10.1007/s40093-018-0213-y

Change in nutrient composition of biochar from rice husk and sugarcane bagasse at varying pyrolytic temperatures

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  • Ifeoma Monica Nwajiaku1,
  • John Seye Olanrewaju2,
  • Kuniaki Sato3,
  • Takeo Tokunari4,
  • Shigeru Kitano4,
  • Tsugiyuki Masunaga*3,
  1. Imo State University, Owerri, Nigeria
  2. New Sawah Project, National Centre for Agricultural Mechanization (NCAM), Ilorin, Nigeria
  3. University, Matsue, Japan
  4. Meiwa Kogyo Co. Ltd, Kanazawa, Japan

Received: 2017-12-12

Accepted: 2018-08-11

Published in Issue 2018-08-17

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Monica Nwajiaku, I., Seye Olanrewaju, J., Sato, K., Tokunari, T., Kitano, S., & Masunaga, T. (2018). Change in nutrient composition of biochar from rice husk and sugarcane bagasse at varying pyrolytic temperatures. International Journal of Recycling of Organic Waste in Agriculture, 7(4). https://doi.org/10.1007/s40093-018-0213-y
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Abstract

Purpose Waste management is one of the significant challenges facing Nigeriaâs agricultural sector. To manage this problem, the conversion of agricultural wastes to biochar is a practical solution.
Methods In this work, the chemical composition of biochar from rice husk and sugarcane bagasse, two predominant agricultural wastes, commonly generated in Nigeria was studied. These wastes were pyrolyzed at 300â700 and 350â700 °C for rice husk biochar (RHB) and sugarcane bagasse biochar (SBB), respectively.
Results It was found that biochar yield and total nitrogen decreased with increasing pyrolysis temperature while ash content, pH, EC, total carbon, extractable Ca, Mg, Na, available phosphorus and silica were increased. In RHB, extractable K increased with increasing pyrolysis temperature, while in SBB it decreased with its maximum observed in RHB.
Conclusions Rice husk pyrolyzed at high temperature may produce nutrient-rich biochar with high nutrient contents and these could ameliorate acidic soils. Finally, SBB could give high available silicon with acid pre-treatment.

Keywords

  • Biochar,
  • Nutrient content,
  • Sugarcane bagasse,
  • Pyrolysis temperature,
  • Rice husk
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