by Jan Willem Foppen, re-posted from T-GroUP
Arusha is one of the faster-growing cities in Tanzania. The urbanization process is causing multiple interconnected problems. The first arena meeting organized as part of the T-Group Arusha Transition Management process was held by the local transition team with the aim to identify the existing community problems in Arusha. Below we briefly describe the findings from the first Arena meeting.
Shallow groundwater wells, are the main source of drinking water in many rural and peri-urban communities.
The quantity and variety of shallow wells located in such communities make them more readily accessible than private or government operated deep boreholes, but shallow wells are more susceptible to faecal contamination, which is often due to leaching pit latrines.
For this reason, online monitoring of water quality in shallow wells, in terms of faecal pollution, could dramatically improve understanding of acute health risks in unplanned peri-urban settlements.
More broadly, inexpensive online faecal pollution risk monitoring is also highly relevant in the context of managed aquifer recharge via the infiltration of either stormwater or treated wastewater into the subsurface for aquifer storage and recovery.
To tackle this challenge, IN-GROUND – an UPGro Catalyst Project – trialled four different types of Microbial Fuel Cell (MFC) water quality biosensor in the lab (Newcastle University, UK) and in the field (Dar Es Salaam, Tanzania).
While further work is needed, the results provided proof-of-concept that these biosensors can provide continuous groundwater quality monitoring at low cost and without need for additional chemicals or external power input.
Full details of the work can be founded in this open access paper: Velasquez-Orta SB, Werner D, Varia J, Mgana S. Microbial fuel cells for inexpensive continuous in-situ monitoring of groundwater quality. Water Research 2017, 117, 9-17.
For more details contact Dr Sharon Velasquez-Orta
By Carlos Enrique Aponte Rivero and Michelle Kooy @ http://t-group.science
Osunyai is one of the newest Wards of Arusha city. The Ward is next to our project areas of Unga Ltd and Sombetini and shares many of the same characteristics in terms of water access. Most of the residents in Osunyai are low – income, and there is also a large population of tenants. The tenants rent one room for their entire family, for anywhere between 25,000-50,000 TZ shillings/month. These are some of the lowest rental rates across the city, and these Wards provide an important housing stock for poorest residents, often working in informal employment (trading, street business, food vendors).
Continue reading A little story of an abandoned – but busy- borehole
