How Can Algae Be Used to Manage Nutrients in Pig Manure?

green stylized pig logoUsually when people see the words “algae” and “manure” in the same paragraph, it is usually a negative take on the effects of manure nutrients on water. When excess nutrients are transported to water bodies (from lawn fertilizer, municipal waste treatment plants, manure and/or commercial crop fertilizer) algae use those nutrients and grow rapidly.…

Does Manure Solid-Liquid Separation Reduce Greenhouse Gas Emissions on Swine Farms?

green stylized pig logoThere is some research suggesting that separating swine manure into solids and liquids can slightly reduce greenhouse gas (GHG) emissions emitted from the manure itself. It is not likely to be significant enough for separation to be a viable strategy by itself.

The primary reason to use solid-liquid manure separation is to prepare manure for further treatment in a system that can:

  1. generate energy (such as anaerobic digestion, thermal technologies, etc.)
  2. produce products for re-use on a farm (such as bedding for dairy cows),
  3. generate compost or fertilizer.

What Is Gasification of Manure?

green stylized pig logoWhen looking at ways to improve the environmental impact of pig production, renewable energy generation is a popular topic. One such technology, gasification, is a series of chemical reactions (see image at bottom) that involve heating a suitable organic material in a controlled, low-oxygen environment to the point that the hydrocarbons (simple organic compounds that contain only hydrogen and carbon) are converted to synthesis gas (‘syngas’).…

What Is an Environmental Foot Print? (Ecological Footprint)

green stylized pig logoThe Cambridge dictionary defines environmental footprint as:

the effect that a person, company, activity, etc. has on the environment, for example the amount of natural resources that they use and the amount of harmful gases that they produce

Also referred to as an ecological footprint, this is a measure that attempts to consider multiple impacts of an activity rather than focus on a single one.…

Carbon Footprint, Life Cycle Assessment and the Pork Industry

green stylized pig logoAnimal agriculture in the U.S. contributes approximately 3.5% of all man-made greenhouse gases (GHGs). If you look at pork production, it accounts for just 0.34% of all emissions. (Source: U.S. EPA Greenhouse Gas Inventory released April, 2015).

When you total up all the GHG emissions from a particular activity or process, it is called a carbon footprint.