Analysis of the environmental impact on a stream: is only tannery to blame?
Luciano Gomes1, Estela P Troiani, Jorge Nozaki
1Departamento de Química, Universidade Estadual de Maringá, CEP 87020-900, Maringá, PR, Brazil. lucianogomeslg@gmail.com
Abstract:
The contribution of wastewater from a tannery industry to the pollution of a stream was investigated. The main parameters studied were biochemical oxygen demand, chemical oxygen demand, chromium, dissolved oxygen, fecal and total coliforms, nitrogen, oils and greases, pH, phosphorous, sulfides, suspended solids, turbidity, and volatile solids. Three sampling points were located: (1) at the discharge point of tannery wastewater, (2) 50 m upstream, and (3) 80 m downstream of discharge point. Also was investigated the pollution at the stream source.
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