Open AccessEvaluation of the performance of covered lagoon digester in terms of the solids loading
Author(s) -
Izabelle de Paula Sousa,
André Pereira Rosa,
Juciara Oliveira Lopes,
Alisson Carraro Borges,
Baltzar dos Reis Magos,
Matheus de Souza Soares
Publication year - 2021
Publication title -
engenharia na agricultura
Language(s) - English
Resource type - Journals
eISSN - 2175-6813
pISSN - 1414-3984
DOI - 10.13083/reveng.v29i1.11568
Subject(s) - total dissolved solids , environmental science , total suspended solids , anaerobic exercise , suspended solids , biomass (ecology) , wastewater , hydraulic retention time , nutrient , volatile suspended solids , anaerobic digestion , waste management , environmental engineering , sewage treatment , pulp and paper industry , chemical oxygen demand , engineering , medicine , ecology , biology , physiology , methane
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.