Throughout the month of December, the liquid team focused on testing out the new baffle tank design. The new baffle tank is a great success with data showing it improves effluent qualities surrounding social acceptability. We have also gained valuable information on potential system parameters that may be adjusted to further enhance the electrochemical process and effluent qualities. During the month of January the liquid team will focus on exploring and optimizing these parameters
The graphs presented below highlight the effluent differences between the older baffle design (alpha) and the new one (beta 2.0). From the top graph, we can see it takes nearly twice as much material (on a user-day equivalent basis) for the conductivity (which reflects the accumulation of salts in our recycled process liquid) to reach its plateau in the new system. In the bottom graph, the total suspended solids (TSS), a measurement related to the turbidity, or cloudiness of the effluent, are consistently lower with the new baffle design. Both of these improvements are attributable to the superior design of the new baffle system.
A new fully automated Beta 2.0 system was recently installed at the RTI testing laboratory in the US.
This biggest change for the liquid system was a redesign of the baffle tank. The new design helps to direct flow away from the outlet. This new system has been up and running for 65 days and has processed over 10 kg of feces and 100 L of urine.
We will continue to test in this new system to develop and refine processes that allow us to not only disinfect the effluent, but meet social expectations and discharge standards.
The video below shows a flush with green food coloring being followed by a flush with water in the new tank.
Recently I stumbled upon this great video from IDE Wash about the creation of their “Easy Latrine 2.0” in Cambodia and how the new design of it was heavily influenced by human centered design. I particularly love how much the video focuses on the phases they went through during the HCD process.
It’s not terribly long and highly informative. Have a watch:
One of the most important aspects of our project has been the informed decisions we have made while engineering our sanitation system. Without the vital input we’ve received from our users, we would pour every resource we had into a sanitation solution that no one would ever use.
Through our on-sitefield testing, we’ve harvested data from the very people our toilet will help. It’s through that interaction and observation that we’ve been able to create a complete sanitation system that people will use and want to interact with on a daily basis.
This adorable video from Hundustan Unilever Limited, is not only a cute way to inform and promote basic (yet vital) sanitation practices, it’s also astute commentary on how educating younger generations is a powerful tool to change old habits.
Our last post, touched on this topic and this video is a wonderful follow up.
“Watch and share Hindustan Unilever Limited’s new video to know how three simple habits is all it takes to prevent illness Haath, Munh Aur Bum, Bimari Hogi Kum – sounds gibberish ? No. They stand for three simple and healthy habits that can go a long way in preventing illness.
Haath – wash your hands five times a day with soap