Tratamiento de efluentes domésticos con lagunas de alta tasa, evaluación del arranque con dos porcentajes de inóculo

Iván Andrés Sánchez Ortiz; Maria Lucia  Calijuri; Rafael Kopschitz  Xavier Bastos; Adriana Barbosa  Sales De Magalhães; Janderson  Badim Bepler; Mariana  Marques Bessas; Fernando  Rodrigues Coelho; João Victor Alves  Gomes Silva

doi:10.14482/inde.42.01.001.414

Authors

Iván Andrés Sánchez Ortiz Universidad de Nariño https://orcid.org/0000-0001-7579-5969
Maria Lucia Calijuri Universidade Federal de Viçosa (UFV), Brasil https://orcid.org/0000-0002-0918-2475
Rafael Kopschitz Xavier Bastos Universidade Federal de Viçosa (UFV), Brasil https://orcid.org/0000-0001-8792-0253
Adriana Barbosa Sales De Magalhães Centro Universitário de Caratinga (UNEC), Brasil https://orcid.org/0000-0003-3473-4996
Janderson Badim Bepler Universidade Federal de Viçosa (UFV), Brasil https://orcid.org/0000-0001-8686-1781
Mariana Marques Bessas Universidade Federal de Viçosa (UFV), Brasil https://orcid.org/0000-0002-4312-026X
Fernando Rodrigues Coelho Universidade Federal de Viçosa (UFV), Brasil https://orcid.org/0000-0002-0681-1133
João Victor Alves Gomes Silva Universidade Federal de Viçosa (UFV), Brasil https://orcid.org/0000-0002-0201-951X

DOI:

https://doi.org/10.14482/inde.42.01.001.414

Keywords:

wastewater treatment, waste stabilization ponds, septic tank, pollutant removal, inoculation, effluent

Abstract

The main objective of this research was to evaluate the effect of two percentages of inoculum used for the startup of high rate algal ponds (HRAP) in the postreatment of effluent of septic tank. The HRAP1 and HRAP2 were inoculated by the substitution of 3.25 % and 6.50 % of the effective volume with liquid from a HRAP operated with a hydraulic retention time of eight days. During seven consecutive days the variables organic nitrogen (ON), total ammonia nitrogen (TAN), total phosphorous (TP), chemical oxygen demand (COD) and chlorophyll-a were measured; the phytoplankton was quantified and characterized. The chlorophyll-a concentrations in the HRAP1 varied between 451.2 and 1,802.2 µg/L and in the HRAP2 between 339.1 and 2,194.7 µg/L, the final densities of phytoplankton were respectively of 683,200 and 5’535,130 organisms/mL, with presence of individuals of the Chlorophyceae, Cryptophyceae and Euglenophyceae classes in the two ponds. The calculated removal efficiencies for the HRAP1 and HRAP2 were respectively: 37.1 and 51.6 % for ON; 89.6 and 97.3 % for TAN; 30.4 and 30.3 % for TP; -1.3 and -53.2 % for COD; 1495 and 2398 Log units for E. coli. The inoculation promoted the rapid growth of the phytoplankton communities, with best results for nitrogen removal and E. coli inactivation due the use of higher amounts of inoculum.

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