Recycle ratios are typically between 1 and 20 with the total particulate flow through the boiler limited to between 2 and 3 times the fly ash flow.
What is a good recycle ratio?
The profit per barrel is known as “netback” whereas the cost of finding and developing it is known as “F&D” or “FD&A” when costs of acquisition are added. The recycle ratio for an energy company should be at 1x or above for it to remain in business.
What is recycle ratio in wastewater treatment?
recycle ratio (R (%)) is defined as the ratio between the recycle flow rate to the aeration tank influent flow rate.
How do you calculate recycling?
When we study recycle systems, we are often asked to calculate the recycle ratio. Usually, this is found by dividing the mass flow of the recycle stream by the mass flow of the “fresh feed” entering the system.
What is recycle ratio oil and gas?
RECYCLE RATIO is a key measure of profitability in the oil and gas industry. The ratio is calculated by dividing the profit per barrel of oil by the cost of finding and developing the barrel of oil.
What is sludge recycle ratio?
The sludge recycle ratios in the range from 0.3 to 1 were consi- dered. … It was observed that at HRT of 16 h and the sludge recycle ratio of 0.85, the COD removal and SVI were 95 and 85 %, respectively. The sludge recycle ratio greater than 0.85 had no significant effect on the COD removal.
What is recycle reactor?
Recycle reactors are used when the reaction is autocatalytic, or when it is necessary to maintain nearly isothermal operation of the reactor or to promote a certain selectivity (see Section 5.6. … We shall define the recycle parameter R as the moles recycled per mole of product removed at point Q.
What is sludge recycle?
Sludge is usually treated before disposal or recycling in order to reduce its water content, its fermentation propensity or the presence of pathogens. Several treatment processes exist, such as thickening, dewatering, stabilisation and disinfection, and thermal drying. The sludge may undergo one or several treatments.
What is the optimum F M ratio for a completely mixed activated sludge treatment plant?
The optimal range for the F:M ratio in a complete mix system is 0.2 to 0.6 lb BOD/lb MLVSS (kg BOD/kg MLVSS). The first 69 days of data are interesting because of the amount of variability shown in the F:M ratio. The graph indicates the activated sludge process is not in control during this period.
How do you calculate sludge wasting?
The equations used are as follows:
- Qr = (X – Xo)/(Xw – X)
- Qw = (8.34*V*X)/(8.34*SRT*Xw)
- VMG = V*7.48/1,000,000.
- F:M = (8.34*So*Qo)/(8.34*%Vol*X*VMG)
What is the difference between recycle and bypass?
Recycle stream is a term denoting a process stream that returns material from downstream of a process unit back to the process unit. Bypass stream is a stream that skips one or more stages of the process and goes directly to another downstream stage.
What is recycle and purge?
Recycle and purge streams are an extension of splitter streams, whereby one of the product streams from the splitter is routed back into a previous process as a recycle stream and one is directed out of the process as a purge stream.
How many recycle streams are in the figure?
How many recycle streams are there in the following process? Explanation: There are two recycle streams, one from top reactor to left most reactor and other from right most to left most.