Evaluation of the performance of covered lagoon digester in terms of the solids loading

Authors

DOI:

https://doi.org/10.13083/reveng.v29i1.11568

Keywords:

Anaerobic digestion, Pig farming, Manure treatment

Abstract

The use of anaerobic digesters to convert residual biomass for energy use and nutrient recovery has been increasingly indicated by the operational simplicity and added value of the treatment by-products. However, the levels of solids present in the influents to be treated directly influence the operation and management of the system. Thus, the objective of the study was to evaluate the performance of covered lagoon digesters in terms of the solids loading in the swine wastewater treatment system. The study was performed in a farm located in Zona da Mata Mineira. The monitoring took place from September 2018 to August 2019. The influent flow of waste was estimated based on the analysis of monthly water consumption on the farm. The collection and sampling took place weekly, the influents and effuents were analyzed in terms of the solids loading of total solids (TS) and volatiles solids (VS). The mean total flow distributed to the two digesters was 102.3 m³.d-1, with a mean hydraulic retention time (HRT) of 24.5 days. The results ranged from 1.14 to 2.83% for TS at the start of treatment. In most of the monitored months, anaerobic digesters were being fed with organic overload in terms of VS, which consequently affected the efficiency of the system, which were 33.6% for TS and 39.5% for VS.

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Published

2021-03-14

How to Cite

Sousa, I. de P., Rosa, A. P., Lopes, J. O., Borges, A. C., Magos, B. dos R., & Soares, M. de S. (2021). Evaluation of the performance of covered lagoon digester in terms of the solids loading. Engineering in Agriculture, 29(Contínua), 12–16. https://doi.org/10.13083/reveng.v29i1.11568

Issue

Vol. 29 No. Contínua (2021)

Section

Water and environmental resources

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