Dear,

could you, please, explain why you put questions in a language pair which, according to your profile, you are not working with? You specify English-Thai there. How can you do a job involving German then? The more, your question shows that, really, you do not seem to have enough experience in German if you don't get the sense of "mit Hilfe von Patronen ins Wasser". Do you want us to do a job you get paid for, or what is the background. By no means I would like to offend you but, indeed, it makes me wonder, and, equally, I would like to preserve other colleagues from being cheated.

Aerobic water purifier is a water purifier using oxygen as a means of treatment. "Patrone" is cartridge.

Google search for aerobic water purifier resulted in 745 hits - for example the following:

"BRIGADE QUARTERMASTERS AEROBIC WATER PURIFIER

A safe, non-toxic stabilized liquid concentrate of electrolytes of oxygen is used for treating emergency stores of drinking water. For years, experienced travelers have used Aerobic Oxygen to purify questionable drinking water. It removes chlorine in about 30 seconds and kills infectious bacteria and organisms - Salmonella, Streptococcus, E. coli, Pseudomonas, Staphylococcus, and even Guardia-Lamblia. Stored water supplies remain safe for up to five years under optimal storage conditions. As a health enhancer, Aerobic Oxygen taken as a
tonic may prove beneficial to those suffering from many health problems.
Oxygen provides life and energy to every cell and helps strengthen the immune system. Add 2 to 3 drops to your toothbrush to fight tooth decay and gum infection, or dilute and use as a mouthwash, or spray vegetables and fruit to keep them fresh. Does not affect the essential aerobic bacteria in our digestive systems. A 2-ounce bottle treats 100-gallons of potable water."