|
KMID : 0382420010270020017
|
|
Korean Journal of Environmental Health Society
2001 Volume.27 No. 2 p.17 ~ p.21
|
|
|
The Study on the Dewaterability Improvement of Water Treatment Sludge Using Powdered Waste Oyster Shells
|
|
Moon Jong-Ik
Choi Sung-Moon
Lim Young-Seok
Sung Nak-Chang
Kim Chul
Kwak Young-Kyu
|
|
|
Abstract
|
|
|
The object of this study is to find out the characteristics of waste oyster shells and determine the proper dosage of powdered waste oyster shells as the conditioning agent for water treatment sludge dewatering process. The large amount of waste oyster shells which discharges from the oyster farming, occurs serious environmental hazards. However, oysters shell contain large amount(about 38% by weight) of alkaline minerals, such as calcium and magnesium and so on, this natural material is thought to have the potential ability as a good conditioning agent. The results of this study are as follows.
The optimum condition for improvement of the water treatment sludge dewaterability is when 6 g of waste oyster shell powder added to 200 ml of water treatment sludge. At optimum condition, the solid contents can reach to 31.78% and the specific resistance of conditioned sludge is 0.16 x 10 exp(8) sec^2/g. However, exceeding the optimum oyster shell dosage, the specific resistance do not decreased. Therefore, the addition of optimum amount of powdered waste oyster shell is needed to get the effective result.
Consequently, the waste oyster shell can be a recyclable material to improve the dewaterability of water treatment sludges.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|