Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process
Abstract The interaction of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) is of considerable importance in nitrification process. Ecophysiological interactions between the communities of AOB and NOB were investigated by monitoring NO2 − as the intermediate compound in an orga...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-07-01
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| Series: | Applied Water Science |
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| Online Access: | http://link.springer.com/article/10.1007/s13201-019-1017-6 |
| _version_ | 1819177915856715776 |
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| author | Arsalan Sepehri Mohammad-Hossein Sarrafzadeh |
| author_facet | Arsalan Sepehri Mohammad-Hossein Sarrafzadeh |
| author_sort | Arsalan Sepehri |
| collection | DOAJ |
| description | Abstract The interaction of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) is of considerable importance in nitrification process. Ecophysiological interactions between the communities of AOB and NOB were investigated by monitoring NO2 − as the intermediate compound in an organic carbon-depleted nitrifying activated sludge fed only NH4 + as a nitrogen source (40 mg/L). The presence of boom and bust (feast and famine) cycle successfully indicates the activity cycles of AOB and NOB through cultivation-dependent method. The maximum growth rate and yield for AOB in nitritation-dominant period were (0.67 day−1, 0.17 gVSS gN−1) and for NOB in nitratation-dominant period were (0.71 day−1, 0.072 gVSS gN−1). Soluble microbial products (SMP) and extracellular polymeric substances (EPS) generated by AOB were 1.2 and 1.8 mg/L, respectively, while NOB produced 0.6 mg/L of SMP and 1 mg/L of EPS. While NOB were low in utilization-associated products (UAP) (0.07 mg/L) and biomass-associated products (BAP) (0.12 mg/L), AOB were higher in UAP (0.15 mg/L) and BAP (0.3 mg/L). The continuation presence of zero C/N ratio, in either inlet ratio or net available ratio for the microbial community, can prolong and enhance nitratation process. NOB enrichment and nitratation intensification strategy through zero C/N ratio are able to reduce remarkably microbial metabolites 50% lower than conventional process and enhance nitrification efficiency in activated sludge-involved processes. |
| first_indexed | 2024-12-22T21:34:15Z |
| format | Article |
| id | doaj.art-439c95f7cf594c27a736ea8b077ad0a2 |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-12-22T21:34:15Z |
| publishDate | 2019-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-439c95f7cf594c27a736ea8b077ad0a22022-12-21T18:11:48ZengSpringerOpenApplied Water Science2190-54872190-54952019-07-019511210.1007/s13201-019-1017-6Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification processArsalan Sepehri0Mohammad-Hossein Sarrafzadeh1UNESCO Chair on Water Reuse, School of Chemical Engineering, College of Engineering, University of TehranUNESCO Chair on Water Reuse, School of Chemical Engineering, College of Engineering, University of TehranAbstract The interaction of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) is of considerable importance in nitrification process. Ecophysiological interactions between the communities of AOB and NOB were investigated by monitoring NO2 − as the intermediate compound in an organic carbon-depleted nitrifying activated sludge fed only NH4 + as a nitrogen source (40 mg/L). The presence of boom and bust (feast and famine) cycle successfully indicates the activity cycles of AOB and NOB through cultivation-dependent method. The maximum growth rate and yield for AOB in nitritation-dominant period were (0.67 day−1, 0.17 gVSS gN−1) and for NOB in nitratation-dominant period were (0.71 day−1, 0.072 gVSS gN−1). Soluble microbial products (SMP) and extracellular polymeric substances (EPS) generated by AOB were 1.2 and 1.8 mg/L, respectively, while NOB produced 0.6 mg/L of SMP and 1 mg/L of EPS. While NOB were low in utilization-associated products (UAP) (0.07 mg/L) and biomass-associated products (BAP) (0.12 mg/L), AOB were higher in UAP (0.15 mg/L) and BAP (0.3 mg/L). The continuation presence of zero C/N ratio, in either inlet ratio or net available ratio for the microbial community, can prolong and enhance nitratation process. NOB enrichment and nitratation intensification strategy through zero C/N ratio are able to reduce remarkably microbial metabolites 50% lower than conventional process and enhance nitrification efficiency in activated sludge-involved processes.http://link.springer.com/article/10.1007/s13201-019-1017-6Activated sludgeNitriteAOBFoulingNOBNitrification |
| spellingShingle | Arsalan Sepehri Mohammad-Hossein Sarrafzadeh Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process Applied Water Science Activated sludge Nitrite AOB Fouling NOB Nitrification |
| title | Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process |
| title_full | Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process |
| title_fullStr | Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process |
| title_full_unstemmed | Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process |
| title_short | Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process |
| title_sort | activity enhancement of ammonia oxidizing bacteria and nitrite oxidizing bacteria in activated sludge process metabolite reduction and co2 mitigation intensification process |
| topic | Activated sludge Nitrite AOB Fouling NOB Nitrification |
| url | http://link.springer.com/article/10.1007/s13201-019-1017-6 |
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