Design and evaluation of a grain respiration measurement system for dry matter loss of soybeans

Sood, Kaneeka

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https://hdl.handle.net/2142/89038 Copy

Description

Title

Design and evaluation of a grain respiration measurement system for dry matter loss of soybeans

Author(s)

Sood, Kaneeka

Issue Date

2015-12-03

Director of Research (if dissertation) or Advisor (if thesis)

Danao, Mary-Grace C.

Committee Member(s)

• Gates, Richard S
• Rausch, Kent D

Department of Study

Engineering Administration

Discipline

Agricultural & Biological Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• postharvest loss
• dry matter loss
• grain respiration

Abstract

A respiration measurement system was designed, fabricated and tested to estimate dry matter loss (DML) of soybeans through monitoring carbon dioxide (CO2) from grain respiration by gravimetric analysis. The system consisted of three parts: conditioned air input, grain respiration column, and moisture and carbon dioxide absorption columns. The system was tested for maximum loading rates (r_(CO_2)^*), minimum residence times (RT), capacities (A_(H_2 O), A_(CO_2 )) and efficiencies (η_(H_2 O), η_(CO_2 )) of moisture and CO2 absorption columns. A pair of preliminary tests with 14% moisture soybeans at 35°C was conducted to demonstrate how to estimate respiration rate (r_(CO_2 )) and DML rate (rDML). Results showed that moisture absorption columns had A_(H_2 O) = 21 g, no minimum RT and overall η_(H_2 O) = 0.96 ± 0.07 when flow rate, Q = 200 to 2000 ml/min. Similarly, the CO2 absorption columns had A_(CO_2 )= 12.6 g with r_(CO_2)^*= 2.1 g/h, minimum RT of 5.4 s and overall η_(CO_2 )= 0.99 ± 0.01 when 〖MC〗_ad ≥ 11.27%. Results from a soybean respiration test showed a r_(CO_2 )= 15.7 mg/(kg·h) and rDML = 0.010%/d, which were comparable to rates reported by Rukunudin et al. (2004). Compositional analysis showed changes in soluble protein, FFA and mold counts may be significant even after 4-5 d of storing 14% moisture soybeans. These results showed the system may be used to evaluate a wide range of respiration and DML rates for various oilseeds, cereal grains, and other agricultural or food products.

Graduation Semester

2015-12

Type of Resource

text

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http://hdl.handle.net/2142/89038

Copyright and License Information

Copyright 2015 Kaneeka Sood

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