Kinetic Analysis for Ammonia Decomposition in Supercritical Water Oxidation of Sewage Sludge

1999 ◽  
Vol 38 (11) ◽  
pp. 4500-4503 ◽  
Author(s):  
Motonobu Goto ◽  
Daisuke Shiramizu ◽  
Akio Kodama ◽  
Tsutomu Hirose
Keyword(s):  
Sewage Sludge ◽  
Kinetic Analysis ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Ammonia Decomposition ◽  
Supercritical Water Oxidation

Phosphate recovery from sewage sludge in combination with supercritical water oxidation

2003 ◽  
Vol 48 (1) ◽  
pp. 185-190 ◽  
Author(s):  
K. Stendahl ◽  
S. Jäfverström
Keyword(s):  
Sewage Sludge ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Organic Contaminants ◽  
Sodium Phosphate ◽  
Pure Water ◽  
Phosphate Solution ◽  
Supercritical Water Oxidation ◽  
Digested Sludge ◽  
Sodium Phosphate Solution

Supercritical Water Oxidation (SCWO) is an innovative and effective destruction method for organics in sewage sludge. The SCWO process leaves a slurry of inorganic ash in a pure water phase free from organic contaminants, which opens possibilities for a simple process to recover components like phosphates from the sewage sludge. In a continuous pilot plant for the SCWO process digested sludge has been treated. The ash has been extracted in lab scale with both caustic and acids in order to recover phosphates. By leaching the ash with caustic, 90% of the phosphorus could be separated as a sodium phosphate solution. By treating the sodium phosphate solution with lime, calcium phosphate was precipitated and caustic recovered and circulated back to the leaching process.

Design of the first pilot scale plant of China for supercritical water oxidation of sewage sludge

2012 ◽  
Vol 90 (2) ◽  
pp. 288-297 ◽  
Author(s):  
Donghai Xu ◽  
Shuzhong Wang ◽  
Xingying Tang ◽  
Yanmeng Gong ◽  
Yang Guo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Pilot Scale ◽  
Supercritical Water Oxidation

Application of red mud as both neutralizer and catalyst in supercritical water oxidation (SCWO) disposal of sewage sludge

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54202-54214 ◽  
Author(s):  
Hongzhen Chen ◽  
Guangwei Wang ◽  
Yuanjian Xu ◽  
Zhong Chen ◽  
Fengjun Yin
Keyword(s):  
Sewage Sludge ◽  
Supercritical Water ◽  
Red Mud ◽  
Water Oxidation ◽  
Supercritical Water Oxidation

Red mud was used in the supercritical water oxidation (SCWO) disposal of sewage sludge, not only as a neutralizer for acidic substances produced in situ, but also as a catalyst for decomposition of pollutants.

Green process for supercritical water oxidation of sewage sludge with red mud as CO2 absorbent

2016 ◽  
Vol 4 (3) ◽  
pp. 3065-3074 ◽  
Author(s):  
Hongzhen Chen ◽  
Guangwei Wang ◽  
Yuanjian Xu ◽  
Zhong Chen ◽  
Fengjun Yin
Keyword(s):  
Sewage Sludge ◽  
Supercritical Water ◽  
Red Mud ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Green Process ◽  
Co2 Absorbent
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