Effects of Tannery Wastes on the Fattening of Growing Cattle, Carcass, and Meat Quality

Abstract

The present study was conducted to determine the effect of tannery waste protein concentrate (TWPC) on fattening of cattle and the carcass and meat quality, with the aim of replacing the costly commercial protein concentrate (Jasoprot) with a more economical and effective alternative. Twelve young cattle (six male and six female) were fed during the study period on a control diet (T1) with 10% Jasoprot and on two test diets: 5% TWPC + 5% Jasoprot (T2) and 10% TWPC (T3). The test diets significantly affected (p<0.05) live weight gain and profitability compared to the control diet, perhaps due to the increased protein and essential amino acid content, relative to Jasoprot. TWPC was free of aflatoxin. Sensory-evaluated organoleptic scores did not differ among the groups. Chemical composition was normal as other beef and was non toxic especially within recommended chromium level (1.90±0.6 µg). Total lipid contents were higher (p<0.05) in T3, and moisture, ash and crude protein contents were almost similar (p>0.05) among the three groups. It is concluded that TWPC or an equal mixture of TWPC and Jasoprot may be an economic and efficient alternative protein source to Jasoprot in the cattle industry, which minimizes adverse effects on carcass and sensory meat quality.

Exploring Tannery Solid Wastes as a Source of Animal Feed

“…Organoleptic scores remained consistent across diets, suggesting no compromise in meat quality. Thus, combined with Jasoprot, tannery waste protein concentrate emerged as a cost-effective substitute in the cattle industry without affecting meat or carcass quality [132,133].…”

“…The predominant concern with chromed tannery wastes lies in the high chromium levels in extracted collagen, potentially endangering humans eating such meat. While studies by Silva et al [130], Jini et al [131], Jahangir-Alam et al [133], and Zhao et al [126] saw no issues with tannery wastes, five other researchers identified chromed wastes as dietary risks for animals. This emphasizes the need for effective dechroming before using tannery residues in animal feeds.…”

Alternative uses for tannery wastes: a review of environmental, sustainability, and science

“…Some authors have studied the influence of vegetabletanned wastes on the diet of broilers [142] and cattle [143]. In both studies three distinct diets were tested: D1 (containing 10% commercial protein concentrate), D2 (containing 5% commercial protein concentrate + 5% tannery waste) and D3 (containing 10% tannery waste).…”

Effect of Graded Levels of Slaughter House Residues on Growth Performance and Haematological Parameters in Broiler Chicken’s Ration

“…The by-products and wastes of slaughterhouse and chickens are perishable, but the processing of waste as alternative protein concentrate as commercial protein concentrate can be of good quality and it could be preserved for a long time and become very useful over time. Protein concentrate from tannery wastes described by [9] is helpful for the preparation of waste protein concentrate but it was not used. Processing of fleshing meal is similar to the preparation of waste protein concentrate as described by [7].…”