Abstract
The removal efficiency of Cu and Zn from swine wastewater was evaluated as effected by three variables: the hydraulic retention time (HRT) (24, 48, 72 and 96 hours), two different plant species (Typha domingensis Pers. and Eleocharis cellulosa) and two different sizes of filter media (5 and 15 mm) using a horizontal sub-surface flow constructed wetland. From the results, a significant difference was observed in the removal efficiency of Cu and Zn with respect to different hydraulic retention times. The best results were obtained in the HRT of 96 hours for Zn where 96% removal of Zn with Typha domingensis Pers. specie with gravel of 15 mm (experimental unit 6) was achieved. For Cu, at 72 hours of HRT, the efficiency was nearly 100% in five of the six study units (1, 2, 3, 5 and 6). In contrast, in experimental unit 4 with gravel of 15 mm and without plants, only 86% Cu removal was achieved.
Highlights
The removal efficiency of Cu and Zn from swine wastewater was evaluated as effected by three variables: the hydraulic retention time (HRT) (24, 48, 72 and 96 hours), two different plant species (Typha domingensis Pers. and Eleocharis cellulosa) and two different sizes of filter media (5 and 15 mm) using a horizontal sub-surface flow constructed wetland
The objective of this study was to evaluate the effect of plant species, filter media and hydraulic retention time (HRT) with respect to the removal of heavy metals (HMs), Cu and Zn, from wastewater of the pig sector using a system of horizontal sub-surface flow (HSSF)-Constructed wetlands (CWs) to reduce the negative impact generated by these metals in the environment
Comparing the HMs results in swine wastewater obtained in the present study during it is characterization with the Mexican Official Standard (NOM-001-ECOL1996) [25], five of the nine results for Zn and Cu were found to be above the permitted limit (10 and 4 mg/L, respectively)
Summary
In Mexico, the aquifer resource is scarce and drinking water is expensive. That implies the necessity to carry out regulatory actions in order to protect this resource. Water can be exposed to many forms of contamination, mainly by anthropogenic sources such as domestic, industrial, and agricultural. Among animal activities developed in the country, swine production is important. It generates direct (49,000) and indirect (245,000) employees [1]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
