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Detergents as a Source of Phosphorus in Sewage: the Current Situation in Brazil

  • Claudia Maria Gomes de QuevedoEmail author
  • Wanderley da Silva Paganini
Article

Abstract

The domestic use of powder detergents designed for cleaning fabrics may contribute to the phosphorus input in sewage. Hence, the regulation of the use of phosphorus in these products is considered a measure that can improve water quality, in addition to contributing to the preservation of nutrient reserves and promoting the reduction of costs involved in the implementation, operation, and maintenance of sewage systems. To evaluate the contribution of detergents in the total amount of phosphorus present in the wastewater based on the current scenario experienced in Brazil, analyses were performed in the tributary wastewater in three wastewater treatment plants (WWTPs) situated in different regions of the state of São Paulo, Brazil, as well as the analysis of 30 samples of detergents sold in the national territory. We verified that the products currently sold in the country have low concentration of phosphorus, up to 0.01 % by weight. Thus, the contribution of detergents to the total amount of phosphorus present in the wastewater of the studied WWTPs is fairly low, in the range of 0.0014 g/inh.day. Such contribution corresponds to about 0.17 % of the total amount of phosphorus present in the wastewater. Results show that it is necessary to revise and to reduce the values stipulated by existing legislation in order to regulate the operating conditions currently practiced by the productive sector and to provide the maintenance of this relevant source of phosphorus in sewage under control.

Keywords

Phosphorus Detergents Sewage Water quality 

Notes

Compliance with Ethical Standards

Funding

This study was developed at University of Sao Paulo (USP) and was not funded.

Conflict of Interest

The authors declare that they have no competing interests.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Claudia Maria Gomes de Quevedo
    • 1
    Email author
  • Wanderley da Silva Paganini
    • 1
  1. 1.Environmental Health Department, College of Public HealthUniversity of Sao Paulo (USP)Sao PauloBrazil

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