Treatment in the Peruvian Highlands Using Indigenous Consortia with Bacillus sp. and Chlorella vulgaris

Espinoza S.; Ccanto S.; Mercado E.; Avila J. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2025) · DOI: 10.18687/laccei2025.1.1.1169

Resumen

The treatment of wastewater in Lucanas, Ayacucho, employed indigenous consortia of Chlorella vulgaris and Bacillus sp. Initial analyses showed thermotolerant coliform levels exceeding established limits. After 4 days, the treatment achieved a 73% reduction compared to 62.8% without treatment. Samples from nearby water bodies were collected to isolate and characterize indigenous microorganisms, which were applied in a laboratory-scale experimental system with hydraulic retention times of 24 and 48 hours. The results showed an average coliform reduction of 65.56% at 24 hours and 71.77% at 48 hours, with statistically significant differences compared to untreated controls. The combined use of Chlorella vulgaris (3,820,000 cells/mL) and Bacillus sp. proved to be an effective, economical, and adaptable solution for contexts in the Peruvian highlands.

Instituciones: Universidad Peruana de Ciencias Aplicadas