Initial Operation of Purification of Municipal Wastewater by Oyster Shell Contacted Beds
Date Issued
2009
Date
2009
Author(s)
Kuo, Cheng-Shiang
Abstract
The purpose of this study is to utilize wasted oyster shells from Dong-shih, Chia-yi County as the contacted bed media to purify domestic wastewater on Er Chong drain flooded fields, Taipei County, and to provide the availability of using wasted oyster shells and water purification efficiency. In the results of the head control of overland flow with oyster shells systems, the average of mass removal of BOD5, SS, NH4+-N, NO3--N, NH4+-N+ NO3--N, TP, PO4-P were 13.80, 51.75, 7.20, 0.96, 4.53, 0.53, 0.33 g/day.m2. The BOD5 first-order reaction reducing rate constant in 20℃was 2.40 day-1. Consequently, using oyster shells showed the potential for wastewater purification by contacted bed. The gated distribution pipe of overland flow with oyster shells systems performed efficiently under much more wastewater hydraulic loading rate. Re-aerated treatment was able to increase and stabilize the pollution purification. Through operation processes, the head control of overland flow systems performed efficiency purification until the hydraulic retention time ratio between 0.7~0.8. The gated distribution of overland flow systems performed efficiency purification until the hydraulic retention time ratio higher than 1.36. The treatment systems should be managed the influent and water level to construct uniform flow under the optimal hydraulic retention time.
Subjects
constructed wetland
contacted bed
oyster shell
biofilm
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96622048-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):34522b7cd4701076886b1abfb828a5ae