Effects of wood shavings addition and different climatic conditions on ammonia and odour emissions from fresh animal manure

• The addition of wood shavings and changing the climatic conditions as methods of mitigating ammonia and odour emissions were investigated using fresh pig and cow manure samples. The manure from each animal type was separated into two portions and wood shavings were mixed with one portion. Emissions from identical quantities of manure with and without wood shavings were measured in a flux chamber. The manure temperature was varied between 15 and 30 ºC. Fresh air at temperatures between 15 and 25 ºC was passed at a fixed rate over the manure in the chamber. Gas and odour concentrations were measured using a photoacoustic multigas analyser 1412 (Lumasense Technologies A/S) and an olfactometer respectively. The addition of wood shavings decreased the total-N and NH4 +-N but increased the ratio between carbon and nitrogen (C/N) as well as the pH. Ammonia emissions increased with manure temperature for both manure types. Odour emissions increased with the cow manure temperature. Odour emissions had a positive tendency with the pig manure temperature for samples without wood shavings. The water vapour pressure was positively correlated to the emissions from the cow manure but not from the pig manure. A clear relationship between ammonia and odour emissions could not be established. The addition of wood shavings lowered the ammonia emissions from the cow manure but not from the pig manure

Ämnesord

LANTBRUKSVETENSKAPER  -- Annan lantbruksvetenskap -- Miljö- och naturvårdsvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Other Agricultural Sciences -- Environmental Sciences related to Agriculture and Land-use (hsv//eng)

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Jordbruksvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Agricultural Science (hsv//eng)

LANTBRUKSVETENSKAPER  -- Husdjursvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Animal and Dairy Sience (hsv//eng)

LANTBRUKSVETENSKAPER  -- Veterinärmedicin (hsv//swe)

AGRICULTURAL SCIENCES  -- Veterinary Science (hsv//eng)

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