Tailing propensity in the ultraviolet disinfection of trickling filter and activated sludge wastewater treatment processes

Nitrogen Removal in a Full-Scale Domestic Wastewater Treatment Plant with Activated Sludge and Trickling Filter

During the last decade, more stringent effluent requirements concerning the nutrients effluent values have been imposed by legislation and social concern. In this study, efficiency of total nitrogen removal in activated sludge and trickling filter processes (AS/TF) was investigated in Tehran North wastewater treatment plant. Biological system in this site was included, anoxic selector tank, aer...

Cost Analysis of Trickling-filtration and Activated-sludge Plants for the Treatment of Municipal Wastewater

Cost estimation is an important consideration for the development and evaluation of wastewater treatment alternatives. This paper evaluates the most cost-effective treatment scheme among different plants employing two biological processes most commonly used for the treatment of municipal wastewater in Saudi Arabia, activated sludge and trickling filtration, by using a computer-based treatment c...

Coupling Trickling Filter or RBC’s with Activated Sludge

Most coupled or combined processes use a fixed film reactor in series with a suspended growth reactor. In combined processes, the fixed film reactor usually consists of a biological tower. The suspended growth reactor is generally an aeration basin or small contact channel. Other types of combined processes have been used where rotating biological contactors (RBC’s), lagoons, or other treatment...

Modeling and Experimental Prediction of Wastewater Treatment Efficiency in Oil Refineries Using Activated Sludge Process

In this study, activated sludge process for wastewater treatment in a refinery was investigated. For such purpose, a laboratory scale rig was built. The effect of several parameters such as temperature, residence time, effect of Leca (filling-in percentage of the reactor by Leca) and UV radiation on COD removal efficiency were experimentally examined. Maximum COD removal efficiency was obtained...

Ammonia Wastewater Treatment by Immobilized Activated Sludge