BOD

BIOLOGICAL TREATMENT OF DIFFICULT WASTES

T.P.SivanandanBOD, Waste Water Treatment, Water analysis, Water Quality Standard

Toxicity
Things that can cause toxicity include many of the following:
     Metals: lead, antimony, copper, zinc, chromium, cadmium, nickel, manganese
(permanganate), sliver,
    Oxidizers: chlorine, chloramines, any of the group VII compounds in the
periodic table, permanganates, ozone, fluorine, iodine, peroxides, and
so on.
             All of these compounds are direct toxins, because they directly interfere
with the biological [....]

Food-to-Microorganism Ratio(F/M Ratio)

T.P.Sivanandan7BOD, COD, Water analysis

Food-to-Microorganism ratio (F/M ratio)

The food-to-microorganism ratio (F/M ratio) is a process control method/calculation based upon maintaining a specified balance between available food materials (BOD or COD) in the aeration tank influent and the aeration tank mixed liquor volatile suspended solids (MLVSS) concentration The chemical oxygen demand test is sometimes used, because the results are available in a relatively short [....]

BOD/COD Loading on Aeration Process

T.P.Sivanandan1BOD, COD, Water analysis

Calculating BOD, COD, or SS loading on an aeration process

When calculating COD, BOD, or SS loading on an aeration process (or any other treatment process),loading on the process is usually calculated as lb/day. The following equation is used:
BOD, COD, or SS loading (lb/day) = mg/L x MGD x 8.34 lb/gal

Example:-

The BOD concentration of the wastewater [....]

Determination of Bio-Chemical Oxygen Demand (B.O.D)

T.P.Sivanandan1BOD

Apparatus:

* Incubator

* Stoppard Bottles

* Burette

* Pipette

* Conical flask

Chemicals: Reagents

* MnSO4 soln (364 gm MnSO4.H2O + 1 ltr boiling D.W.)

* CaCl2 soln. (27.5gm anhydrous CaCl2 + 1 Ltr D.W.)

* FeCl3 soln. (0.25gm FeCl3.6H2O + 1 Ltr D.W.)

* Phosphate Buffer [....]

Removal of COD, BOD: Ultrafiltration?

T.P.SivanandanBOD, COD

There is no possibility to reduce/remove COD & BOD Level by using Ultra Filtration (UF).

The Surface water Contain Less COD & BOD. But, In industrial Effluents,which will be higher Approximate 900 ppm and 350 ppm respectively(this is textile processing fig).

But you Can reduce these level by adopting Ozonator or U-V ray System, but the cost is High,moreover Some [....]