Laserfiche WebLink
Nitrate Mass Balance Calculation, 36 AC Parcel 1 <br /> Data Input: <br /> Effluent Quantity(Q): 808 gals/day Concentration Rain(Nb): 1.00 mg/L-N <br /> Effluent Stream(N,H): 60.00 mg/L-N Denitrification (d): 15:0% <br /> Site Area(A): 36.00 Acres Deep Perc. of Rain (R): 3.30 inlyr <br /> Waste Loading (W): 0.30 inlyr <br /> Result: <br /> Mass Balance(N.): 5.2 mg/L-N <br /> MCL Drinking Water Nitrate as N: 10.0 mg/L-N <br /> yy Percent of MCL Nitrate as N 52% <br /> p <br /> Equations: <br /> Fj (VV) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find <br /> ` yr day 7.48 gal 1 year 43,560 ft2 1 ft (A)acre <br /> 0.3 in/yr(site) =808 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(9 acre 143,560 sq-ft)x(12 in/l ft)x(1 site/36 acres) <br /> F N - WN-(I-d)+RN, Nantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 5.19 mg/t_-N=((0.3 inlyr x 60 mglL-N x(1-0.15))+(3.3 in/yr x 1mg/L-1V))/(0.3 inlyr+3.3 inlyr) <br /> Variables: <br /> Nc=Average nitrate-N concentration (mgll)of combined effluent and rainfall percolate(5.19 mg/L-N). <br /> L_1 W=Uniform waste water loading for study area(in/yr) (0.3 inches/year). <br /> Nw=Total nitrate-N concentration of waste water percolate (60 mg/L-N). <br /> a d=Fraction of nitrate-N loss due to denitrification in the soil (15%). <br /> R= Uniform deep percolation of rainfall (3.3 in/yr). <br /> !!! ' Nb= Background nitrate-N concentration of rainfall (1 mg/L-N). <br /> Assumptions: <br /> r 1. Total nitrogen concentration of waste stream based on estimate of 60 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 15%. <br /> 3. Estimated deep percolation of rainfall is 3.3 inlyr, see deep percolation of rain worksheet. <br /> F4 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> Fl� <br /> I <br /> F! <br /> NEIL O. ANDERSON <br /> AN D ASSOCIATES <br /> i <br /> Plate 11 <br /> i <br /> Fi <br /> i <br /> I <br />