9161: Modeling C and N mineralization during decomposition of anaerobically digested and composted municipal solid waste
(2006) Modeling C and N mineralization during decomposition of anaerobically digested and composted municipal solid waste. [preprint]
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Summary
Application of municipal solid waste (MSW) to arable land can be used to close the nutrient cycle between urban and rural areas. The aim of the current study was to quantify net N mineralization and respiration from composted MSW (CMSW) and anaerobically digested MSW (ADMSW) applied to soil, and to test, whether a simple relationship between net N mineralization and respiration developed for plant materials, was applicable for these MSW’s. In a laboratory experiment, CMSW and ADMSW were incorporated into soil and incubated at 15 °C. During the 149 day experiment, net N mineralization and respiration was determined. Cumulated respiration derived from the MSW’s was very steep during the first 30 days, after which the cumulated respiration leveled off. However, calculated on the basis of applied C, the ADMSW was 10 times more degradable then the CMSW. Both MSW’s caused an initial net N immobilization followed by a re-mineralization. A simple model based on the relationship between net N mineralization and respiration, was only applicable for the MSW’s, after significant modifications. If farmers 2 should recognize CMSW and ADMSW, as valuable fertilizers, it is important that these can be produced with a higher maturity, in order to avoid initial immobilization.
| Document Language: | English |
|---|---|
| Keywords: | Compost, anaerobically digested, MSW, decomposition, nitrogen mineralization |
| Subject Areas: | Soil > Nutrient turnover |
| Research affiliation: | Denmark > KVL - The Royal Veterinary and Agricultural University Denmark > NERI - National Environmental Research Institute Denmark > DARCOF II (2000-2005) > III.3 (CRUCIAL) Closing the rural-urban nutrient cycle |
| Funding Part: | 75-100% |
| Total budget (Euro): | 0 |
| Orgprints ID Number: | 9161 |
| Contact: | Magid, Assoc. Prof. Jakob |
| Deposited On: | 31 August 2006 |
| EPrint Type: | Preprint |
| Peer Review Status: | Submitted for peer-review but not yet accepted |
| Additional Publishing Information: | The manuscript is submitted to Waste Management & Research |
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