Abstract Poultry industry is expanding rapidly and producing million tons of feather waste annually. Massive production keratinaceous byproducts in the form industrial wastes throughout world necessitates its justified utilization. Chemical treatment keratin proclaimed as an eco-destructive approach by various researchers since it generates secondary pollutants. Keratinase released a variety mi...

Sustainable development in the bio-treatment of large-scale biomass bulks requires high performance enzymes adapted to extreme conditions. An extracellular keratinolytic extract was obtained from the culture broth of a halotolerant strain of Salicola marasensis. Keratin hydrolyzing activity of the concentrated enzyme extract was observed on a 100 mg of pretreated feather waste...

Both stocking rate and housing systems are main factors influencing the occurrence of feather pecking in laying hens raised in conventional cage system. This study examines the effects of different type of cage and stock density on feather pecking behaviour in hens. Total of 216 Hisex Brown hens at 16 weeks of age were randomly selected and put into 2 types of battery cages: conventional cages ...

Biogas technology has been used quite extensively to generate renewable energy from organic wastes while also recycling nutrients in the wastes and reducing harmful emissions. However, the challenges of low biogas yield from recalcitrant and inhibitory solid wastes together with high construction and operation costs of bioreactors have impeded optimal performance through this process. Additiona...

Biodegradation of livestock processing waste is one the more cost-effective, ecologically safe recycling methods thatmay preserve nutritional content and key amino acids useful in animal feed production. Here, we determined thebiodegrading potentials nonconventional feedstuffs using a combination bacteria (Bacillus subtilis) fungi(Fusarium sp.). Five types (feather meal, hair waste, egg membran...

The aim of this study was to find the optimal conditions of a newly isolated Streptomyces strain JRS 19. Screening for keratinase producing bacteria and their keratinase production were investigated. The keratinase produced by the isolate was purified by chromatographic techniques and the optimum pH maintained was 7.0 and maintained at different temperatures Viz., 20ºC, 25ºC, 30ºC, 35ºC and 40º...

Background; Feather waste is generated in large amounts as a by-product of commercial poultry processing. The main component of feather is keratin. The main purpose of this study was to identify Bacillus spp. (the keratinolytic bacteria) that are able to degrade the feather for producing keratin. Methods; Bacillus spp. Were isolated from the waste of poultries located in Miyaneh city. The bact...

A wild type Streptomyces strain BA7 which was isolated from soil, showed a high keratinolytic activity when cultured on native feather medium. Optimum keratinolytic activity was observed at 50 oC and pH 8.5 when using fluid supernatant obtained from aerated culture of this organism. The keratinolytic activity was completely stable (100%) between 30 and 60 oC. The molecular weight of crude enzym...

the aim of this study was to find the optimal conditions of a newly isolated streptomyces strain jrs 19. screening for keratinase producing bacteria and their keratinase production were investigated. the keratinase produced by the isolate was purified by chromatographic techniques and the optimum ph maintained was 7.0 and maintained at different temperatures viz., 20ºc, 25ºc, 30ºc, 35ºc and 40º...