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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=37023102 |
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Table of Contents:
- Reduction of solids and organic load concentrations in tequila vinasses using a polyacrylamide (pam) polymer flocculant Gilberto Íñiguez-Covarrubias Francisco Peraza-Luna Ciencias de la Tierra rotating screen tequila vinasses solids separation polycrylamide (PAM) This study consisted of three experiments designed to evaluate the practicality of usinga cationic polyacrylamide (PAM) polymer flocculant to reduce commonly used aquaticpollution indicators in tequila vinasses. A first experiment with a 2 x 2 factorial arrangementwas used to observe the effects on vinasses of five different concentrationsof PAM (20, 60, 100, 140 and 180 g/L) at two different temperatures, 25 and 90 °C.In a second experiment vinasses from different tequila factories were treated with 200mg/L of PAM and the flocculated solids separated in a pilot-scale cylindrical rotatingscreen separator constructed of non-oxidized steel. In a third experiment the flocculationstudy was carried out in a small tequila factory using 4,500 liters of tequila vinassestreated with 200 mg/L of PAM discharged from three different pot stills. Recoveredflocculated solids (g/L), settleable solids (SS, ml/L), total solids (TS, mg/L), totalsuspended solids (TSS, mg/L), total dissolved solids (TDS, mg/L) and chemical oxygendemand (COD, mg/L) concentrations were the evaluated answer parameters. Themajor effect in the PAM addition to vinasses samples in the two different temperatureconditions, was reflected in the removal efficiency of SS and TSS. In SS concentrationof treated vinasses there was a significant effect (p<0.05) due to temperature and PAMconcentrations so as well as an interaction between both factors. TS removal efficiencywas affected by the temperature and PAM concentration and there was no interactionamong the temperature and coagulant concentration (p<0.05). COD concentrationin vinasses samples, was affected only by the coagulant concentration, there was nointeraction among temperature and coagulant concentration (p<0.05). Vinasse coolingand pH adjustment was not considered necessary for optimal polymer-amendedvinasses solids separation. For vinasses with a SS of 400 mg/L or less an addition of200 mg/L of PAM it is expected to have optimal removal values of SS and relativelyacceptable values of TS, TSS and COD. Estimate costs associated with the level ofPAM used in this study corresponded to 0.076 dollar per liter when the PAM cost was3.8 dollar per kilogram. 2007 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37023102 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.1 Vol.23