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Effect of A Microbial Additive on the Removal of nutrients in Swine Manure by Aeration

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  034152,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13894) @2003
Authors:   Jun Zhu, Ancheng Luo, Zhijian Zhang
Keywords:   Microbial additives, Nutrient removal, Liquid swine manure, Aeration

The research presented in this paper evaluated a technique in removing nutrients from swine manure by use of a manure additive (Sporzyme), coupled with aeration treatment. Plastic columns, 91.6 cm in height and 15.3 cm in internal diameter, were each filled with 15 L liquid swine manure and aeration was provided by an air pump to each column at an airflow rate of 2.0 L/minute controlled by individual airflow meters mounted on the columns. The experiment included five treatments, i.e., 1) control (without aeration and the microbial additive); 2) aeration without the microbial additive; 3) aeration with the microbial additive (Sporzyme); 4) aeration with activated sludge seeded without pre-aeration anaerobic incubation; and 5) aeration with activated sludge seeded with 3 days pre-aeration anaerobic incubation. The results indicated that TKN and ammonia- N were reduced by 41.5% and 56.3%, respectively. The removal of TKN is found to be mainly attributed to the volatilization of ammonia because its share of TKN is remarkably reduced at the end of the test. Data from this study show that there is no advantage of using either Sporzyme or the activated sludge as seeding to enhance the nutrient removal in swine manure under aeration treatment since there is no difference found in terms of either nitrogen or phosphorus removal between treatments with and without additives.

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