Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process
The purpose of this study was to analyse the impact of temperature and airflow rate on the removal of COD and ammonia. This study showed for the first time that temperature has a significant impact on the removal of COD and ammonia compared with airflow rate. The impact of temperature and airflow ra...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | South African Journal of Chemical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1026918522001068 |
| _version_ | 1797955405274415104 |
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| author | M. Muloiwa M.O. Dinka S. Nyende-Byakika |
| author_facet | M. Muloiwa M.O. Dinka S. Nyende-Byakika |
| author_sort | M. Muloiwa |
| collection | DOAJ |
| description | The purpose of this study was to analyse the impact of temperature and airflow rate on the removal of COD and ammonia. This study showed for the first time that temperature has a significant impact on the removal of COD and ammonia compared with airflow rate. The impact of temperature and airflow rate on COD and ammonia removal was analysed using R², linear regression line, and ANOVA test. The results of the study showed that the highest COD removal was 157 mg/l measured at a temperature of 35 °C and airflow rate of 10 l/min. The highest ammonia removal was 15.9 mg/l measured at a temperature of 32.5 °C and airflow rate of 20 l/min. The results showed that when temperature increased, COD and ammonia removal increased linearly. R² values were 66.6% and 59.5% for COD and ammonia removal respectively. Linear regression lines were positive 2.69 mg/l and 0.3573 mg/l respectively. The ANOVA test confirmed that temperature had a significant impact on both COD (P 0.03 < 0.05) and ammonia removal (P 0.000 < 0.05). When airflow rate increased, COD and ammonia removal decreased. R² values were 44.7% and 32.5% respectively. Linear regression lines were negative 0.8343 and 0.084 respectively. The ANOVA test confirmed that airflow rate had no significant impact on both COD (P 0.525 > 0.05) and ammonia removal (P 0.902 > 0.05). The optimum operating temperature and airflow rate were 32.5 °C – 35 °C and 5 l/min–10 l/min respectively. |
| first_indexed | 2024-04-10T23:33:44Z |
| format | Article |
| id | doaj.art-3193ed59dba64b11bce417154fc9bc35 |
| institution | Directory Open Access Journal |
| issn | 1026-9185 |
| language | English |
| last_indexed | 2024-04-10T23:33:44Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | South African Journal of Chemical Engineering |
| spelling | doaj.art-3193ed59dba64b11bce417154fc9bc352023-01-12T04:18:28ZengElsevierSouth African Journal of Chemical Engineering1026-91852023-01-0143245256Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment processM. Muloiwa0M.O. Dinka1S. Nyende-Byakika2Department of Civil Engineering, Tshwane University of Technology Private Bag X680, Pretoria 0001 Staatsartillerie Road, Pretoria West, South Africa; Corresponding author.Department of Civil Engineering Science, University of Johannesburg Auckland Park Campus 2006, Box 524, Johannesburg, South AfricaDepartment of Civil Engineering Science, University of Johannesburg Auckland Park Campus 2006, Box 524, Johannesburg, South AfricaThe purpose of this study was to analyse the impact of temperature and airflow rate on the removal of COD and ammonia. This study showed for the first time that temperature has a significant impact on the removal of COD and ammonia compared with airflow rate. The impact of temperature and airflow rate on COD and ammonia removal was analysed using R², linear regression line, and ANOVA test. The results of the study showed that the highest COD removal was 157 mg/l measured at a temperature of 35 °C and airflow rate of 10 l/min. The highest ammonia removal was 15.9 mg/l measured at a temperature of 32.5 °C and airflow rate of 20 l/min. The results showed that when temperature increased, COD and ammonia removal increased linearly. R² values were 66.6% and 59.5% for COD and ammonia removal respectively. Linear regression lines were positive 2.69 mg/l and 0.3573 mg/l respectively. The ANOVA test confirmed that temperature had a significant impact on both COD (P 0.03 < 0.05) and ammonia removal (P 0.000 < 0.05). When airflow rate increased, COD and ammonia removal decreased. R² values were 44.7% and 32.5% respectively. Linear regression lines were negative 0.8343 and 0.084 respectively. The ANOVA test confirmed that airflow rate had no significant impact on both COD (P 0.525 > 0.05) and ammonia removal (P 0.902 > 0.05). The optimum operating temperature and airflow rate were 32.5 °C – 35 °C and 5 l/min–10 l/min respectively.http://www.sciencedirect.com/science/article/pii/S1026918522001068COD removalAmmonia removalTemperatureAirflow rateNitrificationBiodegradation |
| spellingShingle | M. Muloiwa M.O. Dinka S. Nyende-Byakika Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process South African Journal of Chemical Engineering COD removal Ammonia removal Temperature Airflow rate Nitrification Biodegradation |
| title | Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process |
| title_full | Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process |
| title_fullStr | Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process |
| title_full_unstemmed | Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process |
| title_short | Impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process |
| title_sort | impact of temperature and airflow rate on the removal of organic pollutants and inorganic pollutants in the biological treatment process |
| topic | COD removal Ammonia removal Temperature Airflow rate Nitrification Biodegradation |
| url | http://www.sciencedirect.com/science/article/pii/S1026918522001068 |
| work_keys_str_mv | AT mmuloiwa impactoftemperatureandairflowrateontheremovaloforganicpollutantsandinorganicpollutantsinthebiologicaltreatmentprocess AT modinka impactoftemperatureandairflowrateontheremovaloforganicpollutantsandinorganicpollutantsinthebiologicaltreatmentprocess AT snyendebyakika impactoftemperatureandairflowrateontheremovaloforganicpollutantsandinorganicpollutantsinthebiologicaltreatmentprocess |