Reduction of Particulate Matter and Ammonia by Spraying Acidic Electrolyzed Water onto Litter of Aviary Hen Houses : A Lab-scale Study

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with host publication)peer-review

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Author(s)

  • Lilong Chai
  • Yang Zhao
  • Hongwei Xin
  • Tong Wang
  • Atilgan Atilgan
  • Michelle Soupir

Detail(s)

Original languageEnglish
Title of host publication2016 ASABE Annual International Meeting
Place of PublicationSt. Joseph, Michigan
PublisherAmerican Society of Agricultural and Biological Engineers
ISBN (Print)9781510828759
Publication statusPublished - 2016
Externally publishedYes

Publication series

NameASABE Annual International Meeting
PublisherAmerican Society of Agricultural and Biological Engineers

Conference

Title2016 ASABE Annual International Meeting
PlaceUnited States
CityOrlando
Period17 - 20 July 2016

Abstract

Particulate matter (PM) concentrations are high in aviary hen houses due to accumulation of litter on the floor and hen activities on it. Spraying agent such as acidic electrolyzed water (AEW) to mitigate PM levels and disinfect houses has been reported, and higher spray dosage will reduce PM to a lower level. However, spraying higher dosage of AEW may generate higher levels of ammonia (NH3) due to increase in litter moisture content (LMC). Lab-scale experiments were conducted to assess the effect of AEW spray dosage and pH value on PM and NH3 emissions from litter of aviary hen houses. Three spray dosages of 25, 50, and 75 mL [kg dry litter]-1d-1 and three pH values of 3, 5, and 7 at a free-chlorine concentration of 200 mg L-1 were tested. Spraying was done within 10 min once a day for 5 consecutive days. A no-spray regimen was used as the control. Four dynamic emission chambers (DEC's) located in an environmentally-controlled room were used for the evaluation. The results showed that higher spray dosages of AEW led to lower PM emissions. Specially, spraying dosages of 25, 50, and 75 mL [kg dry litter]-1d-1 reduced PM levels by (mean±SD) 71±3%, 81±1%, and 89±1%, respectively, immediately after spraying. The PM reductions were still significant after 24h of spraying, averaging 57±4%, 71±5%, and 83±1%, respectively. There was no significant difference (P=0.30-0.43) in reduction efficacy among the PM sizes (i.e., PM1, PM2.5, PM4, PM10, and total suspended particulates). For NH3 emissions, spraying 75 mL [kg dry litter]-1d-1 generated 5-6 times NH3 emissions as compared to 25 mL [kg dry litter]-1 d-1 due to difference in LMC (22.6% vs. 13.0%). Meanwhile, spraying AEW with pH7 yielded 2-3 times higher NH3 emissions than AEW with pH3 at the same dosage. Ammonia emissions of all the spray treatments were found to be higher than those of the control, albeit no significant difference between control and the 25 mL [kg dry litter]-1d-1 dosage at pH3 and pH5 (P=0.81, P=0.47). Pearson correlation coefficients between NH3 and spray dosage (0.82) and pH value (0.46) indicated that the spray dosage is more linearly correlated to NH3 emissions than pH value (P<0.05). The results suggest that use of 25 mL [kg dry litter]-1d-1 dosage at a pH3 seems to be a prudent combination to control PM levels without causing the undesired elevation in NH3 emissions in the litter-based aviary hen houses. This lab-based finding provides the basis for the future field verification test.

Research Area(s)

  • Air quality, Alternative hen housing, Animal and worker health, Laying hen

Citation Format(s)

Reduction of Particulate Matter and Ammonia by Spraying Acidic Electrolyzed Water onto Litter of Aviary Hen Houses: A Lab-scale Study. / Chai, Lilong; Zhao, Yang; Xin, Hongwei et al.
2016 ASABE Annual International Meeting. St. Joseph, Michigan: American Society of Agricultural and Biological Engineers, 2016. 162455276 (ASABE Annual International Meeting).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with host publication)peer-review