Steinhardt DilliGent® LegioTec

Chemical-free Legionella prevention for water circuits – safe, efficient, durable

The Challenge

It’s a grow­ing chal­lenge to guar­an­tee safe water for drink­ing, show­er­ing and bathing in res­i­den­tial build­ings, schools, hotels, pub­lic build­ings and hos­pi­tals. The 2011 Drink­ing Water Ordi­nance and the updat­ed ver­sion from 2018 sets down pro­vi­sions for reg­u­lar con­trol of drink­ing water in pub­lic and in pri­vate build­ings. Accord­ing to a par­lia­men­tary enquiry (LT-Drs. 15/3734) the annu­al rate of lung infec­tions due to Legionel­la bac­te­ria lies at around 32,000; between 5 – 10 % of these cas­es result in fatality.

Own­ers and oper­a­tors are respon­si­ble for pro­vid­ing effec­tive and sus­tain­able solu­tions for the durable and reli­able pro­tec­tion of users and res­i­dents. In the fight against Legionel­la and bac­te­ria the devel­op­ment of resis­tance has become a prob­lem. Con­ven­tion­al meth­ods have reached the lim­its of their capac­i­ty. Heat-resis­tant Legionel­la or “sleep­er” Legionel­la can sur­vive even ener­gy-inten­sive increas­es of the hot water tem­per­a­ture. Renewed con­t­a­m­i­na­tion is unavoidable.

The Solution

The Stein­hardt Dil­li­Gent® LegioTec uses inno­v­a­tive tech­nol­o­gy to com­bat bac­te­r­i­al pol­lu­tion and to inhib­it re-con­t­a­m­i­na­tion with­in water cir­cuits long-term. Long years of expe­ri­ence and exper­tise in the field of water treat­ment have been invest­ed in the devel­op­ment and appli­ca­tion of hydro-mechan­i­cal Dil­li­Gent® cav­i­ta­tion tech­nol­o­gy. 

The com­pact unit func­tions ful­ly auto­mat­i­cal­ly with­out the addi­tion of chem­i­cals. The Dil­li­Gent® LegioTec units are sim­ply con­nect­ed to the hot water sys­tem and replace the cir­cu­la­tion pump.

The Way

The Dil­li­Gent® LegioTec‘s mode of oper­a­tion is based on phys­i­cal active prin­ci­ples with no added chem­i­cals. A par­tial hot water flow pass­es through the Dil­li­Gent® LegioTec unit for hydro-mechan­i­cal cav­i­ta­tion treat­ment. The bac­te­ria are mechan­i­cal­ly destroyed and removed from the water by means of oxi­da­tion. The Dil­li­Gent® LegioTec unit replaces the cir­cu­la­tion pump where­by the flow con­di­tions with­in the pip­ing sys­tem are stream­lined. Over time, coat­ings such as biofilm or algae growth are grad­u­al­ly elim­i­nat­ed and re-con­t­a­m­i­na­tion is pre­vent­ed. The Dil­li­Gent® LegioTec unit can be exact­ly adapt­ed to exist­ing sys­tem vol­umes and is designed for either per­ma­nent or inter­mit­tent oper­a­tion. 

The Advantages

  • ful­ly auto­mat­ic, com­pact unit 
  • can be inte­grat­ed into any build­ing 
  • low main­te­nance and oper­at­ing costs 
  • pays off with­in a very short timew
  • durable
  • reli­able pro­tec­tion for humans and buildings
  • removes bac­te­ria
  • pre­vents re-contamination
  • com­plies with per­mis­si­ble lim­its acc. to Drink­ing Water Ordinance
  • free of chemicals
  • no resis­tance problems

Further Products

Visualization of the cavitational effect

© Ecole Poly­tech­nique Fed­erale de Lau­sanne / 2014