The utilisation by growing pigs of ruminant offal hydrolysed in formic acid

The utilization of acid-preserved poultry offal by growing-finishing pigs

“…The preservation of waste fish and fish products by acid hydrolysis for use as a feed has been practiced for some time (Winter and Feltham 1983). It has been demonstrated that it is also possible to hydrolyze and preserve offal from animal slaughtering plants using formic or inorganic acids (Francis and Turnbull 1979; Norman et al l9l9; Machin et al 1986). This process avoids the costly drying required in the production of blood and meat meal.…”

“…This process avoids the costly drying required in the production of blood and meat meal. Acid preservation is useful when availability of waste to be processed is limited or seasonal; it does not require sophisticated technology or facilities and is suited to use in regions where these products are available and in developing countries (Norman et al 19'79; Machin et al 1986).…”

“…There is little information on the use of acid-preserved poultry offal for feeding pigs. Machin et al (1986) found that formic-acidpreserved cattle offal was palatable to pigs and could be used to supply a large proportion of their dietary protein and energy requirements. Machin et al (1984) also showed that poultrv offal hydrolysate (POH) preserved with formic acid and dried on wheat middlings and maize could replace frsh meal in poultry diets when energy content was equal.…”