Optimum doses of Mg and P salts for precipitating ammonia into struvite crystals in aerobic composting
| Autor: | Yeon-Koo Jeong, Sun-Jin Hwang |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Environmental Engineering
Time Factors Struvite Inorganic chemistry Salt (chemistry) chemistry.chemical_element Magnesium Compounds Bioengineering Context (language use) engineering.material complex mixtures Phosphates Ammonia production Ammonia chemistry.chemical_compound Soil Bioreactors Chemical Precipitation Magnesium Waste Management and Disposal Kjeldahl method chemistry.chemical_classification Korea Renewable Energy Sustainability and the Environment Compost Temperature Phosphorus General Medicine Hydrogen-Ion Concentration Nitrogen chemistry engineering Salts Nuclear chemistry |
| Zdroj: | Bioresource technology. 96(1) |
| ISSN: | 0960-8524 |
| Popis: | It was previously reported that struvite crystals could be formed in the aerobic composting reaction provided that Mg and P salts are added [Bioresource Technology 79 (2001) 129]. The formation of struvite crystals significantly reduced gaseous loss of ammonia and resulted in substantial increase in the ammonia content in the compost, attaining 1.5%. In this context, the present study was conducted to determine the optimal doses of Mg and P salts for struvite crystallization. It was found that cumulative ammonia production was about 33-36% of the initial total nitrogen in the aerobic composting reaction, irrespective of the amounts of Mg and P salts added. The theoretical doses for complete conversion of ammonia into struvite crystals seemed to be about 33-36% of the initial nitrogen. The addition of Mg and P salts at this level, however, caused adverse effects on the degradation of organic materials. Therefore, it was concluded that the optimal doses of Mg and P salts should be about 20% of the initial nitrogen in the compost mixture not to cause any harmful effects on the composting reaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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