The system set the effective area of the collector to 22.6 m 2 , the membrane surface area to 7.2 m 2 , and the initial water volume of the feed tank to 3m 3 . Hourly weather data was used as meteorological input data, and the running time was 5 days.…”