Project Number: 6082-12630-001-00-D
Project Type: In-House Appropriated
Start Date: Jul 27, 2016
End Date: Jul 5, 2021
1. Develop and test improved tillage and biomass management practices to enhance soil health and long-term agricultural productivity in the Southeastern Coastal Plain. 2. Develop manure treatment and handling systems that improve soil health and water quality while minimizing the emissions of greenhouse gases, odors and ammonia and the transport of phosphorus and pathogens. Subobjective 2a. Develop improved treatment systems and methods for ammonia and phosphorus recovery from liquid and solid wastes using gas-permeable membrane technology. Subobjective 2b. Develop improved biological treatment systems for liquid effluents and soils based on deammonification reaction using ARS patented bacterial anammox and high performance nitrifying sludge cultures. Subobjective 2c. Improve the ARS patented “Quick Wash” process for phosphorus recovery. Subobjective 2d. Assess treatment methods for their ability to reduce or eliminate pathogens and cell-free, microbially-derived DNA from agricultural waste streams. Subobjective 2e. Improved manure treatment and handling systems, and management strategies for minimizing emissions. Subobjective 2f. Assess the impact of manure treatment and handling systems on agricultural ecosystem services for soil, water, and air quality conservation and protection. 3. Develop beneficial uses of agricultural, industrial, and municipal byproducts, including manure. Subobjective 3a. Evaluate application of designer biochars to soils to increase crop yields while improving soil health, increasing carbon sequestration, and reducing greenhouse gas emissions. Subobjective 3b. Develop methods and guidelines to remediate mine soils using designer biochars. Subobjective 3c. Evaluate the agronomic value of byproducts produced from emerging manure and municipal waste treatment technologies.
New management practices and treatment technologies are required to help the nation’s crop and animal producers meet increasing economic and environmental challenges. These challenges include increasing soil productivity and health, as well as reducing unwanted atmospheric emissions, excessive nutrients, pathogens, and odors while concomitantly improving the affordability of animal waste treatment. To solve these challenges this research will pursue three complementary objectives. First, improved tillage and biomass management practices will be developed to enhance soil health and long-term agricultural productivity for Southeastern Coastal Plain soils. Long-term conservation tillage and crop management practices, including stover management and cover crops, will be evaluated to enhance soil productivity and limit the impact of climate change while enhancing nutrient cycling and carbon sequestration. Second, new manure treatment and handling technologies will be developed to improve soil health and water quality; to minimize emissions of greenhouse gases, odors, ammonia, and pathogens; and to maximize nutrient recovery. These technologies include: recovery of ammonia from manure using gas permeable membranes, enhanced biological nitrogen treatment via deammonification, biochar systems engineered to reduce odor, and new and improved methods of recovering phosphorus from manure. This research project will include covered anaerobic lagoons, thermal treatment, and acidification as technologies to reduce or destroy manure pathogens prior to land application. Third, we will develop beneficial uses for byproducts of manure treatments. This includes the use of biochars and hydrochars byproducts as soil amendments to improve physical and chemical properties, and as a fertilizer source for crop production. Research methods include laboratory, pilot-scale, and field-scale experiments using modern analytical equipment. Research products will advance the state of the science for more effective conservation and management of soil resources, innovative animal waste treatment technologies as environmentally-safe alternatives to traditional land application, and guidelines for beneficial byproduct utilization. Nationwide livestock producers, as well as Southeastern crop producers, will benefit from the findings of this research.