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I've come across this product that claims cleaning of sewage systems without the use of dangerous toxic chemicals. It's produced by Unitor, it's called Gamazyme 700FN and it uses specialised bacteria to digest grease, fats, sewage, starch and other organic compounds. Do you have any experience...

Here are additional information: The problem is bad odour in only one of streets from this part of the city. The cause is in combination of factors. First part of the street (and sewer) long about 100m is ocupied with ten households. They produce more or less constant output of wastewater that...

Thanks for your reply. This part intrigued me: unless the "fresh" WW has a very good DO concentration. Since we are dealing with households, i'd like to know are there any cleaning products or detergents that increase DO concentration? What are the chemicals we should look for in these...

Is mixing of the old, anaerobic wastewater with the same ammount of fresh wastewater going to decrease or increase generation of the hydrogen sulfide that already began within the sewer line? Will new amounts of dissolved oxygen terminate anaerobic bacteria activity or is it to late for that...