I have known the formula to calculate the TOLR (kgCOD/lit/year) is =
[(COD mg/lit) x (Volume m3/ year) x (1000lit)]x 10-6 .
Is it correct?
Dear Sugirtharan Muthucumaran,
Generally the TOLR units are expressed in KgCOD/m3/day.
For more details, please see the following link:
https://www.google.ps/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjWnvG_ypTMAhXLuBQKHYmMB4MQIAgiMAE&url=http%3A%2F%2Fwebcache.googleusercontent.com%2Fsearch%3Fq%3Dcache%3AV98iQxhxFbUJ%3Awww.mdpi.com%2F1996-1073%2F7%2F2%2F736%2Fpdf%2B%26cd%3D2%26hl%3Den%26ct%3Dclnk%26gl%3Dps&usg=AFQjCNEToHCaWFGRYKavj5KZJd-dm-Z0Bg&sig2=lwLn2N99l5ZknqsL8ruZvw
Hoping this will be helpful,
Rafik
Dear Sugirtharan,
Usually you multiply the COD concentration (mg/L) with the flow rate (m3/d). This gives you the kg COD/d (be careful with the units). If you know the surface area (m2) of your system you can also further divide with it, so you get kg COD/m2/d.
Its not correct. The formula you have given, shows kgCOD/Year and not kgCOD/lit/Year.
The loading rate is the COD load divided by the reactor volume, but sometimes is referred as volumetric loading rate kg/m3*d. The formula is TCOD(kg/m3)*Q(m3/d)/V(m3)= TCOD load(kg/d)/V(m3)= result (kg/m3*d)
The TOLR can also be calculated by dividing the COD of the affluent (mg/l or kg/m3) by the hydraulic detention time of reactor (HDT in hour, day, month, year).
The areal organic loading for the pond expressed as kg BOD/ha.d will depend on the least incidence of sunlight that can be expected at a particular place and also on the percentage of influent BOD that would have to be satisfied aerobically. The Bureau of Indian Standards has related the permissible loading to the latitude of the pond location to aerobically stabilize the organic matter and keep the pond odour free. The values are applicable to towns at sea levels and where sky is clear for nearly 75% of the days in a year. The values may be modified for elevations above sea level by dividing by a factor (1 + 0.003 EL) where EL is the elevation of the pond site above MSL in hundred meters.
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