Evaluation of current products for use in deep pit swine manure storage structures for mitigation of odors and reduction of NH3, H2S, and VOC emissions from stored swine manure

The main purpose of this research project is an evaluation of the current products available in the open marketplace for using in deep pit swine manure structure as to their effectiveness in mitigation of odors and reduction of hydrogen sulfide (H2S), ammonia (NH3), 11 odorous volatile organic compounds (VOCs) and greenhouse gas (CO2, methane and nitrous oxide) emissions from stored swine manure.…

Sidedressing Corn: Swine Manure via Dragline Hose Produces Yields Comparable to Synthetic Fertilizer

Spring in the upper Midwest can be short, resulting in challenges for producers to apply manure and plant crops in a timely manner to maximize yield. This results in a significant       amount of manure applied in the fall after the crop is harvested. Fall applied manure has ample time to mineralize and leave the root zone before next season’s crop can utilize the nutrients.

Exploring Interactions Betwen Agricultural Decisions and Greenhouse Gas Emissions Using Swine Production

green stylized pig logoThe materials on this page are an interactive lab designed to introduce students (high school level) to pig farming and the connections between management decisions  and the greenhouse gas emissions. It also includes information on the economic implications of those decisions. Background information and activities are provided in a graphical (visual) format.…

Anaerobic Digestion Projects: Environmental Credits 101

Several renewable natural gas (RNG) projects are either recently completed or on the books as potential new projects. With such a new business model, Washington State University, in concert with State officials embarked on a feasibility study to investigate costs/revenues as well as project consideration, hurdles and options for production of RNG as compared to an industry standard combined heat and power (CHP) model.…

Swine Manure Odor Reduction Using a Humic Amendment: On-Farm Demonstration


Why Study Odors from Pig Farms?

Odor-related nuisance complaints associated with animal production facilities are on the rise as residential sprawl encroaches on once rural areas. The efficacy of odor control additives is highly variable and most have limited success. This project demonstrated the efficacy of a commercial humic-material product (ManureMaxTM, Manufactured by JDMV Holding, LLC; Huston, TX) for limited control of liquid swine manure odors.…

Initial Evaluation of Vegetated Treatment Areas for Treating Runoff from Small Swine Operations in Central Texas

A vegetative treatment area (VTA), as defined by USDA-NRCS, is a “vegetative area composed of perennial grass or forages used for the treatment of runoff from an open lot production system or other process waters”. VTA’s are typically part of a vegetative treatment system (VTS) that includes additional components to remove solids, such as a settling or vegetative infiltration basin.…