Effects of Enhanced A/O-MBR on Treating Domestic Sewage with Low C/N Ratio and Membrane Fouling
By adding polyurethane foam (PUF) carriers in a conventional A/O-MBR (CMBR),an enhanced A/O-MBR (HMBR) is developed and operates in parallel with CMBR to treat domestic sewage with a low C/N ratio.The results reveal that the effluent quality by HMBR is significantly better than that by CMBR.The aver...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2022-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2022.04.014 |
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| Summary: | By adding polyurethane foam (PUF) carriers in a conventional A/O-MBR (CMBR),an enhanced A/O-MBR (HMBR) is developed and operates in parallel with CMBR to treat domestic sewage with a low C/N ratio.The results reveal that the effluent quality by HMBR is significantly better than that by CMBR.The average removal rates of COD,ammonia nitrogen,and total nitrogen by HMBR are 83.88%,67.24%,and 50.39%,respectively,while those by CMBR are 81.96%,59.97%,and 46.32%,respectively.In addition,HMBR and CMBR reach the lowest membrane flux,i.e.,0.19 and 0.20 L/(m<sup>2</sup>·h),on the 46th and 70th days of continuous operation,respectively.HMBR can effectively prolong the operation time of the membrane module and reduce the degree of fouling,and it can recover to 46.50% of the initial membrane flux after physical flushing and 93.7% of the initial membrane flux after physical-chemical washing.Therefore,the addition of PUF carriers not only strengthens the treatment performance of A/O-MBR but also effectively reduces membrane fouling. |
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| ISSN: | 1001-9235 |