SOILS AS NATURAL REACTORS FOR SWINE WASTEWATER TREATMENT
The ability of soils as natural reactors depends of soil properties such as organic matter content (OM), cation exchange capacity (CEC) and percentage of clay (PC) as well as the properties waste in question, in this case, swine wastewater (SWW) Pedotransfer functions (PTF) enable certain processes...
| Authors: | , , |
|---|---|
| Format: | article |
| Status: | Published version |
| Publication Date: | 2011 |
| Country: | México |
| Institution: | Universidad Nacional Autónoma de México |
| Repository: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:93917767008 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=93917767008 |
| Access Level: | Open access |
| Keyword: | Agrociencias Mineralisation soil carbon evolution pedotransfer functions dissolved organic matter |
| Summary: | The ability of soils as natural reactors depends of soil properties such as organic matter content (OM), cation exchange capacity (CEC) and percentage of clay (PC) as well as the properties waste in question, in this case, swine wastewater (SWW) Pedotransfer functions (PTF) enable certain processes to be determined from easily measured soil properties. The aims of this study were i) to generate PTF to estimate the retention and mineralisation of dissolved organic matter (DOM) present in swine wastewater (SWW) based on measurements of OM, CEC and PC and ii) to identify the soils most suited to acting as natural reactors for treating SWW, using multicriteria analysis. Samples were taken from ten soils (epipedons or superficial samples) to measure the retention of dissolved organic matter (RDOM) in 30 cm high soil columns, making three applications of SWW. In addition, an experiment was carried out in pots to measure the effect of SWW on soil carbon evolution (SCE) and the potential anaerobic nitrogen mineralisation (PANM). Multiple regressions were made using soil OM (%), CEC (cmol+ kg-1) and PC (%) as independent variables and RDOM (measured as chemical oxygen demand), SCE and PANM as dependent variables. The PFT found were: RDOM = 41.5 + (2.8*CEC) - (0.81*PC) - (3.5*OM) r= 0.81; SCE = 542.3 + (20.1*OM) + (4.6*CEC) - (2.7*PC) r= 0.96; PANM = -8.4 + (3.45*OM) + (1.12*PC) - (2.20*CEC) r= 0.88. The most suitable soils for acting as natural reactors of SWW were the Luvisol (LVct) and an unclassified EPI-1. |
|---|