Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor
This study aimed to evaluate the influence of airflow (0.25, 0.50 and 0.75 L.L-1.min-1) and cycle time (10.45 h, 14.25 h and 17.35 h) on a sequencing batch reactor (SBR) performance in promoting nitrification and denitrification of poultry slaughterhouse wastewater. The operational stages included f...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Engenharia Agrícola
2015-06-01
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| Series: | Engenharia Agrícola |
| Subjects: | |
| Online Access: | http://www.scielo.br/pdf/eagri/v35n3/1809-4430-eagri-35-3-0567.pdf |
| _version_ | 1811191539265699840 |
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| author | Carla L. Lopes Juliana B. R. Mees Luciane Sene Karina Q. de Carvalho Divair Christ Simone D. Gomes |
| author_facet | Carla L. Lopes Juliana B. R. Mees Luciane Sene Karina Q. de Carvalho Divair Christ Simone D. Gomes |
| author_sort | Carla L. Lopes |
| collection | DOAJ |
| description | This study aimed to evaluate the influence of airflow (0.25, 0.50 and 0.75 L.L-1.min-1) and cycle time (10.45 h, 14.25 h and 17.35 h) on a sequencing batch reactor (SBR) performance in promoting nitrification and denitrification of poultry slaughterhouse wastewater. The operational stages included feeding, aerobic and anoxic reactions, sedimentation and discharge. SBR was operated in a laboratory scale with a working volume of 4 L, keeping 25% of biomass retained inside the reactor as inoculum for the next batch. In the anoxic stage, C: N ratio was maintained between 5 and 6 by adding cassava starch wastewater. A factorial design (22) with five repetitions was designed at the central point to evaluate the influence of cycle time and airflow on total inorganic nitrogen removal (N-NH4++N-NO2-+N-NO3-) and in the whole process (nitrification and denitrification). The highest total inorganic nitrogen removal (93.3%) was observed for airflow of 0.25 L.L-1.min‑1 and a cycle time of 14.25 h. At the end of the experiment, the sludge inside the reactor was characterized by fluorescent in situ hybridization (FISH), indicating the presence of ammonia and nitrite oxidizing bacteria. |
| first_indexed | 2024-04-11T15:07:28Z |
| format | Article |
| id | doaj.art-c0abf6607c394865b3463dcfb6563ca7 |
| institution | Directory Open Access Journal |
| issn | 0100-6916 |
| language | English |
| last_indexed | 2024-04-11T15:07:28Z |
| publishDate | 2015-06-01 |
| publisher | Sociedade Brasileira de Engenharia Agrícola |
| record_format | Article |
| series | Engenharia Agrícola |
| spelling | doaj.art-c0abf6607c394865b3463dcfb6563ca72022-12-22T04:16:46ZengSociedade Brasileira de Engenharia AgrícolaEngenharia Agrícola0100-69162015-06-0135356757710.1590/1809-4430-Eng.Agric.v35n3p567-577/2015Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactorCarla L. LopesJuliana B. R. MeesLuciane SeneKarina Q. de CarvalhoDivair ChristSimone D. GomesThis study aimed to evaluate the influence of airflow (0.25, 0.50 and 0.75 L.L-1.min-1) and cycle time (10.45 h, 14.25 h and 17.35 h) on a sequencing batch reactor (SBR) performance in promoting nitrification and denitrification of poultry slaughterhouse wastewater. The operational stages included feeding, aerobic and anoxic reactions, sedimentation and discharge. SBR was operated in a laboratory scale with a working volume of 4 L, keeping 25% of biomass retained inside the reactor as inoculum for the next batch. In the anoxic stage, C: N ratio was maintained between 5 and 6 by adding cassava starch wastewater. A factorial design (22) with five repetitions was designed at the central point to evaluate the influence of cycle time and airflow on total inorganic nitrogen removal (N-NH4++N-NO2-+N-NO3-) and in the whole process (nitrification and denitrification). The highest total inorganic nitrogen removal (93.3%) was observed for airflow of 0.25 L.L-1.min‑1 and a cycle time of 14.25 h. At the end of the experiment, the sludge inside the reactor was characterized by fluorescent in situ hybridization (FISH), indicating the presence of ammonia and nitrite oxidizing bacteria.http://www.scielo.br/pdf/eagri/v35n3/1809-4430-eagri-35-3-0567.pdfnitrificationdenitrificationresponse surface methodologyfluorescent in situ hybridization |
| spellingShingle | Carla L. Lopes Juliana B. R. Mees Luciane Sene Karina Q. de Carvalho Divair Christ Simone D. Gomes Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor Engenharia Agrícola nitrification denitrification response surface methodology fluorescent in situ hybridization |
| title | Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor |
| title_full | Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor |
| title_fullStr | Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor |
| title_full_unstemmed | Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor |
| title_short | Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor |
| title_sort | effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor |
| topic | nitrification denitrification response surface methodology fluorescent in situ hybridization |
| url | http://www.scielo.br/pdf/eagri/v35n3/1809-4430-eagri-35-3-0567.pdf |
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