Effect of Hydrothermal Treatment on Macro/Micro Nutrients Extraction from Chicken Manure for Liquid Organic Fertilizer Production
J. A. Chamila Bhadraji Perera, Bakhtiyor Nakhshiniev, Hazel Bantolino Gonzales, Kunio Yoshikawa
International Journal of Environment and Climate Change · pp. 64–75 · Published 21 Apr 2015
10.9734/BJECC/2015/15434Abstract
In order to study the influence of the hydrothermal treatment technology (HTT) on macro/micro nutrients extraction from two types of chicken manure (broiler chicken manure (BCM) and laying hen chicken manure (LCM)), hydrothermal treatment followed by the solid/liquid separation of the HTT product was performed with a fixed feedstock to water mass ratio (1:3), 30 min reaction time and three different reaction temperatures (160ºC, 180ºC, 200ºC). More than 50% of N can be extracted from solid to liquid after HTT for both BCM and LCM. Moreover, the organic N content was more than 80% in all liquid samples and it was increasing with the increase of HTT temperature. According to all the results, 180ºC is the optimum temperature for both types of chicken manure and the pH value of the liquid extracted at the optimum temperature was close to 7 for both types of chicken manure. The heavy metal contents in the liquid obtained from BCM and LCM were not detected. It was observed that macro nutrients and micro-nutrients were dissolved in the liquid after HTT.
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