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- Title
Effect of horizontal-flow velocity on permeate flux and nutrient removal of the novel inclined-tube/oxidation-ditch membrane bioreactor for building wastewater recycling.
- Authors
Ratanatamskul, Chavalit; Romskul, Tiennalin
- Abstract
A hybrid system of the inclined-tube/oxidation ditch-membrane bioreactor or IT/OD-MBR system was developed. While keeping hydraulic retention time (HRT) of 24 h, the system was operated with different horizontal flow velocities of 0.2,0.3 and 0.4 m/s. The performance and stability of the IT/OD-MBR system for biological nutrient removal and permeate flux was investigated. The results indicated that IT/OD-MBR system could achieve high performances for COD, ammonia and phosphorus removal efficiencies over 90%, 90% and 80%, respectively with the horizontal flow velocity at least 0.2 m/s. Moreover, the predominant foulant of microbial EPS was found to be lipid. For long-term system operation, the optimal horizontal flow velocity at least 0.3 m/s is recommended for the stable permeate flux and nutrient removal performance. High quality of treated effluent from the proposed hybrid IT/OD-MBR system could comply with the water reuse guideline for landscape and gardening purposes. [Display omitted] • The novel IT/OD-MBR could perform as a hybrid single reactor for building wastewater recycling. • Stable removal efficiencies over 90% for COD and nutrients could be achieved with IT/OD-MBR. • Optimal horizontal flow velocity at least 0.3 m/s is recommended for stable system operation. • The treated effluent quality could comply with reused water quality standard for building use. • The recycled water costs are cheaper than the tap water cost in the EEC area with excessive water use.
- Subjects
BIOLOGICAL nutrient removal; ADVECTION; HYBRID systems; FLOW velocity; EFFLUENT quality; SEWAGE
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2022, Vol 188, p823
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2022.10.033