1 vsc = vsp + vic -voc

where vsc = volume in equalization basin at the end of current time periodvsp = volume in equalization basin at the end of preivious time periodvic = volume of inflow during the current time periodvoc = volume of outflow during the current time period

NOTICE THAT THERE IS KINK AT 8 AM , SO AT THIS TIME BASIN IS EMPTY

time periodM--1 298.1175567 1073.223 1073.223 150 160.9835 1200 126.77681--2 239.7233961 863.0042 1936.227 115 222.6662 2400 463.77262--3 178.2558586 641.7211 2577.949 75 193.3461 3600 1022.0513--4 141.3753362 508.9512 3086.9 50 154.345 4800 1713.14--5 113.7149443 409.3738 3496.274 45 157.3323 6000 2503.7265--6 107.5681905 387.2455 3883.519 60 233.0111 7200 3316.4816--7 129.0818287 464.6946 4348.214 90 391.3392 8400 4051.7867--8 221.2831348 796.6193 5144.833 130 668.8283 9600 4455.1678--9 384.1721091 1383.02 6527.852 175 1142.374 10800 4272.1489--10 445.6396466 1604.303 8132.155 200 1626.431 12000 3867.84510--11 461.0065309 1659.624 9791.779 215 2105.232 13200 3408.22111--N 467.1532847 1681.752 11473.53 220 2524.177 14400 2926.469N--1 461.0065309 1659.624 13133.15 220 2889.294 15600 2466.8461--2 439.4928928 1582.174 14715.33 210 3090.219 16800 2084.6722--3 417.9792547 1504.725 16220.05 200 3244.011 18000 1779.9463--4 381.0987322 1371.955 17592.01 190 3342.482 19200 1607.9914--5 353.4383404 1272.378 18864.39 180 3395.59 20400 1535.6135--6 353.4383404 1272.378 20136.77 170 3423.25 21600 1463.2356--7 356.5117172 1283.442 21420.21 175 3748.536 22800 1379.7937--8 396.4656166 1427.276 22847.48 210 4797.972 24000 1152.5168--9 433.3461391 1560.046 24407.53 280 6834.108 25200 792.47029--10 433.3461391 1560.046 25967.58 305 7920.111 26400 432.424110--11 411.832501 1482.597 27450.17 245 6725.292 27600 149.827111--M 374.9519785 1349.827 28800 180 5184 28800 0

Avg. flow rate(10^(-3) m^3/s)

flow in period

cumulat -ive flow

BOD (mg/l)

BOD (kg)

AVG OUT FLOW

VOLUME OF BASIN

TOTAL WASTE WATER IS 28800 NOTICE THAT MAXIMUM VOLUME AVG FLOW = 28800/12 =1200 OF THE BASIN IS OBTAINED JUST BEFORE

8AM

CALCULATION OF EQUALIZED FLOW

VIC VOC VSP VSC8--9 1383.019593 1200 0 183.01969--10 1604.302728 1200 183.0196 587.322310--11 1659.623511 1200 587.3223 1046.946

11--N 1681.751825 1200 1046.946 1528.698 CALCULATION OFN--1 1659.623511 1200 1528.698 1988.321 EQUALIZES BOD -1--2 1582.174414 1200 1988.321 2370.496

2--3 1504.725317 1200 2370.496 2675.221

3--4 1371.955436 1200 2675.221 2847.176

4--5 1272.378025 1200 2847.176 2919.554

5--6 1272.378025 1200 2919.554 2991.932

6--7 1283.442182 1200 2991.932 3075.375

7--8 1427.27622 1200 3075.375 3302.651

8--9 1560.046101 1200 3302.651 3662.697

9--10 1560.046101 1200 3662.697 4022.743

10--11 1482.597003 1200 4022.743 4305.34

11--M 1349.827123 1200 4305.34 4455.167

M--1 1073.223204 1200 4455.167 4328.39

1--2 863.0042259 1200 4328.39 3991.395

2--3 641.721091 1200 3991.395 3433.116

3--4 508.9512101 1200 3433.116 2742.067

4--5 409.3737995 1200 2742.067 1951.441

5--6 387.245486 1200 1951.441 1138.6866--7 464.6945832 1200 1138.686 403.3807

TIME PERIOD

7--8 796.6192854 1200 403.3807 -7.73E-12

2 xoc = {(vic)(xic) + (vsp)(xsp) } /{vic + vsp}

where xoc = average concentration of BOD in the outflow from the storage basin during the current time period(mg/l)vic = volume of the wastewater inflow during the current period xic = average concentration of BOD in the inflow wastewater volume vsp = volume of wastewater in storage basin at the end of the previous time period xsp = concentration of BOD in wastewater in storage basin at the end of the previous time period

NOTICE THAT THERE IS KINK AT 8 AM , SO AT THIS TIME BASIN IS EMPTY

175 175 242.0284200 197.44 316.7536215 211.0792 350.312

220 218.0816 366.7591

220 220 365.1172

210 215.5688 341.0674

200 206.1171 310.1496

190 196.6101 269.7403

180 186.9114 237.8219

170 176.9647 225.166

175 171.501 220.1116

210 186.0945 265.6083

280 232.4573 362.6442

305 287.4676 448.4626

245 288.8419 428.2361

180 229.4852 309.7654

150 174.1761 186.9299

115 144.1817 124.4294

75 109.4597 70.2426

50 71.77231 36.5286

45 49.3505 20.2028

60 47.48374 18.3878690 68.69465 31.92203

BOD (mg/L)

EQUAL- ZED BOD (mg/l)

EQUALIZED BOD IN PERIOD

130 116.554 92.84915

xoc = average concentration of BOD in the outflow from the storage basin during the current time period(mg/l)

xsp = concentration of BOD in wastewater in storage basin at the end of the previous time period