Impact of treatment plant management on human health and ecological risks from wastewater irrigation in developing countries–case studies from Cochabamba, Bolivia
Journal article, 2019

Wastewater irrigation is a common practice in developing countries due to water scarcity and increasing demand for food production. However, there are health risks and ecological risks associated with this practice. Small-scale wastewater treatment plants (WWTPs) intend to decrease these risks but still face management challenges. This study assessed how the management status of five small-scale WWTPs in Cochabamba, Bolivia affects health risks associated with consumption of lettuce and ecological risks due to the accumulation of nutrients in the soil for lettuce and maize crops. Risk simulations for three wastewater irrigation scenarios were: raw wastewater, actual effluent and expected effluent. Results showed that weak O&M practices can increase risk outcomes to higher levels than irrigating with raw wastewater. Improving O&M to achieve optimal functioning of small-scale WWTPs can reduce human health risks and ecological risks up to 2 log10 DALY person−1 year−1 and to 2 log10 kg nitrogen ha−1 accumulated in soil, respectively.

quantitative microbial risk assessment

operation and maintenance

ecological risks

Wastewater irrigation

small-scale WWTPs

Author

Claudia Cossio Grageda

Chalmers, Architecture and Civil Engineering, Water Environment Technology

University of San Simón

Luis Fernando Perez-Mercado

Swedish University of Agricultural Sciences (SLU)

University of San Simón

Jenny Norrman

Chalmers, Architecture and Civil Engineering, GeoEngineering

Sahar Dalahmeh

Swedish University of Agricultural Sciences (SLU)

Björn Vinnerås

Swedish University of Agricultural Sciences (SLU)

Alvaro Mercado

University of San Simón

Jennifer R Mc Conville

Swedish University of Agricultural Sciences (SLU)

International Journal of Environmental Health Research

0960-3123 (ISSN) 1369-1619 (eISSN)

Vol. In Press

Subject Categories

Environmental Sciences related to Agriculture and Land-use

Water Engineering

Environmental Sciences

DOI

10.1080/09603123.2019.1657075

PubMed

31475566

More information

Latest update

10/21/2019