April 2009

Prizing the Environment

Author(s): Dele Ogunseitan

April 2009

An evaluation of a mesophilic reactor for treating wastewater from a Zimbabwean potato-processing plant

  An evaluation of anaerobic treatment of potato-processing wastewater using an up flow Anaerobic Sludge Bed (UASB) reactor at 37°C was conducted. Wastewater from a potato-processing plant in Harare, with an average of 6.8 g COD/l, (COD = chemical oxygen demand) a high concentration of total solids (up to 6725 mg/l) and low pH of 4 - 4.9 was subjected to anaerobic treatment in an UASB reactor. The start up...

Author(s): Manhokwe S., Parawira W. and Tekere, M.

April 2009

Assessment of pollution impacts on the ecological integrity of the Kisian and Kisat rivers in Lake Victoria drainage basin, Kenya

  Macro-invertebrate assemblages were used as bioindicators to assess the ecological integrity of Rivers Kisat (influenced by urban development) and Kisian (influenced by agriculture) using community attributes and the Index of Biotic Integrity. Six stations, three per river, were selected to correspond to different impact types and intensities along the rivers. Physico-chemical parameters and nutrients were...

Author(s): Kobingi, Nyakeya, Raburu, Philip Okoth, Masese, Frank Onderi and Gichuki, John