The treatment of sewage sludge has some problems. First, most of direct landfill of sewage sludge was forbad in domestic land. Second, ocean dumping of sewage sludge of every country is regulating firmly by international pacts such as london convention and Kyoto-Protocol.
So, pyrolysis process ...
The treatment of sewage sludge has some problems. First, most of direct landfill of sewage sludge was forbad in domestic land. Second, ocean dumping of sewage sludge of every country is regulating firmly by international pacts such as london convention and Kyoto-Protocol.
So, pyrolysis process that has not a thermal problems and discharges less pollutant is used as a fit treatment technology for continuously increasing sewage sludge. and then char, by-product, is made into activated reagents or into absorbents that is impregnated with reagents that can adsorb hydrogen sulfide gas by the chemical reaction. After discovering adsorbed amount on variation of partial pressure of hydrogen sulfide when the using the prepared absorbents, we examined adsorption characteristics of absorbents on the basis of the results. Moreover, we examined by the change of the factors such as adsorption temperature, gas concentration and aspect ratio to discover the adsorption capacity of absorbents on hydrogen sulfide and studied the effect of each factor on adsorption capacity. And we would like to present the possibility of preparation of sewage sludge for an absorbent and using the absorbents to remove hydrogen sulfide by the comparison of that results and commercial activated carbons.
After looked over physical characteristics of prepared absorbent PC1 and SC1 that PC1 was impregnated with Na2CO3 in this study, we could find out that the specific surface area of adsorbents didn't change greatly. But, average pore size grew less because of the stopping up pore that has diameter above the nm of 3 when P1 was impregnated with Na2CO3. Nevertheless, we could find out that formation of the mesopore was active considering that the average pore size of PC1 and SC1 are 2.781 nm and 3.263 nm each.
At the results of regression analysis by the application of that result which was got from adsorption equilibrium experiment to Langmuir and Freundlich Adsorption Isortherm, the maximum adsorbed amount, reaction velocity, adsorption capacity of adsorbent and adsorption strength increased by increasing temperature. Adsorption capacity increased in high temperature because chemical adsorption was superior to physical adsorption in the reaction in surface of the prepared absorbent.
We examined breakthrough time and adsorbed amount with the variations of temperature, concentration of hydrogen sulfide and L/D by using SC1 absorbent. At the result, The breakthrough time and adsorbed amounts were increased.
Also, the adsorbed amount per absorbent g was almost same with increasing concentration of hydrogen sulfide because of the limitation of adsorption capacity, but breakthrough time became short gradually.
Breakthrough time became long greatly after packed volume of absorbent was increased twice and third, but adsorbed amount per absorbent g was almost same.
Also, at the results of comparison between the capacities of SC1 absorbent and commercial activated carbon, breakthrough time of SC1 absorbent was 0.6 times that of commercial activated carbon, and adsorbed amount of SC1 was 36.41% that of commercial activated carbon
The prepared absorbents in this study were made from sewage sludge that dump into the ocean, that could be used as absorbent and remove about 100 ppm hydrogen sulfide.
This study could be used as the base data when some study about improvement of absorbent capacity and adsorbed capacity of mixed odor gas generated complicatedly.
The treatment of sewage sludge has some problems. First, most of direct landfill of sewage sludge was forbad in domestic land. Second, ocean dumping of sewage sludge of every country is regulating firmly by international pacts such as london convention and Kyoto-Protocol.
So, pyrolysis process that has not a thermal problems and discharges less pollutant is used as a fit treatment technology for continuously increasing sewage sludge. and then char, by-product, is made into activated reagents or into absorbents that is impregnated with reagents that can adsorb hydrogen sulfide gas by the chemical reaction. After discovering adsorbed amount on variation of partial pressure of hydrogen sulfide when the using the prepared absorbents, we examined adsorption characteristics of absorbents on the basis of the results. Moreover, we examined by the change of the factors such as adsorption temperature, gas concentration and aspect ratio to discover the adsorption capacity of absorbents on hydrogen sulfide and studied the effect of each factor on adsorption capacity. And we would like to present the possibility of preparation of sewage sludge for an absorbent and using the absorbents to remove hydrogen sulfide by the comparison of that results and commercial activated carbons.
After looked over physical characteristics of prepared absorbent PC1 and SC1 that PC1 was impregnated with Na2CO3 in this study, we could find out that the specific surface area of adsorbents didn't change greatly. But, average pore size grew less because of the stopping up pore that has diameter above the nm of 3 when P1 was impregnated with Na2CO3. Nevertheless, we could find out that formation of the mesopore was active considering that the average pore size of PC1 and SC1 are 2.781 nm and 3.263 nm each.
At the results of regression analysis by the application of that result which was got from adsorption equilibrium experiment to Langmuir and Freundlich Adsorption Isortherm, the maximum adsorbed amount, reaction velocity, adsorption capacity of adsorbent and adsorption strength increased by increasing temperature. Adsorption capacity increased in high temperature because chemical adsorption was superior to physical adsorption in the reaction in surface of the prepared absorbent.
We examined breakthrough time and adsorbed amount with the variations of temperature, concentration of hydrogen sulfide and L/D by using SC1 absorbent. At the result, The breakthrough time and adsorbed amounts were increased.
Also, the adsorbed amount per absorbent g was almost same with increasing concentration of hydrogen sulfide because of the limitation of adsorption capacity, but breakthrough time became short gradually.
Breakthrough time became long greatly after packed volume of absorbent was increased twice and third, but adsorbed amount per absorbent g was almost same.
Also, at the results of comparison between the capacities of SC1 absorbent and commercial activated carbon, breakthrough time of SC1 absorbent was 0.6 times that of commercial activated carbon, and adsorbed amount of SC1 was 36.41% that of commercial activated carbon
The prepared absorbents in this study were made from sewage sludge that dump into the ocean, that could be used as absorbent and remove about 100 ppm hydrogen sulfide.
This study could be used as the base data when some study about improvement of absorbent capacity and adsorbed capacity of mixed odor gas generated complicatedly.
Keyword
#하수슬러지 흡착제 H2S
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