How to calculate the Daily sludge production of a wastewater treatment plant?
The daily sludge production is: PX,T,VSS= kg VSS/d PX,T,TSS= kg TSS/ [ Summary Related Calculations] [ Other Calculators] [ Converters] Documentation These formula will establish the daily sludge production of an sewer wastewater treatment plant: Where: Q= influent flowrate [m3/d] Y= biomass yield [g VSS/g COD used] S0=
How do you remove sludge from wastewater treatment plants?
Wastewater Sludge Removal Options. There are various options for treating sludge including stabilization, thickening, dewatering, drying, and incineration. The costs for treating sludge and removing sludge from wastewater are roughly the same. Typically a polymer chemical is used for the volume reduction process known as dewatering.
What are the most common methods of sludge treatment?
As one of the most common methods of sludge treatment, the random dumping and landfill of industrial sludge has caused great harm.
Why is sludge treated before final disposal?
Two basic goals of treating sludge before final disposal are to reduce its volume and to stabilize the organic materials. Stabilized sludge does not have an offensive odour and can be handled without causing a nuisance or health hazard. Smaller sludge volume reduces the costs of pumping and storage.
How do you calculate sludge removed?
Calculation : The daily sludge mass produced = ( 100,000 ) ( 0.080 ) = 8,000 kg dry SS / day. Since 97 % MC is 3 % SC or approximately 30 kg dry SS / m 3 sludge, the daily volume produced is 8,000 / 30 = 267 m 3 .
How do you calculate sludge?
Sludge volume index ( SVI ) is calculated by dividing the settleability by the MLSS concentration. The SVI is always expressed in mL/g.
How do you calculate sludge loading?
Hydraulic Loading = ( GPM x 1,440 min/day ) Rate, GPD/Sq. Ft. ( Surface Area, sq. ft. )
How do you calculate sludge return?
The SVI is computed by dividing the result of the settling test in ml/liter by the MLSS concentration in mg/L in the aeration tank times 1,000. The common range for an SVI at a conventional activated sludge plant should be between 50 and 150. Optimum SVI must be determined for each experimentally.
How is sludge concentration measured?
How to calculate the SVI?Take a sample from the aeration tank. ... Let the sample settle for 30 minutes before analysis begins.Analyze the sample and find out the concentration of suspended solids. ... Divide the wet volume of the settled sludge (represented in mL/L) by the MLSS value from the last step.More items...•
How do you calculate percentage of solid in sludge?
Divide the mass of solids by the total mass of the solution, and then multiply the result by 100 to calculate the percentage of solids by weight. In this example, (17/167) * 100 = 10.18 percent.
How do you calculate removal efficiency?
We have a formula that says efficiency or removal efficiency equals what's coming in minus what's coming out then you divide that by what's coming in and then we multiply by a 100 to convert the decimal to a percent.
How is wastewater treatment plant capacity calculated?
SIZE OF SEWAGE TREATMENT PLANT / CAPACITY OF SEWAGE TREATMENT PLANT (STP)Total domestic (raw) water demand = TWD.Estimated Sewage X = 90 % of TWD.Estimate Sewerage X = 90/100 * TWD For Eg If TWD = 1500 KLD.Capacity of S.T.P = 90 / 100 * 1500 KLD = 1350 KLD.More items...•
How do you calculate mass 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.
How do you calculate sludge retention time?
The solids retention time (SRT) is the time the solid fraction of the wastewater spends in a treatment unit. It is the quantity of solids maintained in the reactor divided by the quantity of solids coming out of the reactor each day: SRT = V *Cd / Qout* Cout.
How do you calculate return activated sludge flow rate?
The second approach to determine the best return activated sludge rate is by using the solids mass balance equation....How to Determine the Ideal Return Sludge Flow Rate (RAS)Measuring ParameterTypical value (mg/L)MLSS2000 – 3500MLVSS1500 – 2500SS (Suspended solid)6000 - 8000VSS (Volatile Suspended Solid)4500 – 6000
How do you calculate sludge age?
The sludge age of an activated sludge process can be calculated by dividing the pounds of suspended solids or MLSS in the aeration tanks by the pounds of suspended solids that enter the aeration tanks (Equation I.