Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives
This study aimed to undertake an environmental life cycle assessment (LCA) of a sewage treatment plant (STP) equipped with low-rate trickling filters (TFs) as post-treatment of upflow anaerobic sludge blanket (UASB). The STP is located in South Brazil and uses landfill and agriculture as sludge-disp...
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doaj-9644c70f08a94da29dc495b251c570792021-07-17T00:05:16ZengInstituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)Revista Ambiente & Água1980-993X2021-06-0116311410.4136/ambi-agua.2648Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternativesKarina Guedes Cubas do Amaral0https://orcid.org/0000-0002-8479-587XJulio Cezar Rietow1https://orcid.org/0000-0002-5467-6108Miguel Mansur Aisse2https://orcid.org/0000-0003-4620-559XDepartamento de Hidráulica e Saneamento (DHS). Universidade Federal do Paraná (UFPR), Avenida Coronel Francisco Heráclito dos Santos, n° 100, CEP: 81530-000, Curitiba, PR, Brazil. Departamento de Hidráulica e Saneamento (DHS). Universidade Federal do Paraná (UFPR), Avenida Coronel Francisco Heráclito dos Santos, n° 100, CEP: 81530-000, Curitiba, PR, Brazil. Departamento de Hidráulica e Saneamento (DHS). Universidade Federal do Paraná (UFPR), Avenida Coronel Francisco Heráclito dos Santos, n° 100, CEP: 81530-000, Curitiba, PR, Brazil. This study aimed to undertake an environmental life cycle assessment (LCA) of a sewage treatment plant (STP) equipped with low-rate trickling filters (TFs) as post-treatment of upflow anaerobic sludge blanket (UASB). The STP is located in South Brazil and uses landfill and agriculture as sludge-disposal alternatives. The evaluation was performed using the LCA technique and SimaPro® 9 software. The results revealed that the gases methane (CH4) and sulfur dioxide (SO2), emitted into the atmosphere after the partial burning of the biogas in flares, are mainly responsible for impacts in the categories of global warming (GW) and terrestrial acidification (TA), respectively. Due to the low rate of hydraulic sewage application in TFs, nitrous oxide (N2O) emissions stood out due to their high impact in the category of stratospheric ozone depletion (SOD). The use of sludge in agriculture obtained a greater potential for environmental impact compared to landfills in five of the eight categories evaluated. The main impacts of agricultural use were in the category of human toxicity (HT), due to the high concentration of zinc present in the sludge, and in the category TA, due to the emission of ammonia (NH3) during hygienization of the sludge. In turn, the main positive aspects were avoided products, such as urea, phosphate fertilizer and limestone. The results contribute to a greater discussion of sewage-treatment processes, as well as sludge-management alternatives used in developing countries. https://www.scielo.br/j/ambiagua/a/mrJSYNtyRDhRzybV4z8r6pM/?lang=enalkaline stabilizationbiogasbiological sludgeenvironmental assessmentnitrogen dioxidesanitary landfill |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Karina Guedes Cubas do Amaral Julio Cezar Rietow Miguel Mansur Aisse |
spellingShingle |
Karina Guedes Cubas do Amaral Julio Cezar Rietow Miguel Mansur Aisse Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives Revista Ambiente & Água alkaline stabilization biogas biological sludge environmental assessment nitrogen dioxide sanitary landfill |
author_facet |
Karina Guedes Cubas do Amaral Julio Cezar Rietow Miguel Mansur Aisse |
author_sort |
Karina Guedes Cubas do Amaral |
title |
Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives |
title_short |
Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives |
title_full |
Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives |
title_fullStr |
Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives |
title_full_unstemmed |
Evaluation of the environmental life cycle of an STP that employs a low-rate trickling filter as post-treatment of a UASB reactor and different sludge-management alternatives |
title_sort |
evaluation of the environmental life cycle of an stp that employs a low-rate trickling filter as post-treatment of a uasb reactor and different sludge-management alternatives |
publisher |
Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi) |
series |
Revista Ambiente & Água |
issn |
1980-993X |
publishDate |
2021-06-01 |
description |
This study aimed to undertake an environmental life cycle assessment (LCA) of a sewage treatment plant (STP) equipped with low-rate trickling filters (TFs) as post-treatment of upflow anaerobic sludge blanket (UASB). The STP is located in South Brazil and uses landfill and agriculture as sludge-disposal alternatives. The evaluation was performed using the LCA technique and SimaPro® 9 software. The results revealed that the gases methane (CH4) and sulfur dioxide (SO2), emitted into the atmosphere after the partial burning of the biogas in flares, are mainly responsible for impacts in the categories of global warming (GW) and terrestrial acidification (TA), respectively. Due to the low rate of hydraulic sewage application in TFs, nitrous oxide (N2O) emissions stood out due to their high impact in the category of stratospheric ozone depletion (SOD). The use of sludge in agriculture obtained a greater potential for environmental impact compared to landfills in five of the eight categories evaluated. The main impacts of agricultural use were in the category of human toxicity (HT), due to the high concentration of zinc present in the sludge, and in the category TA, due to the emission of ammonia (NH3) during hygienization of the sludge. In turn, the main positive aspects were avoided products, such as urea, phosphate fertilizer and limestone. The results contribute to a greater discussion of sewage-treatment processes, as well as sludge-management alternatives used in developing countries. |
topic |
alkaline stabilization biogas biological sludge environmental assessment nitrogen dioxide sanitary landfill |
url |
https://www.scielo.br/j/ambiagua/a/mrJSYNtyRDhRzybV4z8r6pM/?lang=en |
work_keys_str_mv |
AT karinaguedescubasdoamaral evaluationoftheenvironmentallifecycleofanstpthatemploysalowratetricklingfilterasposttreatmentofauasbreactoranddifferentsludgemanagementalternatives AT juliocezarrietow evaluationoftheenvironmentallifecycleofanstpthatemploysalowratetricklingfilterasposttreatmentofauasbreactoranddifferentsludgemanagementalternatives AT miguelmansuraisse evaluationoftheenvironmentallifecycleofanstpthatemploysalowratetricklingfilterasposttreatmentofauasbreactoranddifferentsludgemanagementalternatives |
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