Subdual of stationary thresher machine for chopping resudies

(as cited from Awady et al., 2001). El-Raie et al. (1998)

 

investigated the characteristics of fuel values of some agricultural 

residues such as barley straw, fababean green coating, dry corn leaves, 

rice straw, corn cobs, cotton stalks, corn stalks, and wheat straw 

converted into energy as alternative non traditional energy source.

  

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 Misr J. Ag. Eng., July  2007 

  

                            

                                                        

 

 

506 

Nasr

 (2000) 

reported that the productivity of the chopper is proportional 

with drum speed, moisture content and feeding speed. 

Tarek et al. (2001) developed a rice straw chopper. Their results 

showed that the productivity of the developed machine was 0.95 ton/h at 

2000 rpm rotor speed and cut lengths of (1-9 cm) reached 95.23 % from 

the total amount of cut residue. El-Berry et al. (2001) mentioned that 

the quantity of crop residues in Egypt reached about 25 million-ton per 

year and national income is expected to increase with 1.6 billion 

L.E/year if residues are recycled. They evaluated Hematol chopper and 

compared it with Balady thresher in rice straw. El-Iraqi and El-

Khawaga (2003) designed and evaluated a machine for cutting crop 

residues. The maximum percentage in cut length of less than 5 cm of 

87.80 % and 92 % were obtained for rice straw and corn stalks residues 

respectively. Meanwhile, the energy requirement was found to be 6.36 

and 6.17 kW.h/ton for rice straw and corn stalks residues respectively. 

The maximum operating cost was 5.10 L.E/h or 6.61 L.E/ton for cut rice 

straw residues. Helmy et al. (2003) mentioned that the quantity of 

different residues in Egypt equal 103.56 ton/year (agricultural, animal, 

sewage and rubbish residues). The agricultural residues were about 

31.42 ton/year which may represent 30-50% of total agricultural 

production. The animal residues were about 55.37 ton/year. Meanwhile 

sewage residues were 3.99 ton/year and rubbish was 12.78 ton/year. EL-

Ashry(2003). Concluded that, the feasibility of using a local stationary 

thresher for chopping and grinding farm crop residues(rice straw and 

maize stalks) with suitable particles size for pelleting process. Ebaid 

(2006)  used corn Sheller for chopping cotton and corn stalks and 

mentioned that: Farmers can use the corn shellers in chopping crop 

residues. 

The optimum performance was at feed rate of 750 kg/h (0.750 ton/h) and 

500 kg/h (0.50 ton/h) for corn and cotton stalks residues respectively, and 

chopping drum speed of 33.5 m/sec (1600 rpm). Cutting length category 

percentage at these conditions was 63 and 45.40 % in cutting length of 

<3.35 for corn and cotton stalk residues respectively.  It was found that 

the chop operation cost was 13.33 LE/ton and 20 LE/ton for cutting corn 

and cotton stalk residues respectively. 

 

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 Misr J. Ag. Eng., July  2007 

  

                            

                                                        

 

 

507