Industrial Wastewater Treatment Using High Rate Activated Sludge and Alum Additive
| Autor: | Gaber El Enany, Medhat H. Elzahar, Mamdouh Y. Saleh, Mohamed Z. Elshikhipy |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
lcsh:GE1-350
Waste management Chemistry Alum Chemical oxygen demand COD Pulp and paper industry Mixed liquor suspended solids Industrial wastewater treatment chemistry.chemical_compound Activated sludge Enhanced biological phosphorus removal Pilot plant industrial wastewater nitrate Sewage sludge treatment lcsh:Environmental sciences phosphate General Environmental Science |
| Zdroj: | International Journal of Environmental Science and Development, Vol 5, Iss 6, Pp 551-556 (2014) |
| ISSN: | 2010-0264 |
| DOI: | 10.7763/ijesd.2014.v5.544 |
| Popis: | The high rate activated sludge stage of the multiple-stage sludge treatment plant is characterized by high efficiencies of treatment, cost, and size, compared to conventional activated sludge treatment plants. A pilot plant with an industrial discharge flow of 135L/h was designed according to the highly loaded activated sludge stage (A-stage). The plant simulated the biological and chemical treatment of sludge by adding alum to the aeration tank in dosages of 100, 150, 200 and 250 mg/L. The results clearly indicate that the highly-loaded activated sludge, the A-stage of the absorption/bio-oxidation system, has a high efficiency for the elimination of organic and inorganic matters. Without adding aluminum salt, the chemical oxygen demand, the total phosphate and the total nitrate were approximately 52.43%, 47.82%, and 40.09% respectively. The chemical-biological process with a dosage of 200mg/L alum resulted in 76.07% reduced chemical oxygen demand and improved efficiency of phosphate and nitrate removal to 73.5% and 66.98% respectively compared with the biological process in the A-stage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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