A seeded BOD analysis was conducted on high-strength, food-processing wastewater. Twenty-milliliter portions were used in setting up the 300-ml bottles of aged, settled, wastewater seed. The seeded sample BOD bottles contained 1.0 ml of industrial waste and 2.0 ml of seed material. The results for this series of test bottles are listed in the following table. Calculate the BOD values. (B1 =8.2 mg/l, D1 = 8.2 mg/l, f = 0.10, P = 1/300.) Plot a BOD-time curve; what is the 5-day value? Determine the k-rate.
Time days) | Seed Tests B2 mg/I) | Sample Tests D2 mg/I) | Time days) | Seed Tests B2 mg/I) | Sample Tests D2 mg/I) |
0 | 8.2 | 8.2 | 7.9 | 4.5 | 4.1 |
1.0 | 7.3 | 7.2 | 9.8 | 4.1 | 3.8 |
1.9 | 6.5 | 6.4 | 11.8 | 3.9 | 3.5 |
2.9 | 5.9 | 5.8 | 14.0 | 3.4 | 2.9 |
3.8 | 6.6 | 5.3 | 15.6 | 3.6 | 2.7 |
4.7 | 5.1 | 5.0 | 19.0 | 3.8 | 2.1 |
6.0 | 4.8 | 4.6 |
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