Horse power rating46115 hp to fulfill the requirement of both mixing and O2 supply

Example 15

Design a trickling filter to treat 33,800 GPD of pharmaceutical wastewater using the empirical method of Ten States for the data given below:

1. Influent BOD5 of the raw wastewater, 5=6000 mg/L;

3. Depth of filter is restricted to 1.8 m.

Solution

(A) Determine the recirculation ratio required to give 90% efficiency:

(A) Determine the recirculation ratio required to give 90% efficiency:

(B) Determine the filter volume required by providing the maximum organic loading rate 1.2kg/m3 day:

V = [33,800 (GPD) x 3.785 (L/gal) x 0.9 x 6000 (mg/L)

(C) Determine the size of filter required Surface area reauired

(D) Hydraulic loading including the recirculation

(D) Hydraulic loading including the recirculation

Example 16

Design a UASB (upflow anaerobic sludge blanket) reactor for treatment of 435 m3/day of wastewater generated from a typical pharmaceutical plant. The COD removal efficiency of the reactor at HRT of 2 days and organic loading of 3.52 kg/m3 is 94%. Assume the following design data are applicable:

1. Influent COD=7000 mg/L;

2. Methane yield=0.35 m /kg COD removed;

3. Solubility of methane=0.028 m3/m3 effluent;

4. Biomass yield=0.027 mg/mg;

5. MLVSS of the sludge bed=70 kg/m3;

6. MLVSS of the sludge blanket=4 kg/m3;

8.Depth of the sludge blanket=3.5 m.

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