What is sludge loading rate?

What is sludge loading rate?

The sludge loading rate relates the daily wastewater load (kg BOD / d) and the available sludge mass. The design sludge loading rate is a value determined on the basis of a large number of large-scale measurement results.

What is integrated fixed film activated sludge?

Integrated fixed film activated sludge (IFAS) is a relatively new technology that describes any suspended growth system that incorporates an attached growth media within the suspended growth reactor (U.S. EPA 2010). Biofilm carriers are generally divided in ‘dispersed media’ or ‘fixed media’.

What is IFAS in wastewater treatment?

Integrated fixed film activated sludge (IFAS) systems add fixed or free floating media to an activated sludge basin to encourage the growth of biomass and enhance the treatment process. The attached biomass combines with the suspended concentration to achieve much greater total biomass.

What is the difference between IFAS and MBBR?

The term MBBR is the abbreviation of moving bed biofilm reactor, while IFAS stands for integrated fixed film activated sludge system. At a first glance, this seems to be a simple concept: a reaction tank is filled with a plastic-made carrier which is mixed in water or in a water/sludge mixture, respectively.

How is sludge loading rate calculated?

The biomass loading rate is now easily calculated by dividing the substrate fed per day by the total biomass weight in the aeration tank. As said, one of the main parameters set by the sludge loading rate is the treatment efficiency of the sewage treatment plant.

How is BOD loading rate calculated?

BOD (or COD) load: Units: kg/day The concentration of BOD (in mg/l) in the influent can be used to calculate the total BOD load per day being treated. This is simply done by multiplying the BOD in mg/l by the daily effluent volume in cubic metres (m3) and dividing the product by 1000.

What is suspended growth process?

Wastewater treatment processes in which the microorganisms and bacteria treating the wastes are suspended in the wastewater being treated. The wastes flow around and through the suspended growths. The various modes of the activated sludge process make use of suspended growth reactors.

What is activated sludge treatment process?

The activated sludge process is a means of treating both municipal and industrial wastewater. The activated sludge process is a multi-chamber reactor unit that uses highly concentrated microorganisms to degrade organics and remove nutrients from wastewater, producing quality effluent.

What is conventional activated sludge process?

The activated sludge process is a conventional biological process that is used for reduction of organic matter present in the wastewater. It basically involves the oxidation of carbonaceous biological matter, for reduction of the organic pollutants. This is a proven technology and can remove majority of organic matter.

What is Mbbr STP?

Moving bed biofilm reactor (MBBR) is a biological technology used for wastewater treatment process suitable for municipal and industrial application. MBBR offer an economical solution for wastewater treatment. STP MBBR technology is the use of a moving bed biofilm reactor in sewage treatment plants.

What is rate of loading?

Loading rate is the speed at which you apply forces to the body. The steeper slope (top graph) means that the forces applied to the runner occur quicker than that of the forces applied to the less steep slope (bottom).

How do you calculate loading rate?

Calculate the hydraulic loading rate with the formula: Hydraulic loading rate = Design flow (gal/day) / Area (feet ^2). Design flow is the volume of waste water per day. Calculate the organic loading with the formula: Organic matter = (BOD5 (mg/l) * 3.785 l/gal) / 453,600 mg/lb.

What is an integrated fixed-film activated sludge ( IFAS ) system?

What is an Integrated Fixed-film Activated Sludge (IFAS) system? An IFAS system involves the combination of a suspended biomass (activated sludge) and an attached biomass (biofilm) in the same reactor SET AS Fixed media IFAS system Ringlace IFAS system Examples of systems that are less used today MBBR IFAS system

How does fixed film activated sludge improve nitrification?

The fixed biomass increases the Sludge Retention Time (SRT), promoting better nitrification compared to simple suspended growth systems. During cold weather and where lower compliance limits are imposed, the added biomass improves the performance of nitrifying plants, or even allows non-nitrifying plants to nitrify.

How does IFAS increase the capacity of a sludge tank?

James Gellner, P.E. IFAS systems rely on attached biomass for added capacity in similar tank volumes. IFAS media can be plastic or fabric. Free floating media for IFAS systems are retained by submerged wedgewire screens, increasing the capacity of the activated sludge system.

What are the advantages of activated sludge treatment?

Activated Sludge has process flexibility and provides a high degree of treatment. Fixed Film processes are inherently stable and resistant to organic and hydraulic shock loadings. Placing Fixed Film media into Activated Sludge basins combines the advantages of both of these approaches.