U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Coastal Plain Soil, Water and Plant Conservation Research: Florence, SC
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Mission
                    Outreach
                        Activities for studentsSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Florence, South Carolina Coastal Plain Soil, Water and Plant Conservation Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Ro, Kyoungitem
                                            Novak, Jeffreyitem
                                            JOHNSON, M - Environmental Protection Agency (EPA)item
                                            Szogi, Arielitem
                                            LIBRA, J - Leibniz Instituteitem
                                            Spokas, Kurtitem
                                            BAE, S. - Seoul Women'S University
  Submitted to: Chemosphere
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 5/8/2015
                                    Publication  Date: 5/23/2015
                                    Citation: Ro, K.S., Novak, J.M., Johnson, M.G., Szogi, A.A., Libra, J.A., Spokas, K.A., Bae, S. 2015. Leachate water quality of soils amended with different swine manure-based amendments. Chemosphere. 142:92-99. doi:10.1016/j.chemosphere.2015.05.023.Interpretive Summary: Hydrochar is a carbonaceous solid made from heating wet biomass slurry under pressure (wet pyrolysis).  This study evaluated the potential of hydrochar made from swine manure as a soil amendment.  Soil fertility and water quality characteristics of swine hydrochar amended soils were compared with other swine based soil amendments such as raw swine manure, swine compost, and thermal swine char made from dry pyrolysis.  All swine manure-based amendments significantly increased soil carbon, cation exchange capacity and available nutrient contents of the soil.  However, thermal swine char and swine compost amended soils leached high concentrations of phosphorus, which may cause water pollution problems for receiving water bodies.  On the other hand, swine hydrochar did not leach nutrients such as nitrogen, phosphorus, and potassium. Although it is still not clear how these nutrients were retained in the soil amended with hydrochar, it suggests a great potential for hydrochar as an alternative manure management option as the hydrochar can be soil applied while minimizing potential environmental issues from the leaching of high nutrient concentrations to water bodies.
                                Technical Abstract: In the face of the rising level of manure production from concentrated animal feeding operations (CAFOs), management options are being sought that can provide nutrient recycling for plant growth and improved soil conditions with minimal environmental impacts. Alternatives to direct manure application are composting and thermochemical conversion which can destroy pathogens and improve handling and storage. The effect of four forms of swine manure-based soil amendments (raw, compost, hydrochar, and pyrochar) on soil fertility and leachate water quality characteristics of a sandy soil were investigated in soil incubation experiments. All four amendments significantly increased soil carbon, cation exchange capacity and available nutrient contents of the soil. However, hydrochar amended soil leached lower amounts of nitrogen (N), phosphorus (P), and potassium (K) compared to the other amendments including the control. On the other hand, pyrochar and compost amended soil released higher concentrations of P and K. Subsequent tests on the hydrochar for K and N adsorption isotherms and surface analysis suggested that these nutrients were not sorbed directly to the hydrochar surface. Although it is still not clear how these nutrients were retained in the soil amended with hydrochar, it suggests a great potential for hydrochar as an alternative manure management option; the hydrochar can be soil applied while minimizing potential environmental issues from the leaching of high nutrient concentrations to water bodies.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov