By Mohamed Samer
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Additional resources for Abatement Techniques for Reducing Emissions from Livestock Buildings
Amendments can be practical and cost-effective for reducing NH3 and GHG emissions from dairy manure. Amendment products that act as microbial digest, oxidizing agent, masking agent, or adsorbent signiﬁcantly can reduce NH3 by more than 10 %, whereas microbial digest/enzymes with nitrogen substrate appeared effective in reducing CH4 fluxes. For both CH4 and CO2 fluxes, aging the manure slurry for 30 days can signiﬁcantly reduce gas production. Some amendments reduced odor emission depending on the storage period (Wheeler et al.
The performance of bioﬁlter media should be evaluated continuously. The bioﬁlter media characteristics that affect the performance of bioﬁlters include pH, moisture content, oxygen uptake rates, total organic carbon (TOC), and microbial plate counts including total heterotrophs and fungi (Cardenas-Gonzalez et al. 1999). Bioﬁlter function can be impaired if a bioﬁlter has too little oxygen or is overloaded with solids, biochemical oxygen demand (BOD), or ammonia. Increased loading can reduce the capacity of the bioﬁlter to complete the two-step bacterial conversion of ammonia to nitrate, because increasing the loading increase the competition for space oxygen among heterotrophic organisms and nitrobacter, and nitrosomonas.
2007) found complete removal of three phenolic odorants, without recurrence for 72 h, from swine waste via gas chromatograph analysis after the addition of a mixture of hydrogen peroxide and miniced horseradish, while odor intensity was cut into half as determined by a human odor panel. Generally, oxidizing agents are effective in reducing malodors, but only for a short period, due to the large quantities of reagents required for complete oxidation (Wheeler et al. 2011b, c). Natural zeolite, clinoptilolite (an ammonium-selective zeolite), has been shown to enhance adsorption of volatile organic compounds and odor emitted from animal manure due to its high surface area.
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