Effect of different struvite crystallization methods on gaseous emission and the comprehensive comparison during the composting
| Autor: | Yi Zhigang, Juan Yang, Tao Jiang, Guoxue Li, Qiong Tang, Chen Maoxia, Xuguang Ma |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Struvite Swine 020209 energy Inorganic chemistry chemistry.chemical_element Bioengineering 02 engineering and technology 010501 environmental sciences engineering.material 01 natural sciences law.invention Soil chemistry.chemical_compound Ammonia law 0202 electrical engineering electronic engineering information engineering Animals Crystallization Waste Management and Disposal Chemical composition 0105 earth and related environmental sciences Renewable Energy Sustainability and the Environment Compost Magnesium General Medicine Phosphate Nitrogen Manure chemistry engineering Gases |
| Zdroj: | Bioresource Technology. 217:219-226 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2016.02.046 |
| Popis: | This study compared 4 different struvite crystallization process (SCP) during the composting of pig feces. Four combinations of magnesium and phosphate salts (H3PO4+MgO (PMO), KH2PO4+MgSO4 (KPM), Ca(H2PO4)2+MgSO4 (CaPM), H3PO4+MgSO4 (PMS)) were assessed and were also compared to a control group (CK) without additives. The magnesium and phosphate salts were all supplemented at a level equivalent to 15% of the initial nitrogen content on a molar basis. The SCP significantly reduced NH3 emission by 50.7-81.8%, but not the N2O. Although PMS group had the lowest NH3 emission rate, the PMO treatment had the highest struvite content in the end product. The addition of sulphate decreased CH4 emission by 60.8-74.6%. The CaPM treatment significantly decreased NH3 (59.2%) and CH4 (64.9%) emission and yielded compost that was completely matured. Due to its effective performance and low cost, the CaPM was suggested to be used in practice. |
| Databáze: | OpenAIRE |
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