Improvements to the quality of underground water by introducing carbon dioxide

Mojca Poberžnik (Author), Ludvik Trauner (Author), Albrecht Leis (Author), Aleksandra Lobnik (Author)

Abstract

Predstavljeno raziskovalno delo obravnava razvoj sodobne metode za izboljšanje kakovosti podzemne vode z ekonomsko perspektivno uporabo ogljikovega dioksida. Osnovna pilotna naprava za uvajanje ogljikovega dioksida je bila razvita z namenom ohranjanja karbonatnega ravnotežja v vodi, ki se črpa iz podzemlja. Optimalna količina ogljikovega dioksida, ki je naravna komponenta podzemne vode ob uporabi le-te v različne namene (pitna, tehnološka voda) nudi hkrati zaščito pred odlaganjem mineralnih oblog in preprečuje korozijo. Adaptacija obstoječe pilotne naprave je v začetni fazi vključevala testni zagon in preliminarne meritve. V nadaljevanju je bil vgrajen senzorski sistem za spremljanje najpomembnejših parametrov karbonatnega ravnotežja: pH vrednosti, temperature, prevodnosti in raztopljenega CO2. Sledili sta dve seriji eksperimentov z različnimi količinami dodanega CO2. Kemijska sestava vode je bila analizirana s pomočjo ionske kromatografije in avtomatske titracije. Regulacija uvajanja plina je bila v prvi seriji eksperimentov volumetrična, v drugi seriji pa zaradi boljšenatančnosti nadomeščena z masno regulacijo, tehtanjem plina. V začetku pretočni sistem je bil v drugi seriji zaprt glede na dotok sveže vode, z namenom doseganja večjih nihanj v sestavi vode. Sledili so eksperimenti v različnih letnih časih z namenom ugotoviti vpliv letnih časov na sestavo podzemne vode in učinkovitosti dodajanja ogljikovega dioksida.

Keywords

underground water;drinking water quality;pilot plant;carbonate equilibria;carbon dioxide;precipitation;scale;

Data

Language:	English
Year of publishing:	2008
Typology:	1.01 - Original Scientific Article
Organization:	UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
UDC:	556.32
COBISS:	12905494
ISSN:	1854-0171
Parent publication:	Acta geotechnica Slovenica
Views:	889
Downloads:	51
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary title:	Izboljšanje kvalitete podzemne vode z uvajanjem ogljikovega dioksida
Secondary abstract:	The presented research work is focused on the development of an innovative way of economically improving the quality of underground water by the application of carbon dioxide. The basic pilot plant was developed with the idea of applying carbon dioxide in order to maintain the carbonate equilibria in water, pumped from under the ground. The optimal content of this natural component in underground water, used in urban areas for different purposes (e.g. drinking water, heating systems etc), simultaneously prevents corrosion and precipitated mineral deposits. The adaptation of an existing pilot plant started with operational testing and preliminary measurements. An appropriate sensor system for the online monitoring of the tap waterćs heating process measuring parameters such as the temperature, the concentration of dissolved carbon dioxide, the conductivity and the pH value was built in. Different amounts of carbon dioxide were applied during the two experimental stages. The composition of the water was regularly analysed using automatic titration and ionic chromatography. The gas-dosing control in the first phase was volumetric. Due to an observed inaccuracy in the gasdosing system, the volumetric dosing control was replaced with a system for the mass control of the introduced gas. Closing the system was considered to be suitable, as the water composition remained almost constant during the entire experiment. Improvements to the gas-dosing control and the closing of the system were carried out in the final phase of the pilot plantćs adaptation. Further measurements were made in different seasons to test the seasonal influences onunderground water's composition and the efficiency of the carbon dioxide supply.
Secondary keywords:	podzemna voda;kakovost pitne vode;pilotna naprava;karbonatno ravnotežje;ogljikov dioksid;obarjanje;vodni kamen;
URN:	URN:SI:UM:
Type (COBISS):	Scientific work
Pages:	str. 50-62
Volume:	ǂVol. ǂ5
Issue:	2
Chronology:	2008
ID:	10939526