Aqua-Critox

T0473 Lawrence Livermore National Laboratory, Direct Chemical Oxidation T0756 Supercritical Water Oxidation—General T0877 Weatherly, Inc., AQUA CRITOX (R)... 

The treatment cost is also heavily dependent on the capital cost. Chematur has evaluated the treatment-cost for the Aqua Critox process as between 36 /Ton, for fine chemicals wastewater (3.6 MT/h), and 96 /Ton, for industrial sludges (1 MT/h). For de- inking sludge the treatment cost could be as low as 9 /Ton after the income from recovered paper filler is deducted. 

Chematur Engineering AB, Karlskoga, Sweden, has acquired the exclusive worldwide rights to Eco Waste SCWO technologies and the process is demonstrated under the trade name Aqua Critox. 

Aqua Critox A plug-flow SCWO system for destroying organic wastes in water. Developed by Chematur Engineering in Sweden and first installed in Johnson Matthey s Brimsdown, UK, plant... 

Most research work on the use of supercritical water has been conducted batchwise and involved non-analytical determinative applications. Thus, supercritical water oxidation (SCWO) was proposed as an alternative treatment for hazardous waste disposal [191] and also as a commercial tool for decomposing trichloroethylene, dimethyl sulphoxide and isopropyl alcohol on a pilot plant scale [192]. Current commercially available equipment (the aqua Critox" system) is usable with industrial and municipal sludge, mixed (radioactive and organic, liquid and solid) waste and military waste. This commercially available treatment has a number of advantages, namely (a) because it uses an on-site treatment method, it avoids the need to transport hazardous materials (b) it ensures complete destruction of organic wastes and allows reuse of the effluent as process water with results that meet the regulations for drinking water and (c) no licence for effluent or air emissions is needed. 

L. Stenmark, Aqua Critox , the Chematur AB Concept for SCWO, in Supercritical Water Oxidation—Achievements and Challenges in Commercial Applications, A. Nazeri, R. W. Shaw and P. A. Marrone (eds.). Proceedings of Workshop held August 14-15, 2001, in Arlington, Virginia, Strategic Analysis, Inc., 2001. 

The same equipment can be used as in PLE, but for temperatures above 200°C, there is no commercial equipment available and specially designed or home-built insmiments are therefore used. Chematur in Sweden manufactures industrial-scale supercritical water oxidation plants operating at temperatures above 400°C (Aqua Critox ). It is possible that such equipment can be modified to subcritical water extraction processes. Uhde in Germany probably also has industrial-scale solutions for PHWE. 

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