Domestic sludge and fish pond effluents in the municipality of Pentecoste, Ceará State, Brazil - doi: 10.4025/actascitechnol.v34i4.12004

The present work aimed to compare the physical and chemical quality of domestic sludge in the city of Pentecoste, State of Ceará, Brazil, to fish pond effluents from the Aquaculture Research Center of the Departamento Nacional de Obras Contras as Secas – DNOCS, located in the same city. The work was carried out in Pentecoste (State of Ceará, Brazil) in three sampling campaigns, with 30-day intervals between them. In each campaign, four samples were collected at different points of the following sites: (1) fish pond supply channel from the Aquaculture Research Center (CPAq) of the DNOCS; (2) fish pond drainage channel of CPAq/DNOCS; (3) tap water from four homes in Pentecoste; and (4) domestic sludge channel of Pentecoste. In the lab, samples were analyzed for dissolved oxygen, total ammonia, free CO 2 , nitrite, reactive phosphorus, electric conductivity and chemical oxygen demand (COD), following standard methods. It was concluded that Pentecoste’s domestic sludge has a much stronger eutrophication impact on the receiving water than that caused by the CPAq/DNOCS’s fish pond effluents.