Next Article in Journal
System to Evaluate Movement of Biological Contaminants in Soil
Next Article in Special Issue
Aeration to Improve Biogas Production by Recalcitrant Feedstock
Previous Article in Journal
Noise Assessment of Small Vessels for Action Planning in Canal Cities
Open AccessArticle

Application of Gas-Permeable Membranes For-Semi-Continuous Ammonia Recovery from Swine Manure

Agricultural Technological Institute of Castilla y Léon. Ctra. Burgos, km. 119, 47071 Valladolid, Spain
United States Department of Agriculture, Agricultural Research Service, Coastal Plains Soil, Water and Plant Research Center, 2611, W. Lucas St., Florence, SC 29501, USA
Author to whom correspondence should be addressed.
Environments 2019, 6(3), 32;
Received: 30 January 2019 / Revised: 1 March 2019 / Accepted: 3 March 2019 / Published: 6 March 2019
Gas-permeable membrane technology is a new strategy to minimize ammonia losses from manure, reducing pollution and recovering N in the form of an ammonium salt fertilizer. In this work, a new operational configuration to recover N using the gas-permeable membrane technology from swine manure was tested in a semi-continuous mode. It treated swine manure with a total ammonia nitrogen (TAN) concentration of 3451 mg L−1. The system was operated with low aeration rate (to raise pH), and with hydraulic retention times (HRT) of seven days (Period I) and five days (Period II) that provided total ammonia nitrogen loading rate (ALR) treatments of 491 and 696 mg TAN per L of reactor per day, respectively. Results showed a uniform TAN recovery rate of 27 g per m2 of membrane surface per day regardless of the ALR applied and the manure TAN concentration in the reactor. TAN removal reached 79% for Period I and 56% for Period II, with 90% of recovery by the membrane in both periods. Water capture in the acidic solution was also uniform during the experimental period. An increase in temperature of 3 °C of the acidic solution relative to the wastewater reduced 34% the osmotic distillation and water dilution of the product. These results suggested that the gas-permeable membrane technology operating in a semi-continuous mode has a great potential for TAN recovery from manure. View Full-Text
Keywords: total ammonia nitrogen; recovery; swine manure; gas-permeable membranes total ammonia nitrogen; recovery; swine manure; gas-permeable membranes
Show Figures

Graphical abstract

MDPI and ACS Style

Riaño, B.; Molinuevo-Salces, B.; Vanotti, M.B.; García-González, M.C. Application of Gas-Permeable Membranes For-Semi-Continuous Ammonia Recovery from Swine Manure. Environments 2019, 6, 32.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop