Sanitization of biosolids from chemically enhanced primary treatment plant: composting or alkali stabilization?
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad del Valle
2011
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| _version_ | 1876424481249951744 |
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| author | Carlos A. Madera-Parra |
| author_facet | Carlos A. Madera-Parra |
| contents | Sanitization of biosolids from chemically enhanced primary treatment plant: composting or alkali stabilization? Carlos A. Madera-Parra Duncan D. Mara Patricia Torres Ingeniería Biosolids Composting Alkali treatment Chemically Enhanced Primary Treatment This study was aimed at evaluating two pathogen reduction alternatives: composting and alkali stabilization of biosolids at the Cañaveralejo Wastewater Treatment Plant (PTAR-C), based in Cali, Colombia. Composting was used (biosolids; Filter press mud; biosolids (B) + filter press mud (C) + pruning trees (P); biosolids (B) + Organic waste from open market (ROPM) + pruning trees (P)) for a 61-days period. Alkali treatment was carried out for 13 days. Slaked lime and coal ash were applied to the biosolids and final products of composting. 8, 15 and 30 % (weight/weight) were the concentrations used for hydrated lime and ash. For both treatments pH, humidity, temperature, Chemical Oxygen Demand (COD), Total Kjeldahl Nitrogen (TKN), Ammonium Nitrogen (N-NH ), helminth eggs, and Faecal Coliforms (FC) were monitored. The 4 results showed that the better compost was (B+C+P) removed pathogens, but compost remained as a class B category, with geometric mean for FC of 4x103 UFC g-1, indicating that the process cannot achieve a class A category. Alkali stabilization showed that coal ash produced similar microbiological FC quality of composting for all concentrations, revealing that it is a weak technology from a cost-effective point of view. Slacked lime with 30 and 15% (weight/weight) concentrations achieved FC zero (0) UFC g-1, meeting the Environmental Protection Agency EPA standard for a class A. This situation can be associated with raising the pH. For 8% (weight/weight) concentration microbiological quality was lower than the former and did not achieve a class A. 2011 artículo científico 0123-3033 https://www.redalyc.org/articulo.oa?id=291323530002 en http://www.redalyc.org/revista.oa?id=2913 Ingeniería y Competitividad application/pdf Universidad del Valle Ingeniería y Competitividad (Colombia) Num.2 Vol.13 |
| format | Artículo científico |
| id | redalyc_291323530002 |
| institution | Redalyc |
| language | en |
| publishDate | 2011 |
| publisher | Universidad del Valle |
| spellingShingle | Sanitization of biosolids from chemically enhanced primary treatment plant: composting or alkali stabilization? Carlos A. Madera-Parra Ingeniería Biosolids Composting Alkali treatment Chemically Enhanced Primary Treatment Sanitization of biosolids from chemically enhanced primary treatment plant: composting or alkali stabilization? Carlos A. Madera-Parra Duncan D. Mara Patricia Torres Ingeniería Biosolids Composting Alkali treatment Chemically Enhanced Primary Treatment This study was aimed at evaluating two pathogen reduction alternatives: composting and alkali stabilization of biosolids at the Cañaveralejo Wastewater Treatment Plant (PTAR-C), based in Cali, Colombia. Composting was used (biosolids; Filter press mud; biosolids (B) + filter press mud (C) + pruning trees (P); biosolids (B) + Organic waste from open market (ROPM) + pruning trees (P)) for a 61-days period. Alkali treatment was carried out for 13 days. Slaked lime and coal ash were applied to the biosolids and final products of composting. 8, 15 and 30 % (weight/weight) were the concentrations used for hydrated lime and ash. For both treatments pH, humidity, temperature, Chemical Oxygen Demand (COD), Total Kjeldahl Nitrogen (TKN), Ammonium Nitrogen (N-NH ), helminth eggs, and Faecal Coliforms (FC) were monitored. The 4 results showed that the better compost was (B+C+P) removed pathogens, but compost remained as a class B category, with geometric mean for FC of 4x103 UFC g-1, indicating that the process cannot achieve a class A category. Alkali stabilization showed that coal ash produced similar microbiological FC quality of composting for all concentrations, revealing that it is a weak technology from a cost-effective point of view. Slacked lime with 30 and 15% (weight/weight) concentrations achieved FC zero (0) UFC g-1, meeting the Environmental Protection Agency EPA standard for a class A. This situation can be associated with raising the pH. For 8% (weight/weight) concentration microbiological quality was lower than the former and did not achieve a class A. 2011 artículo científico 0123-3033 https://www.redalyc.org/articulo.oa?id=291323530002 en http://www.redalyc.org/revista.oa?id=2913 Ingeniería y Competitividad application/pdf Universidad del Valle Ingeniería y Competitividad (Colombia) Num.2 Vol.13 |
| title | Sanitization of biosolids from chemically enhanced primary treatment plant: composting or alkali stabilization? |
| topic | Ingeniería Biosolids Composting Alkali treatment Chemically Enhanced Primary Treatment |
| url | https://www.redalyc.org/articulo.oa?id=291323530002 |