PERFORMANCE OF A CONTACT STABILIZATION PROCESS FOR DOMESTIC WASTEWATER TREATMENT OF CALI, COLOMBIA
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| Format: | Artículo científico |
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Universidad Nacional de Colombia
2011
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| author | NANCY VÁSQUEZ SARRIA |
| author_facet | NANCY VÁSQUEZ SARRIA |
| contents | PERFORMANCE OF A CONTACT STABILIZATION PROCESS FOR DOMESTIC WASTEWATER TREATMENT OF CALI, COLOMBIA NANCY VÁSQUEZ SARRIA JENNY RODRÍGUEZ VICTORIA PATRICIA TORRES LOZADA CARLOS MADERA PARRA Ingeniería Activated sludge contact stabilization organic matter removal secondary wastewater treatment The contact stabilization process has been applied in full-scale plants which treat domestic wastewater. The main advantage of this process is the short hydraulic retention time (HRT) in the contact reactor (CR), allowing treatment volumes significantly lower than in conventional activated sludge processes. This paper presents an analysis of the influence of the HRT and sludge recycle rate (r), on the performance of a contact stabilization process to remove organic matter and solids from the domestic wastewater of the city of Cali (Colombia). The research was carried out at Cañaveralejo Wastewater Treatment Plant (C-WWTP) facilities. The contact stabilization process was assessed at a pilot-scale unit treating raw wastewater influent to the C-WWTP. The HRT varied between 0.84 to 1.66 h in the contact reactor and 2.56 to 4.65 h in the stabilization reactor (SR). The evaluation of HRT was carried out with different r varying between 40 and 100%. The operational conditions that allowed for us to obtain the best performance in terms of organic load removal (14.05 kgCOD.d-1), with removal efficiencies of chemical oxygen demand (COD), biological oxygen demand (BOD5), and total suspended solids (TSS) of 86, 87, and 82 %, respectively, were an HRT of 0.84 h in CR, and 4.11 h in SR, with a sludge recycle rate of 40%. In order to guarantee this performance, average values of sludge retention time (SRT) of 6 d; a volumetric organic load (VOL) of 2.13 kgBOD5.(m3.d) -1; a food microorganism relation (F/M) of 0.89 kgBOD5.(kgVSS.d)-1; and a mixed liquor volatile suspended solids (MLVSS) of 1125 mg.L-1 in CR, and 3173 mg.L-1 in SR, must be maintained. 2011 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49622401012 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.168 Vol.78 |
| format | Artículo científico |
| id | redalyc_49622401012 |
| institution | Redalyc |
| language | en |
| publishDate | 2011 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | PERFORMANCE OF A CONTACT STABILIZATION PROCESS FOR DOMESTIC WASTEWATER TREATMENT OF CALI, COLOMBIA NANCY VÁSQUEZ SARRIA Ingeniería Activated sludge contact stabilization organic matter removal secondary wastewater treatment PERFORMANCE OF A CONTACT STABILIZATION PROCESS FOR DOMESTIC WASTEWATER TREATMENT OF CALI, COLOMBIA NANCY VÁSQUEZ SARRIA JENNY RODRÍGUEZ VICTORIA PATRICIA TORRES LOZADA CARLOS MADERA PARRA Ingeniería Activated sludge contact stabilization organic matter removal secondary wastewater treatment The contact stabilization process has been applied in full-scale plants which treat domestic wastewater. The main advantage of this process is the short hydraulic retention time (HRT) in the contact reactor (CR), allowing treatment volumes significantly lower than in conventional activated sludge processes. This paper presents an analysis of the influence of the HRT and sludge recycle rate (r), on the performance of a contact stabilization process to remove organic matter and solids from the domestic wastewater of the city of Cali (Colombia). The research was carried out at Cañaveralejo Wastewater Treatment Plant (C-WWTP) facilities. The contact stabilization process was assessed at a pilot-scale unit treating raw wastewater influent to the C-WWTP. The HRT varied between 0.84 to 1.66 h in the contact reactor and 2.56 to 4.65 h in the stabilization reactor (SR). The evaluation of HRT was carried out with different r varying between 40 and 100%. The operational conditions that allowed for us to obtain the best performance in terms of organic load removal (14.05 kgCOD.d-1), with removal efficiencies of chemical oxygen demand (COD), biological oxygen demand (BOD5), and total suspended solids (TSS) of 86, 87, and 82 %, respectively, were an HRT of 0.84 h in CR, and 4.11 h in SR, with a sludge recycle rate of 40%. In order to guarantee this performance, average values of sludge retention time (SRT) of 6 d; a volumetric organic load (VOL) of 2.13 kgBOD5.(m3.d) -1; a food microorganism relation (F/M) of 0.89 kgBOD5.(kgVSS.d)-1; and a mixed liquor volatile suspended solids (MLVSS) of 1125 mg.L-1 in CR, and 3173 mg.L-1 in SR, must be maintained. 2011 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49622401012 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.168 Vol.78 |
| title | PERFORMANCE OF A CONTACT STABILIZATION PROCESS FOR DOMESTIC WASTEWATER TREATMENT OF CALI, COLOMBIA |
| topic | Ingeniería Activated sludge contact stabilization organic matter removal secondary wastewater treatment |
| url | https://www.redalyc.org/articulo.oa?id=49622401012 |