Drinking water quality improvement by physical methods, using middle-frequency inverters

2008 ◽  
Author(s):  
D. Vaju ◽  
C. Festila ◽  
G. Vlad
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Quality Improvement ◽  
Drinking Water Quality ◽  
Physical Methods ◽  
Water Quality Improvement

Sustainable improvement of drinking water quality by nanofiltration powered by renewable energy

2013 ◽  
Vol 13 (2) ◽  
pp. 309-318 ◽  
Author(s):  
J. A. López-Ramírez ◽  
E. Lee ◽  
R. J. Castañeda ◽  
J. Cho ◽  
N. García-Vaquero Marín
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Renewable Energy ◽  
Quality Improvement ◽  
Pilot Plant ◽  
Tap Water ◽  
Drinking Water Quality ◽  
Water Quality Improvement ◽  
Sustainable Improvement

Desalination membrane technology is increasingly used for water production. However, the main disadvantage of desalination is related to energy consumption and CO2 emissions, so desalination powered by renewable energy (RE) is getting interest. In this study nanofiltration (NF) membranes have been used for drinking water quality improvement in a pilot plant (50 m3/day) powered by RE (11.0 kW). The aims of this paper are: (1) to study the viability of a hybrid RE system to improve drinking water quality, (2) to study the availability of RE for NF desalination, and (3) to improve the chemical and organoleptic quality of tap water and tap water blended with nanofiltered water. Results confirm that desalination powered by RE is an interesting option for water quality improvement. Thanks to the hybrid system of the pilot plant, operation is around 93% of time. After several blind tastings, 82% of the tasters preferred water blended with nanofiltered water rather than current tap water.

scholarly journals Water Quality Responses during the Continuous Mixing Process and Informed Management of a Stratified Drinking Water Reservoir

2019 ◽  
Vol 11 (24) ◽  
pp. 7106
Author(s):  
Zizhen Zhou ◽  
Tinglin Huang ◽  
Weijin Gong ◽  
Yang Li ◽  
Yue Liu ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Quality Improvement ◽  
Microbial Community ◽  
Organic Carbon ◽  
Water Reservoir ◽  
Mixing Process ◽  
Water Quality Improvement ◽  
Continuous Mixing ◽  
Drinking Water Reservoir

Aeration and mixing have been proven as effective in situ water quality improvement methods, particularly for deep drinking water reservoirs. While there is some research on the mechanism of water quality improvement during artificial mixing, the changes to water quality and the microbial community during the subsequent continuous mixing process is little understood. In this study, we investigate the mechanism of water quality improvement during the continuous mixing process in a drinking water reservoir. During this period, we found a reduction in total nitrogen (TN), total phosphorus (TP), ammonium-nitrogen (NH4-N), iron (Fe), manganese (Mn), and total organic carbon (TOC) of 12.5%–30.8%. We also measured reductions of 8.6% and 6.2% in TN and organic carbon (OC), respectively, in surface sediment. Microbial metabolic activity, abundance, and carbon source utilization were also improved. Redundancy analysis indicated that temperature and dissolved oxygen (DO) were key factors affecting changes in the microbial community. With intervention, the water temperature during continuous mixing was 15 °C, and the mixing temperature in the reservoir increased by 5 °C compared with natural mixing. Our research shows that integrating and optimizing the artificial and continuous mixing processes influences energy savings. This research provides a theoretical basis for further advancing treatment optimizations for a drinking water supply.

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