Volatile Solids Removal and Pathogens Inactivation in Activated Sludge during Thermophilic Aerobic Digestion

Publish Year: 1383
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

NICEC09_040

تاریخ نمایه سازی: 14 فروردین 1386

Abstract:

A typical activated sludge was digested aerobically in a batch digester in the temperature range of 10 to 80°C. Reaction rate constants were determined by measuring the amounts of volatile suspended solids (VSS) removed at different time 1 intervals during the process. The maximum value of the reaction rate constant (0.45 d ) occurred in the temperature range of 55-60°C. Removal of indicator organisms (pathogens) in the sludge, during the batch digestion, was also studied. Sludge digestion at 60°C provided a noticeable difference in reduction of indicator organisms as compared to digestion carried out at 55°C.

Keywords:

activated sludge , aerobic digestion , volatile suspended solids , and pathogen inactivation.

Authors

محسن نصرتی

Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University

سید عباس شجااوصادتی

Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University

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