Livestock and Poultry Environmental Learning Community
Connecting agri-professionals advancing environmental stewardship in animal agriculture
The purpose of this project was to demonstrate a mobile fluidized-bed cone for extraction of phosphorus in the form of struvite (magnesium-ammonium phosphate) from undigested (raw) liquid dairy manure. Since Ca binds inorganic P, a particular emphasis was placed on evaluating the effect of oxalic acid as an acidifier and Ca binder.…
Many states have regulations that require education for livestock producers and manure applicators. Adults that must attend these types of programs are often there solely to fulfill requirements and are not willing learners. While regulations may specify topics that must be addressed, most do not spell out teaching methods for these educational programs.…
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.…
Nutrient budgets have been historically developed on livestock farms to improve nutrient use efficiency and reduce field losses. There is growing interest in developing nutrient budgets, particularly for nitrogen and phosphorus, on larger spatial scales such as watersheds and river basins to guide water quality improvement efforts.…
In this mesophilic solid-state anaerobic co-digestion study, interaction among process parameters were investigated. To achieve this, four treatments were considered based on two carbon to nitrogen ratios (34 and 28). The treatments were DMCS34 – Dairy manure, inoculum, and untreated corn stover with C/N ratio of 34; DMCS28 – Dairy manure, inoculum, and untreated corn stover with C/N ratio of 28; DMPCS34 – Dairy manure, inoculum, and washed pretreated corn stover with C/N ratio of 34; and DMPCS28 – Dairy manure, inoculum, and washed pretreated corn stover with C/N ratio of 28.…
Over the last 15 years it has become common to build new poultry production facilities on a piece of property that will provide the necessary land area for all of the barns and support facilities, and that comply with the setbacks (i.e. surface water, nearest neighbors) required by local, state, and federal regulations.…
Solid state anaerobic co-digestion (SSCoD) has attracted huge attention in the renewable energy industry due to the potential to solve nutrient imbalance challenge. However, SSCoD potential as biogas source is often limited except the process parameters are systematically optimized. Hence, in this study, we investigated the impact of 4%-NaOH-pretreatment and two agitation frequencies (two-day and seven-day periodic agitation), being part of the process parameters, on biogas composition and methane yield.…
This presentation will provide an overview of Pennsylvania’s Commercial Manure Hauler and Broker Certification program and highlight results of the industry survey. Pennsylvania’s Manure Hauler and Broker Certification Program was mandated by state law in 2006. The unique program has five certification levels, each with unique education requirements (Table 1).…
The University of Nebraska – Lincoln (UNL) Animal Manure Management (AMM) Team has supported the environmental stewardship goals of Nebraska’s livestock and crop producers for many years using multiple traditional delivery methods, but recently recognized the need to more actively engage with clientele through content marketing activities.…
Animal manures contain nutrients [primarily nitrogen (N) and phosphorus (P)] and organic material that are beneficial to crops. Unfortunately, for economic and logistics reasons, dairy manure tends to be applied to soils near where it is generated. Over time P concentrations in soils where dairy manure is applied builds up, and is often in excess of crop demands.…