In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 295-297 ( 2011-7), p. 323-329
Abstract:
Four up-flow anaerobic sludge blanket reactors (UASB) filled with oyster shell (R 1 ), activated carbon (R 2 ), quartz sand (R 3 ), zeolite (R 4 ), respectively had been selected to inspect their effects on the COD removal efficiency, and to compare with the traditional UASB reactor (R 0 ). System stability and pH variation were also inspected. All the reactors were inoculated with sludge from a local sewage treatment plant, and fed with the synthetic wastewater. The organic load rate was 0.96 kgCOD . m -3 . d -1 during 1-20 days (StageⅠ), 1.86 kgCOD . m -3 . d -1 during 21-57 days(StageⅡ), and 5.32 kgCOD . m -3 . d -1 during 58-97 days(StageⅢ), the system temperature was controlled at 35 °C. The influent pH was 7-8. The results reveal that: (1) The average removal rate was 94.5%, 78.0%, 91.4% for R 1 ; 93.6%, 87.7%, 92.5% for R 2 in the three stages, respectively. R 1 and R 2 reactors are suitable to treat low organic load wastewater( 0.96 kgCOD.m -3 . d -1 ) to high organic load wastewater(5.32 kgCOD.m -3 . d -1 ). R 3 , R 4 and R 0 are not suitable for high organic load wastewater. (2) R 1 and R 2 reactors can resist the continuous organic shock load, and the system can recover in a short time; R 3 , R 4 and R 0 reactors could not recover during StageⅢ. (3) The system was sensitive to temperature variation, so temperature was an important factor to the system. (4) Anaerobic granular sludge were formed in R 1 , R 2 , R 3 , R 4 reactors, the amount of granular sludge sequencing was 89.02%, 82.46%, 16.44%, 36.54%, respectively. Compared to the support material size which was 0.15-0.20 mm; the size of granular sludge larger than 0.90mm was 41.5% in R 1 reactor, and 28.8% in R 2 reactor. (5) All the reactors had the ability of pH value moderation, so the pH value of all the system were stable. Since oyster shell is a solid waste, oyster shell powder used as the immobilization material not only has good effects of immobilization, but also has a strong economic competitiveness.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.295-297
DOI:
10.4028/www.scientific.net/AMR.295-297.323
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2011
detail.hit.zdb_id:
2265002-7
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