Biochar from pyrolyzed Tibetan Yak dung as a novel additive in ensiling sweet sorghum: An alternate to the hazardous use of Yak dung as a fuel in the home

JOURNAL OF HAZARDOUS MATERIALS

卷:403

Article

Bai, Yanfu¹  Rafiq, Muhammad Khalid^2,4  Li, Shanshan¹  Degen, A. Allan³  Masek, Ondrej²  Sun, Hongwen⁵  Han, Huawen¹  Wang, Ting¹  Joseph, Stephen⁶  Bachmann, Robert Thomas⁷  Sani, Rajesh K.⁸  Long, Ruijun¹  Shang, Zhanhuan¹ 

[1] Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China

[2] Univ Edinburgh, Sch Geosci, UK Biochar Res Ctr, Crew Bldg,Kings Bldg, Edinburgh EH9 3FF, Midlothian, Scotland

[3] Ben Gurion Univ Negev, Blaustein Inst Desert Res, Wyler Dept Dryland Agr, Desert Anim Adaptat & Husb, IL-8410500 Beer Sheva, Israel

[4] Natl Agr Res Ctr, Rangeland Res Inst, Islamabad 44000, Pakistan

[5] Nankai Univ, Coll Environm Sci & Engn, MOE Key Lab Pollut Proc & Environm Criteria, Tianjin 300350, Peoples R China

[6] Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[7] Univ Kuala Lumpur UniKL, Malaysian Inst Chem & Bioengn Technol MICET, Lot 1988, Alor Gajah 78000, Melaka, Malaysia

[8] South Dakota Sch Mines & Technol, Chem & Biol Engn, 501 E St Joseph St, Rapid City, SD 57701 USA

关键词: Yak dung biochar;    Silage agent;    In vitro fermentation;    Methane emission;   

DOI  :  10.1016/j.jhazmat.2020.123647

来源: Elsevier

【 摘 要 】

Yak dung is used as fuel in Tibetan homes; however, this use is hazardous to health. An alternative use of the dung that would be profitable and offset the loss as a fuel would be very beneficial. Sweet sorghum silage with yak dung biochar as an additive was compared with a control silage with no additives and three silages with different commercial additives, namely Lactobacillus buchneri, Lactobacillus plantarum and Acremonium cellulase. Biochar-treated silage had a significantly greater concentration of water-soluble carbohydrates than the other silages (76 vs 12.4-45.8 g/kg DM) and a greater crude protein content (75.5 vs 61.4 g/kg DM), lactic acid concentration (40.7 vs 27.7 g/kg DM) and gross energy yield (17.8 vs 17.4 MJ/kg) than the control silage. Biochar-treated and control silages did not differ in in vitro digestibility and in total gas (507 vs 511 L/kg DM) and methane production (57.9 vs 57.1 L/kg DM). Biochar inhibited degradation of protein and water-soluble carbohydrates and enhanced lactic acid production, which improved storability of feed. It was concluded that yak dung biochar is an efficient, cost-effective ensiling additive. The profit could offset the loss of dung as fuel and improve the health of Tibetan people.

【 授权许可】

Free