Swine manure digestate treatment using electrocoagulation

Authors

  • Rúbia Mores URI Erechim; Dept. of Agricultural Sciences
  • Airton Kunz UNIOESTE; CCET; Dept. of Agricultural Engineering
  • Juliana Steffens URI Erechim; Dept. of Agricultural Sciences
  • Rogério Marcos Dallago URI Erechim; Dept. of Agricultural Sciences
  • Toni Luis Benazzi Federal Institute of Rio Grande do Sul
  • André Cestonaro do Amaral UNIOESTE; CCET; Dept. of Agricultural Engineering

DOI:

https://doi.org/10.1590/0103-9016-2015-0269

Abstract

Anaerobic biodigestion is an appropriate alternative for the treatment of swine wastewater due to its biogas generation properties and the possibility of its application as a source of energy for heating or electricity. However, digestate can still contain high levels of turbidity, organic carbon and nutrients and must be correctly managed as a biofertilizer, or treated to avoid any impact on the environment. Considering this, electrocoagulation (EC) shows promise as a technology because of its ease of handling and high efficiency in effluent remediation. This study aimed to evaluate the performance of EC in a batch system in the treatment of swine wastewater digestate. The wastewater used in the treatment was sampled from a 10 m3 biodigestor effluent (digestate) located at Concórdia, Santa Catarina, Brazil. A batch-scale experiment was carried out to evaluate the following two variables: electrode distance (ED) and voltage applied (V). The removal efficiency levels (%) for the best operational condition (2 cm, 5 V) after 30 min were: 97 %, 98 %, 77 % and 10 % for color, turbidity, total organic carbon (TOC) and total nitrogen (TN), respectively. The EC batch system produced efficient results, underlining its promise as an alternative to be applied in the treatment of digestate.

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Published

2016-10-01

How to Cite

Mores, R., Kunz, A., Steffens, J., Dallago, R. M., Benazzi, T. L., & Amaral, A. C. do. (2016). Swine manure digestate treatment using electrocoagulation . Scientia Agricola, 73(5), 439-443. https://doi.org/10.1590/0103-9016-2015-0269

Issue

Section

Agricultural Engeneering