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By a system of biological sewage treatment ponds PBS set up a little test site. We simulated a sewage water flow of around 100 litres per hour, which is corresponding to a wastewater treatment/sewage system for about 20 people (counting a standard of 120 litres per person over 24 h). In this case we first collected 800 litres of sewage water from the first pond where water is let out directly from the septic tank/sludge separator, i.e. water with very high content of microbial contamination as well as other pollutants common in sewage water. Then we treated this water with one of our (H)units over given time periods, eg. 4h and 8h, and analysed the samples.
To get a better understanding, please watch this video (Note: I say we simulate a flow from a small household system, which is wrong. It is the above figures that are correct):
We see some very interesting results and proof of concept. Basically, we kill the microbial contamination and reduce the biological and chemical pollution significantly.
In regards of bacterial levels, this heavily contaminated water had after 8 hours of our treatment ”swimming water quality”, i.e. the levels required at shorelines and beaches.
The samples are taken from the flowing water (hose) going back into the raw water tank after it being circulated a certain time.
Here follows an extract:
|Analysed parameter||Untreated reference||PBS treatment 4h||PBS treatment 8h|
|E.Coli (cfu/100 ml)||35 000||–||<10|
|Coliform bacteria (cfu/100 ml)||>100 000||4 000||99|
|Intestinal enterococci (cfu/100 ml)||4100||–||<10|
|Color (mg/l Pt)||100||40||25|
|Total phosphorus (mg/l)||1,9||–||0.68|
|Total nitrogen (mg/l)||30||–||27|
Welcome to contact us for lab reports and further info. Cheers!Full article →
This week we received the test results (Synlab) on our most recent tests 2021-03-01 where we disinfected kegs from a brewery.
We are here simulating to replace their own disinfection step in their cleaning process, which includes hot water rinsing, and instead flowing our gas mix through the kegs.
Welcome to contact us to see the lab reports. The results where we found the right settings were great.
””Keg 6” was the most polluted keg so far, where we had let microbial contamination grow for a while and one week earlier also scooped around a liter of wastewater, which we then emptied. So it was heavily contaminated.
After 7 minutes of our treatment, we have completely disinfected the 20 litre keg from:
- Slow growing bacteria
- Cultivable microorganisms
- E coli
- Intestinal enterococci
- Coliform bacteria
This results in significant savings in both water and energy use, compared to the hot water treatment.
To be continued….”
We are proud to be part of sWASH & Grow, a Vinnova UDI-3 project (Challenge-Driven Innovation) led by RISE – Research Institutes of Sweden. This was granted at the end of June 2020 and formally started on 1 September 2020. The project aims to bring out the right innovation to the right (vulnerable/exposed) area in the world and the niche is off-grid and WaSH innovations (Water, Sanitation and Hygiene). We participate in this project together with a large group of well-known NGO’s, public agencies, research and innovation institutes, and other innovation companies.https://www.swashgrow.org/Full article →