Turbidity and free residual chlorine for monitoring plants comprised by septic tank followed by anaerobic filter

Authors

  • Fernando José Araújo da Silva Universidade Federal do Ceará
  • Raimundo Oliveira de Souza Universidade Federal do Ceará

DOI:

https://doi.org/10.4025/actascitechnol.v33i4.9603

Keywords:

anaerobic systems, effluent control, turbidity, free residual chlorine

Abstract

Grouped monitoring data of 16 wastewater treatment plants was investigated. The plants were comprised by septic tanks followed by anaerobic filters and effluent disinfection with sodium hypochlorite. Removal of COD and total suspended solids was about 55%. This number was below values observed by the literature. However, the results were in accordance with recent findings in Brazilian full-scale plants. Coliform removal was about 3.0 log units with better results for Escherichia coli (3.5 logs). Best results were achieved with free residual chorine concentrations ranging from 2.0 to 2.5 mg L-1. Findings showed that turbidity is a useful parameter to estimate COD and TSS concentrations in the treated effluent. Free residual chlorine may also be applied to estimate coliform numbers.

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Author Biography

Fernando José Araújo da Silva, Universidade Federal do Ceará

Engenheiro Civil. MS Eng. Civil. Prof. Assistente. Curso de Engenharia Civil, UFC. Campus Cariri

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Published

2011-04-14

How to Cite

Silva, F. J. A. da, & Souza, R. O. de. (2011). Turbidity and free residual chlorine for monitoring plants comprised by septic tank followed by anaerobic filter. Acta Scientiarum. Technology, 33(4), 407–413. https://doi.org/10.4025/actascitechnol.v33i4.9603

Issue

Vol. 33 No. 4 (2011)

Section

Civil Engineering

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