Non-woven fabric filter separation activated sludge reactor for domestic wastewater reclamation

A non-woven fabric filter was experimentally evaluated for solid-liquid separation in an activated sludge reactor as an alternative membrane. A polypropylene fabric filter (70, 50 and 35 g/m2) was used for the experiment. The pilot system was operated in A/O (Anaerobic/Oxic) type in which the filter...

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Bibliographic Details
Published in:Water science and technology 2003, Vol.47 (1), p.133-138
Main Authors: SEO, G. T, MOON, B. H, LEE, T. S, LIM, T. J, KIM, I. S
Format: Article
Language:English
Subjects:
Activated sludge
Activated Sludge Process
Applied sciences
Backwash
Biological and medical sciences
Biological treatment of waters
Biotechnology
Carbon/nitrogen ratio
Conservation of Natural Resources
Domestic wastewater
Effluents
Environment and pollution
Exact sciences and technology
Fabrics
Filtration
Fundamental and applied biological sciences. Psychology
Gravitation
Gravity
Industrial applications and implications. Economical aspects
Influents
Manufactured Materials
Nitrogen removal
Nonwoven fabrics
Other wastewaters
Phosphorus
Phosphorus removal
Pollution
Polypropylene
Polypropylenes
Raw wastewater
Reactors
Reclamation
Removal
Separation
Sludge
Waste Disposal, Fluid - methods
Wastewater
Wastewater renovation
Wastewater treatment
Wastewaters
Water Movements
Water purification
Water Purification - methods
Water reclamation
Water treatment and pollution
Water treatment plants
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Summary:A non-woven fabric filter was experimentally evaluated for solid-liquid separation in an activated sludge reactor as an alternative membrane. A polypropylene fabric filter (70, 50 and 35 g/m2) was used for the experiment. The pilot system was operated in A/O (Anaerobic/Oxic) type in which the filter module was submerged into the oxic compartment. The filtration module consists of 10 plate type rectangular filter elements with effective filtration area, 2 m2. Gravity filtration was carried out for solid-liquid separation by changing the water head 0.05-0.5 m without backwashing during the system operation. Initial permeate flux was set at 0.4 m/d. C/N ratio of raw wastewater was controlled at 4.5 in terms of BOD/T-N. The fabric filter system showed a good performance enough for domestic wastewater treatment. Effluent solid concentration was 3.2 mg/L (93.5% removal). COD removal efficiency was 91.6% producing an effluent concentration around 13 mg/L. 66% of total nitrogen removal could be obtained at the adjusted C/N ratio of influent wastewater. However phosphorus removal was very low at 23%. It was found that the initial flux of 0.4 m/d should be maintained for stable performance of the system.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2003.0035