Impact of microbial waste additives and glucose on ammonia emissions from broiler litter in the lab.

Ammonia (NH) produced inside livestock houses can adversely affect animal welfare and performance and degrade the environment. In broiler houses, NH levels are mitigated by applying acidifiers to the litter but acidifiers provide short-term NH suppression requiring heavy or repeated applications. Microbial additives may provide longer-term NH control through nitrogen (N) immobilization and nitrification.

Major ionic compositions of fine particulate matter in an animal feeding operation facility and its vicinity.

Animal feeding operations (AFOs) produce particulate matter (PM) and gaseous pollutants. Investigation of the chemical composition of PM2.5 inside and in the local vicinity of AFOs can help to understand the impact of the AFO emissions on ambient secondary PM formation.

Ammonia concentrations and modeling of inorganic particulate matter in the vicinity of an egg production facility in Southeastern USA.

Ammonia (NH3) is an important base gas and can react with acidic species to form atmospheric aerosols. Due to the rapid growth of poultry and swine production in the North Carolina Coastal Plain, atmospheric NH3 concentrations across the region have subsequently increased. Ammonia concentrations and inorganic particulate matter (PM) at four ambient stations in the vicinity of an egg production facility were measured for 1 year using PM2.

Leaching of nutrients and trace elements from stockpiled turkey litter into soil.

In addition to nutrients, poultry are fed trace elements (e.g., As) for therapeutic purposes.

Measuring ammonia concentrations and emissions from agricultural land and liquid surfaces: a review.

Aerial ammonia concentrations (Cg) are measured using acid scrubbers, filter packs, denuders, or optical methods. Using Cg and wind speed or airflow rate, ammonia emission rate or flux can be directly estimated using enclosures or micrometeorological methods. Using nitrogen (N) recovery is not recommended, mainly because the different gaseous N components cannot be separated.

Cool temperature performance of a wheat straw biofilter for treating dairy wastewater.

A wheat straw biofilter was evaluated for attenuating pollutants in dairy (milkhouse and milking parlor) wastewater. During the 14-day study, the biofilter was operated in a sequential aerobic-anaerobic mode in a temperature range of 8-14 degrees C. While the biofilter was very effective (89% removal) in attenuating total suspended solids and moderately effective (76% removal) in attenuating oil and grease, its effectiveness in attenuating chemical oxygen demand was low (37% removal).