Micro\u00ador\u00adga\u00adnisms can cause serious damage in under\u00adground storage tanks and technical systems, which can lead to the shutdown of opera\u00adtions. Colonization of system components, e.g. cooling systems, heat exchangers, filters or pipelines, often results in costly maintenance work.<\/p>\n\n\n\n
We offer you specially adapted micro\u00adbio\u00adlo\u00adgical tests under practical condi\u00adtions for samples containing water, oil or solids from technical systems, boreholes, probes, caverns and pore or aquifer storage facilities.<\/p>\n\n\n\n
Various microbial processes (e.g. sulphate reduction, anaerobic fermen\u00adtation or polymer formation) can be of signi\u00adfi\u00adcance for the operation of storage facilities or geothermal plants, as a result of which material conver\u00adsions, corrosion, acidi\u00adfi\u00adcation, permea\u00adbility losses and probe blockages can occur.<\/p>\n<\/div><\/div>\n\n\n\n
The tests always require a micro\u00adbio\u00adlo\u00adgical analysis of the specific site condi\u00adtions. Special, tried and tested test media and analysis methods guarantee reliable analysis and typing of the organisms present. In addition, growth tests enable a user-oriented, extensive charac\u00adte\u00adrization of the detected bacterial popula\u00adtions. These analyses are supple\u00admented by molecular biolo\u00adgical detection and typing methods.<\/p>\n\n\n\n
One focus of the future-oriented work will be the evaluation and risk assessment of the under\u00adground storage of regene\u00adra\u00adtively produced hydrogen.<\/p>\n<\/div><\/div>\n\n\n\n
Due to unexpected, critical pressure increases in the circuit of a geothermal plant, the material of a pump pre-filter was examined micro\u00adbio\u00adlo\u00adgi\u00adcally. High levels of hydrogen-utilizing, sulphate-reducing bacteria (SRB) were detected in liquid cultures and by PCR. Growth tests with the enriched bacterial cultures proved that the organisms only multiply at tempe\u00adra\u00adtures below 40\u00b0C and therefore cannot originate from the heating circuit, which is over 55\u00b0C warm. Instead, they were bacteria intro\u00adduced from the cold water circuit.<\/p>\n\n\n\n
The risk of the organisms adapting to higher tempe\u00adra\u00adtures and the associated conta\u00admi\u00adnation of the warm water circuit was pointed out and sugges\u00adtions for further measures were provided.<\/p>\n<\/div><\/div>\n\n\n\n
A drilled shaft with a 6 m diameter for a salt mine was to be sunk using a CMC drilling fluid (carboxy-methyl cellulose). Several 1,000 m\u00b3 of drilling fluid was stored in over ground basins. An intensive microbial CMC disin\u00adte\u00adgration set in during the summer months. As a result, the drilling fluid could not be stabi\u00adlized even through conti\u00adnuously high subse\u00adquent doses of CMC. The driller threa\u00adtened to remain stuck due to the swelling clay in the drilled hole.<\/p>\n\n\n\n
The result of extensive biocide tests showed that in the short term no prepa\u00adration could be provided for this dimension.<\/p>\n\n\n\n
Therefore an alkaline stabi\u00adli\u00adsation of the drilled fluid was tested and suggested at a pH value of 11\u201312. The bacteria were thus effec\u00adtively destroyed and the drill could be lowered safely without any further loss of fluid.<\/p>\n<\/div><\/div>\n\n\n\n
During a solution mining process for under\u00adground gas storage a heavy preci\u00adpi\u00adtation and floccu\u00adlation with subse\u00adquent plugging occurred.<\/p>\n\n\n\n
In water samples high cell numbers of various physio\u00adlo\u00adgical groups of bacteria were detected. It was supposed that organic compounds (cellu\u00adlosic substances), which have been injected with water into cavern serve as nutrient source. Microbial degra\u00addation processes obviously resulted in a high conta\u00admi\u00adnation, which has not been suppressed by high salt content of produced brine. Rather, it was demons\u00adtrated that during the solution mining process a salt resistant bacteria population estab\u00adlished, which could grow on 245 g NaCl per litre.<\/p>\n\n\n\n
It could be proven that slime-forming micro\u00ador\u00adga\u00adnisms were substan\u00adtially involved in floccu\u00adlation. As this process continues in simulated tests net-like struc\u00adtures developed containing filamentous bacteria. With incre\u00adasing salt concen\u00adtra\u00adtions more complex filaments were produced. This corre\u00adlation could be explained with emergence of new bacterial cell morpho\u00adlogies charac\u00adte\u00adrized by reduced mobility and disturbed cell division under physio\u00adlo\u00adgical stress at high salinity.<\/p>\n\n\n\n
As a result of micro\u00adbio\u00adlo\u00adgical inves\u00adti\u00adga\u00adtions case-specific measures were recom\u00admended to reduce nutrient discharge and finally suppress bacteria.<\/p>\n<\/div><\/div>\n\n\n\n
Corrosion damages on the outer wall of a natural gas pipeline within a swampy area have been detected by the operator. The pipeline was equipped with a cathodic corrosion protection.<\/p>\n\n\n\n
A key factor for corrosion was initial process of hydrogen sulfide generation by sulfate reducing bacteria (SRB) which utilized the hydrogen jacket as energy source generated by cathodic corrosion protection. Hydrogen sulfide (H2<\/sub>S) produced by SRB reacted with iron ions dissolving from pipeline wall finally forming black iron sulfide (FeS). H2<\/sub>S and FeS are oxidized by several groups of sulfur oxidizing bacteria (SOB) to sulfuric acid and iron(II) sulfate. Speci\u00adfi\u00adcally Acidi\u00adthi\u00ado\u00adba\u00adcillus<\/em>ferro\u00adoxidans<\/em> oxidizes iron(II) sulfate to iron(III) salts. Starting from iron(II)sulfide (pyrite) substantial amounts of sulfuric acids will be produced in connection with water, which finally lead to an increased micro\u00adbially influenced corrosion (MIC) of metal components.<\/p>\n\n\n\n As a result of extensive micro\u00adbio\u00adlo\u00adgical inves\u00adti\u00adga\u00adtions, the activity of bacteria involved and cause of the corrosion process have been determined.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n Under\u00adground storage and technical facilities Micro\u00ador\u00adga\u00adnisms can cause serious damage in under\u00adground storage tanks and technical systems, which can lead to the shutdown of opera\u00adtions. Colonization of system components, e.g. cooling systems, heat exchangers, filters or pipelines, often results in costly maintenance work. We offer you specially adapted micro\u00adbio\u00adlo\u00adgical tests under practical condi\u00adtions for samples [\u2026]<\/p>\n","protected":false},"author":1,"featured_media":311,"parent":902,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-full-width-image.php","meta":{"wp_typography_post_enhancements_disabled":false,"_hupa_show_title":false,"_hupa_custom_title":"","_hupa_title_css":"","_hupa_select_menu":1,"_hupa_select_sidebar":1,"_hupa_show_social_media":false,"_hupa_select_social_type":0,"_hupa_select_social_color":0,"_hupa_social_media_css":"","_hupa_select_handy_menu":1,"_hupa_select_top_area":1,"_hupa_show_bottom_footer":true,"_hupa_show_top_footer":false,"_hupa_show_widgets_footer":false,"_hupa_sticky_widgets_footer":1,"_hupa_select_header":0,"_hupa_select_container":0,"_hupa_top_area_container":0,"_hupa_main_container":0,"_hupa_select_footer":0,"_hupa_show_menu":true,"_hupa_show_custom_url":false,"_hupa_beitragsbild_url":"","footnotes":""},"class_list":["post-907","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\n