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Comparative Evaluation of Low-Cost Ceramic Filter and Polymeric Micro Filter in Algal Membrane Bioreactor for Wastewater Treatment
Md Shafiquzzaman
Md. Mahmudul Hasan
Husnain Haider
Abdelkader T. Ahmed
Shaikh Abdur Razzak
出版
SSRN
, 2023
URL
http://books.google.com.hk/books?id=lpFR0AEACAAJ&hl=&source=gbs_api
註釋
Algal-based Membrane Bioreactor (AMBR) has been proven as a highly energy-efficient process for treating domestic wastewater. This study compared the application of polymeric microfiltration (PMF) and a low-cost ceramic filtration (LCF) to the Algal-based Membrane Bioreactor (AMBR) process for treating domestic wastewater with low and high organic pollution levels. The study conducted experiments over 57 days using two PMF-AMBRs and two LCF-AMBRs, operating on a 12-hour dark/light cycle in a continuous mode. Simulated wastewater containing varying levels of chemical oxygen demand (COD) was fed for a consistent hydraulic residence time (HRT) of 7 d and a flux rate of 100 L/m2/d. PMF and LCF-AMBRs efficiently treated wastewater achieving over 94% removal at high and over 95% removal efficiency at low COD loadings. At low COD loading, PMF-AMBR removed 54.1% and LCF-AMBR 57.2% total nitrogen (TN), while the removal efficiencies decreased to 45.6% and 47.0% at high loading conditions. However, PMF-AMBRs showed 29-33% and LCF-AMBRs around 21-24% total phosphorus (TP) removal, regardless of the COD loading conditions. The estimated membrane fouling frequency was 0.36/week for LCF-AMBRs and 0.24/week for PMF-AMBRs at low COD loading, while these values increased to 0.61/week for LCF-AMBRs and 0.73/week for PMF-AMBRs at high COD loading. The study showed almost similar performance of LCF and PMF-AMBRs in the biomass production rate of 40 mg/L/d at low COD loading. The calculated net energy return (NER) values for both filtration methods were close to 0.87, indicating them as energy-efficient processes for biomass production. Considering the cost-effectiveness and comparable performance, LCF-AMBR could be a viable alternative to PMF-AMBR for wastewater treatment, particularly under low COD loading conditions.
