We note an absence of fecal and total coliforms at the 9th bottle that matches the break point. Thisconfirms the effect of disinfectant bleach to this concentration of chlorine (80 mg/L) for the treatedwastewater of the M’zar plant. However, the disinfection by chlorination requires mastering manyparameters (pH, temperature, turbidity, contact time, residual chlorine) that influence its effectivenessagainst the microorganisms.
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