phd.nawfal

The use of enzymes in animal feed was first reported in 1925 (Hervey 1925) but the chemistry of target feed substrate has been understood during the last two decades only. The field of biotechnology has introduced various advancements in enzyme production technology specifically in fermentation and microbiological processes resulting in production of enzymes in affordable range to be used for comm ...

Does high humidity affect the performance of exhaust fans? Yes, but probably not as much as you think and not in the way you may believe. Most people believe that humid air is heavier than dry air. After all, humid air has more moisture in it and therefore should weigh more than air that contains less moisture. But, in actuality, humid air weighs less than dry air. This is because moist air contai ...

Figure 1 illustrates the amount of water which will evaporate from properly wetted, 15 cm paper evaporative cooling pad system, as a function of outside temperature and relative humidity. The amount of water evaporated is provided in terms of gallons per minute per 100,000 cmh of operating tunnel fan capacity. For example, if a house had 100,000 cmh of tunnel fan capacity and the outside temperatu ...

Feed accounts for more than 70% of total production cost in Poultry and optimization of performance using least feed cost is one of the pre requisites to ensure profitable Poultry production. With changes in the raw material availability, price, quality and so on, there is a huge demand to finding alternate forms of ingredients which optimise the performance and at the same time do not allow the f ...

Unlike many aspects of operating a tunnel-ventilated house during hot weather, the performance of an evaporative cooling pad system is relatively predictable. This is because there are well defined relationships between the cooling produced by a pad system and water usage, pad area, outside temperature/humidity, and water temperature. Since most evaporative cooling pads are essentially identical a ...

The brooding area of most broiler houses requires a heating system capable of providing between 40 and 60 Btu's/hr to maintain an air temperature in the low 90's during cold weather. For instance, a 54' X 250' brooding area would typically require a heating system capable of producing between 675,000 BTU/hr (54' X 250' X 40 BTU/hr = 540,000 BTU/hr) and 810,000 BTU/hr (54 ...

1. IntroductionThe poultry industry in the United States is one of the largest food industries worldwide, and chickens are commonly reared for meat production [1]. Annually, this industry generates over 10 million tons of litter to accommodate the growing number of birds necessary to meet consumer demands [2]. The poultry industry is faced with numerous challenges, the focal point being the issue ...