| dc.creator | Ma,Xiaoyan | |
| dc.creator | Liu,Ming | |
| dc.creator | Li,Zhongpei | |
| dc.date | 2015-06-01 | |
| dc.date.accessioned | 2019-04-24T21:20:05Z | |
| dc.date.available | 2019-04-24T21:20:05Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000200012 | |
| dc.identifier.uri | http://revistaschilenas.uchile.cl/handle/2250/56025 | |
| dc.description | Land application of intensive swine farm wastewater has raised serious environmental concerns due to the accumulation and microbially mediated transformation of large amounts of swine wastewater organic C (SWOC). Therefore, the study of SWOC mineralization and dynamics of wastewater microorganisms is essential to understand the environmental impacts of swine wastewater application. We measured the C mineralization of incubated swine wastewaters with high (wastewater H) and low (wastewater L) organic C concentrations. The dynamics of bacteria metabolic profile and community structure were also investigated. The results showed that SWOC mineralization was properly fitted by the two-simultaneous reactions model. The initial potential rate of labile C mineralization of wastewater H was 46% higher than that of wastewater L, whereas the initial potential rates of recalcitrant C mineralization of wastewaters H and L were both around 23 mg L-1 d-1. The bacterial functional and structural diversities significantly decreased for both the wastewaters during SWOC mineralization, and were all negatively correlated to specific UV absorbance (SUVA254; P < 0.01). The bacteria in the raw wastewaters exhibited functional similarity, and both metabolic profile and community structure changed with the mineralization of SWOC, mainly under the influence of SUVA254 (P < 0.001). These results suggested that SWOC mineralization was characterized by rapid mineralization of labile C and subsequent slow decomposition of recalcitrant C pool, and the quality of SWOC varied between the wastewaters with different amounts of organic C. The decreased bio-availability of dissolved organic matter affected the dynamics of wastewater bacteria during SWOC mineralization. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Instituto de Investigaciones Agropecuarias, INIA | |
| dc.relation | 10.4067/S0718-58392015000200012 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Chilean journal of agricultural research v.75 n.2 2015 | |
| dc.subject | Carbon mineralization | |
| dc.subject | community level physiological profiles | |
| dc.subject | denaturing gradient gel electrophoresi | |
| dc.subject | SUVA254 | |
| dc.subject | swine wastewater organic carbon | |
| dc.title | Dynamics of bacterial metabolic profile and community structure during the mineralization of organic carbon in intensive swine farm wastewater | |
