Laserfiche WebLink
'-Nitrate Mass Balance Calculation <br /> Data Input: <br /> Effluent Quantity(Q): 1,045 gals/day Concentration Rain(N j 1.00 mg/L-N <br /> Effluent Stream(N,): 71.00 mg1L-N Denitrification(d): 25.0% <br /> Site Area(A): 1200Acres Deep Perc. of Rain(R): 5.87in/yr <br /> Waste Loading(W): 1.17in/yr <br /> Result: <br /> Mass Balance(N J: 9.7 mg/L-N <br /> t. MCL Drinking Water Nitrate as N: 10.0 mg1L-N <br /> Percent of MCL Nitrate as N 97% <br /> `, Equations: <br /> (W) in = (Q) gal x 1 ft3 x 365 day x 1 acre x 12 in x 1 Find <br /> L. yr day 7.48 gal 1 year 43,560 ft 2 1 it (A)acre <br /> 1.17 in/yr(site) =1,045 gal/day x(1 cu-ft/7.48 gals)x(365 days/1 year)x(1 acre 143,560 sq-ft)x(12 in/1 ft)x(1 site/12 acres) <br /> ` N�= WN-0-d)+RN,, Hantzsche-Fennemore Equation(Nc) <br /> W+R <br /> 9.69 m91L-N=((1.17 in/yr x 71 mg4,-N x(1-0.25))+(5.87 in/yr x 1 mg/L-N))/(1.17 in/yr+5.87 ir✓yr) <br /> Variables: <br /> Nc=Average nitrate-N concentration(mgfl)of combined effluent and rainfall percolate(9.69 mg/L-N). <br /> W=Uniform waste water loading for study area(in/yr)(1.17 incheslyear). <br /> Nw=Total nitrate-N concentration of waste water percolate (71 mg/L-N). <br /> d=Fraction of nitrate-N loss due to denitrification in the soil(25%). <br /> R=Uniform deep percolation of rainfall(5.87 in/yr). <br /> Nb=Background nitrate-N concentration of rainfall (1 mg/L-N). <br /> Assumptions: <br /> 1. Total nitrogen concentration of waste stream based on estimate of 71 mg/L-N. <br /> 2. Fraction of nitrate-N loss due to denitrification in the soil is assumed to be 25%. <br /> 3. Estimated deep percolation of rainfall is 5.87 in/yr,see deep percolation of rain worksheet. <br /> 4. Assume background nitrate-N concentration of rainfall is 1 mg/L-N. <br /> r <br /> NEIL O. ANDERSON <br /> AN D ASSOCIATES <br /> Plate 1 <br />