Application of Wet Air Oxidation to Disposal of Animal By-Products
This paper describes the application of sub-critical Wet Oxidation to the disposal of sheep animal by-products originating from slaughterhouse. Animal by-products (ABPs) from categories 1 and 3 were oxidized individually (gall, head, tail, spinal cord, offal, ileum and blood) and in a representative mixture. The oxidation advancement was performed by TOC analysis and the results showed that the TOC removal range was comprise between 60％-96％ depending on the operational conditions (impeller speed, temperature, initial TOC concentration and initial moment of air injection). The temperature was the most influent parameter and the higher TOC removal yields were obtained at the highest temperature (300°C). The kinetics of a representative sample were studied between 200°C-300°C and the apparent activation energy was found to be 42,86 kJ/mol. The chemical by-products and refractory compounds were also identified and quantified in the final oxidized solution: acetic acid and ammonia were the identified as the major by-products after the oxidation of all the ABPs samples and represented 52％ and 74.7％ respectively after the oxidation of a representative sample containing 5g/L of TOC. These results confirmed that the sub-critical wet oxidation process can be applied directly at the slaughterhouse level to dispose of animal by-products.
wet oxidation sub-critical water animal by-products thermal treatment chemical composition
Sofiane ZALOUK Maurice AMBROSIO Stéphane BARBATI
Laboratoire de Chimie et Environnement, Université de Provence – 3, Place Victor Hugo (case 29) - 13331 Marseille, France
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）