Effect of convergent rays on coliform and total culturable heterotrophic bacteria in water.

Aims: Verification of the effect of convergent rays on coliform and total culturable heterotrophic bacteria counts (TCHBC) in River (surface water), well and borehole (underground) water bodies around Choba and Aluu communities. Place and Duration of Study : The efficiency of convergent ray’s disinfection of surface (Rivers) and underground (well and Borehole) water bodies was conducted on Choba and Aluu communities water samples in River State, Nigeria in the Department of Microbiology laboratory, University of Port Harcourt between November, 2012 to December, 2013. Methodology: Different volumes of water samples were exposed to converged rays for 0, 2, 4, 6 and 8 hours intervals using a circular - dish ray concentrator covered with Aluminum foil paper as the refl ecting material. The TCHBC was determined using bacterial plate counts while the coliform population was determined using the most probable number multiple tube technique. Result s : The study showed that coliform and TCHBC population had the same logarithmi c values at 0 hour and after 2 hours of exposure (1.2 logMPN/100 ml and 2.2 log cfu/ml). The coliform