Aerobic treatment of liquid swine manure using polymer: Evaluation for ammonia emissions reduction and nitrogen retention
| Autor: | Terry Tindall, Lide Chen, Gopi Krishna Kafle, Sai Krishna Reddy Yadanaparthi, Benton B Glaze |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
General Chemical Engineering Inorganic chemistry Significant difference Chemical oxygen demand chemistry.chemical_element 04 agricultural and veterinary sciences Polymer 010501 environmental sciences 01 natural sciences Manure Nitrogen Industrial and Manufacturing Engineering Ammonia chemistry.chemical_compound Animal science chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Ton Kjeldahl method 0105 earth and related environmental sciences Food Science |
| Zdroj: | Engineering in Agriculture, Environment and Food. 9:257-263 |
| ISSN: | 1881-8366 |
| DOI: | 10.1016/j.eaef.2016.01.005 |
| Popis: | In the present study, the effectiveness of polymer (maleic-itaconic acid) on ammonia (NH 3 ) emissions reduction and in retaining nitrogen (N) in fresh liquid swine manure (SM) was evaluated. The relationship between pH and NH 3 emission was also determined. Different doses of polymer (namely Treatment 1 = T1 = 0.8 L polymer/ton of manure, Treatment 2 = T2 = 1.6 L polymer/ton of manure, Treatment 3 = T3 = 2.4 L polymer/ton of manure, and Treatment 4 = T4 = 3.2 L polymer/ton of manure) were added to the SM and its effects were observed for 30 d. The tests results showed significant reduction in pH for T1, T2, T3 and T4 compared to control (C). For the short term (up to 3d) T2, T3, and T4 showed significantly lower NH 3 gas concentrations than C, however, for the long term (up to 10–20 d) only T4 continued to indicate significantly lower NH 3 gas concentrations. Although numeric observations were reported for other treatments (T1, T2 and T3), no significant differences in NH 3 gas concentrations were found. The NH 3 emissions reductions were calculated in the range of 81–92%, 31–88%, −39–61%, 6–41%, −106% to −6% for the treatment period of 1, 3, 10, 20 and 30 d, respectively. The addition of polymer resulted in no significant difference in total ammonia nitrogen (TAN) and NO 3 − –N concentration. However, the addition of polymer had a significant influence on total Kjehldahl nitrogen (TKN) and soluble chemical oxygen demand (SCOD) concentration. The NH 3 gas emissions strongly correlated with the manure pH (R 2 = 0.911–0.999). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|