UTILIZATION OF SHRIMP WASTE 



121 



tration of the acid used should be kept low in order to minimize loss of 

 valuable constituents by conversion of calcium carbonate to calcium 

 sulphate. The acid cooked wet shrimp stock does not attract flies, 

 and this method serves as an excellent process wlien tlie rush of 

 work requires attention elsewhere. 



PRODUCTION COSTS 



Although no accurate data on costs of production can be compiled 

 that will be applicable to all localities and at every plant, a fair 

 estimate of the labor requirements may be given which can be used as 

 a basis for calculating costs. The various procedures or methods of 

 converting shrimp waste into salable and valuable fertilizer, poultry 

 and cattle feedstuff require a few common operations such as collec- 

 tion of the waste, while in others, cooking and acid treatment con- 

 stitute additional operations. The labor requirements for these op- 

 erations are the same. An attempt is made in Tables 6 and T to 

 present data that will be of service in calculating costs under local 

 conditions. These data are given on the basis of treating 1 ton 

 of shrimp waste, either heads or heads and shells, plus any under- 

 sized shrimp. 



Table 6.- — Data for calculating labor costs hi utilization of shrimp icastes 

 [On basis of 1 ton of raw shrimp waste] 



Table 7. — Items for consideration in calculating costs for processing shrimp 



wastes 



[On basis of 1 ton of thw shrimp] 



Items 



Chamber acid (pounds) 



Salt (pounds) 



Steam 



Equipment: 



(o) Collection baskets 



(6) Acid mixers 



(c) Cooking baskets and vats 



(d) Solar drying 



(e) II eat drying 



(/) Grinders 



Storage space 



Power for grinders 



Fuel for drying 



Yields (pounds) 



Acid water- Noncook 

 cook acidulation 

 method I method 



Cook ac- 

 idulation 

 method 



240. 



None. 



Yes. 



Y'es. 

 Yes. 

 Yes. 

 Yes. 



No. 

 No. 

 Yes. 

 No. 

 No. 

 760. 



