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Volume 38 Issue 2
Feb.  2020
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2020  >  38(2): 128-134
XIANG Hong-lin, JIANG Jian-guo, GAO Yu-chen, MENG Yuan, XU Yi-wen, AIKELAIMU Aihemaiti, JU Tong-yao, HAN Si-yu, GUO Yan-ran. EFFECT OF AIR-FLOW RATE ON BIO-DRYING OF ORGANIC WASTE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(2): 128-134. doi: 10.13205/j.hjgc.202002017
Citation: XIANG Hong-lin, JIANG Jian-guo, GAO Yu-chen, MENG Yuan, XU Yi-wen, AIKELAIMU Aihemaiti, JU Tong-yao, HAN Si-yu, GUO Yan-ran. EFFECT OF AIR-FLOW RATE ON BIO-DRYING OF ORGANIC WASTE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(2): 128-134. doi: 10.13205/j.hjgc.202002017
shu

EFFECT OF AIR-FLOW RATE ON BIO-DRYING OF ORGANIC WASTE

doi: 10.13205/j.hjgc.202002017

  • School of Environment, Tsinghua University, Beijing 100084, China

  • Received Date: 2019-07-15
    Abstract
  • The effect of air-flow rate on bio-drying was studied in the bio-drying experiments on typical organic waste. The experiment set three gradients of air-flow rate using typical organic wastes, such as fruits and vegetables, kitchen waste and garden waste as the raw materials. The comparison of temperature, moisture contents (MC) and volatile solid (VS) showed that the air-flow rate would significantly affect the bio-drying index air efficiencies and lower heating value (LHV). On the condition of lower air-flow rate, the reactor temperature rose rapidly and the air efficiency would be higher, but had poor ability to carry water vapor, which was difficult to effectively remove the moisture content; under the condition of higher air-flow rate, it was hard for the reactor to maintain higher temperature with more heat loss, but got the lowest final moisture content. At an air-flow rate of 48 L/(kg·h), the final moisture content could be reduced to 13.97%,and the bio-drying index was 2.34. The final LHV was found as high as 13932 kJ/kg, increased by 322% compared with initial one, which met the requirement of refuse derived fuel(RDF) production and improved the bio-drying effect at a lower energy consumption.
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