Figure 1
From: Laundry wastewater treatment using a combination of sand filter, bio-char and teff straw media
Setup for producing the bio-char: Two drum (b,c) where used which were filled with chopped eucalyptus wood chips (5–10 cm thickness, 8–13 cm length) and burnt till the temperature reaches between 550–850 °C for 2 hours in pyrolyzer drum. (a) When chimney starts producing white smoke is the indicator for the biochar production completion.
