We proposed pyrolysis as a promising optional technology for recycling-waste products, especially sewage sludge and animal-waste (manure). In this study, nutrient (nitrogen, phosphorous and potassium) leaching characteristics of carbon products mainly from sewage sludge and cattle waste were analyzed. Results are summarized as follows: 1) Electrical conductivity (EC) of carbon product solutes increase with time, and phosphate and sulfuric ions dissolve gradually from the carbon products of both sewage sludge and cattle waste; 2) Nitrogen decreases with manufacturing temperature and nutrient concentration of phosphorous and potassium are larger; Both phosphorous and potassium are citric soluble and easily available for crop production; and 3) The ratio of nitrogen to phosphorous and potassium can be controlled through the manufacturing temperature. These results provide valuable information for utilizing carbon products from waste products.
|Number of pages||10|
|Publication status||Published - Dec 1 2004|
|Event||ASAE Annual International Meeting 2004 - Ottawa, ON, Canada|
Duration: Aug 1 2004 → Aug 4 2004
|Other||ASAE Annual International Meeting 2004|
|Period||8/1/04 → 8/4/04|
All Science Journal Classification (ASJC) codes