Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures
The main goal of the present study was to examine the operating characteristics and mechanisms of membrane fouling in integrated membrane bioreactors (IMBRs) at diff erent temperatures. Two IMBRs, each with identical dimensions and confi gurations, were used in the study using synthetic domestic sew...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2020-06-01
|
| Series: | Archives of Environmental Protection |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/116616/PDF/Archives%2046%20no%202p3_11.pdf |
| _version_ | 1797394319180562432 |
|---|---|
| author | Yaqin Yu |
| author_facet | Yaqin Yu |
| author_sort | Yaqin Yu |
| collection | DOAJ |
| description | The main goal of the present study was to examine the operating characteristics and mechanisms of membrane fouling in integrated membrane bioreactors (IMBRs) at diff erent temperatures. Two IMBRs, each with identical dimensions and confi gurations, were used in the study using synthetic domestic sewage at a low temperature (10°C) and high temperature (25°C). The results indicated that the removal effi ciency of chemical oxygen demand reached 93–96%, but the membrane contribution rate of IMBR2 (10°C) was higher than that of IMBR1 (25°C). The separation burden of the membrane on organic compounds increased at low temperature, which may have sped up the rate of membrane biofouling. The absolute rate of trans-membrane pressure build-up was faster at low temperature, leading to shorter IMBR operating times. Soluble microbial products (SMPs) and extracellular polymeric substances (EPSs) in the IMBRs signifi cantly increased at low temperature. These substances intensifi ed defl occulation, with an accompanying reduction of fl oc size and the release of EPSs at low temperature, which facilitated the formation of cake foulants on the surface, covering the entire membrane area. The protein and polysaccharide concentrations of SMPs and EPSs in the IMBRs were correlated with the concentration of C8-HSL. It was demonstrated that temperature aff ected the concentration of C8-HSL, which controlled the excretion of EPSs and SMPs and thus the membrane biofouling process. |
| first_indexed | 2024-03-09T00:17:57Z |
| format | Article |
| id | doaj.art-1089e812259d4c2a96dadf8f5b319728 |
| institution | Directory Open Access Journal |
| issn | 2083-4772 2083-4810 |
| language | English |
| last_indexed | 2024-03-09T00:17:57Z |
| publishDate | 2020-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Environmental Protection |
| spelling | doaj.art-1089e812259d4c2a96dadf8f5b3197282023-12-12T06:54:12ZengPolish Academy of SciencesArchives of Environmental Protection2083-47722083-48102020-06-01vol. 46No 2311https://doi.org/10.24425/aep.2020.133469Study on biofouling mechanism in IMBR for wastewater treatment with different temperaturesYaqin Yu0Department of Civil Engineering, Yancheng Institute of Technology, ChinaThe main goal of the present study was to examine the operating characteristics and mechanisms of membrane fouling in integrated membrane bioreactors (IMBRs) at diff erent temperatures. Two IMBRs, each with identical dimensions and confi gurations, were used in the study using synthetic domestic sewage at a low temperature (10°C) and high temperature (25°C). The results indicated that the removal effi ciency of chemical oxygen demand reached 93–96%, but the membrane contribution rate of IMBR2 (10°C) was higher than that of IMBR1 (25°C). The separation burden of the membrane on organic compounds increased at low temperature, which may have sped up the rate of membrane biofouling. The absolute rate of trans-membrane pressure build-up was faster at low temperature, leading to shorter IMBR operating times. Soluble microbial products (SMPs) and extracellular polymeric substances (EPSs) in the IMBRs signifi cantly increased at low temperature. These substances intensifi ed defl occulation, with an accompanying reduction of fl oc size and the release of EPSs at low temperature, which facilitated the formation of cake foulants on the surface, covering the entire membrane area. The protein and polysaccharide concentrations of SMPs and EPSs in the IMBRs were correlated with the concentration of C8-HSL. It was demonstrated that temperature aff ected the concentration of C8-HSL, which controlled the excretion of EPSs and SMPs and thus the membrane biofouling process.https://journals.pan.pl/Content/116616/PDF/Archives%2046%20no%202p3_11.pdfquorum sensingextracellular polymeric substancesbiofoulingintegrated membrane bioreactortrans-membrane pressuresoluble microbial products |
| spellingShingle | Yaqin Yu Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures Archives of Environmental Protection quorum sensing extracellular polymeric substances biofouling integrated membrane bioreactor trans-membrane pressure soluble microbial products |
| title | Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures |
| title_full | Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures |
| title_fullStr | Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures |
| title_full_unstemmed | Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures |
| title_short | Study on biofouling mechanism in IMBR for wastewater treatment with different temperatures |
| title_sort | study on biofouling mechanism in imbr for wastewater treatment with different temperatures |
| topic | quorum sensing extracellular polymeric substances biofouling integrated membrane bioreactor trans-membrane pressure soluble microbial products |
| url | https://journals.pan.pl/Content/116616/PDF/Archives%2046%20no%202p3_11.pdf |
| work_keys_str_mv | AT yaqinyu studyonbiofoulingmechanisminimbrforwastewatertreatmentwithdifferenttemperatures |