POULTRY AND LIVESTOCK FEED RPOCESSING EQUIPMENT OF CAAMS POULTRY & LIVESTOCK QUIPMENT DEPARTMENT

ETS Series Multi-functional ExtruderSpecificationCharacteristicsThe extruder has the function ofextruding raw material and finishedproduct. With different configuration,

Electrolyzed water and its application in animal houses

Electrolyzed water(EW) can be produced by electrolysis of a dilute salt solution. Slightly acidic electrolyzed water(SAEW, p H 5.0–6.5) and neutral electrolyzed water(NEW, p H 6.5–8.5) are considered healthy and environmentally friendly because no hazardous chemicals are added in its production, there is reduced corrosion of surfaces and it minimizes the potential for damage to animal and human health. Over the last decade, EW has become increasingly popular as an alternative disinfectant for decontamination in animal houses. However, there have been some issues related to EW that are not well known, including different mechanisms for generation of SAEW and NEW, and the antimicrobial mechanism of EW. This review covers the definitions of SAEW and NEW, different generation systems for SAEW and NEW, the antimicrobial mechanism of EW, and recent developments related to the application of SAEW and NEW in animal houses.

Optimization of slightly acidic electrolyzed water spray for airborne culturable bacteria reduction in animal housing

Slightly acidic electrolyzed water(SAEW)spray has been considered as a novel approach for airborne bacteria reduction in animal housing.This study aimed to optimize the operating parameters of SAEW spray based on the size distribution of sprayed aerosols,the available chlorine travelling loss in sprayed aerosols,and the reduction efficiency of airborne culturable bacteria(CB).The optimized operating parameters were the nozzle orifice diameter and the spray pressure.The size distribution characteristics of sprayed SAEW aerosols under different operating parameters were quantified.The pH and available chlorine concentrations of the original SAEW solution and the SAEW aerosols collected at 0 m,0.25 m,0.50 m,0.75 m,and 1.00 m from the spray nozzle head were analyzed.A bioaerosol nebulizing generator was used to simulate animal housing environment in an environmentally-controlled chamber.Six SAEW spray trials under different operating parameters were conducted at a spray dosage of 80 mL/m2 in the chamber.Airborne CB concentrations before and after spray were measured to investigate the reduction efficiency of airborne CB.Dv(50),the volume-based diameter below which 50%of the particle being present,increased with the nozzle orifice diameter and decreased with the spray pressure.The travelling loss of available chlorine in the sprayed SAEW aerosols was greatly dependent on Dv(50).SAEW spray with medium size sprayed aerosols(Dv(50)=86.62μm,67.94μm,and 54.53μm)showed significantly higher airborne CB reduction efficiencies than large(Dv(50)=121.80μm and 96.00μm)or small size aerosols(Dv(50)=42.57μm).The spray operating parameters that provide medium size sprayed aerosols(Dv(50)~60-90μm)are recommended for SAEW spray in animal housing.