Environmental science and energy resources question and answer

1. Environmental Science (Assignment II)
---ARGHYADEEP SAHA
BSc (Hons.) Geography (SEM-II)
Roll No: - UG/05/BSGEO/2019/017
1
11-06-2020 16:04:09
2. Explain the importance of the following operations in BOD test
 pH adjustment.
 Seeding wastewater.
 Incubation at controlled temperature.
pH adjustment - As a chemical component of the wastewater, pH has direct influence on wastewater
treatability — regardless of whether treatment is physical/chemical or biological. Because it is such a
critical component of the makeup of the wastewater, it is therefore critically important to treatment.
Seeding wastewater - If BOD/COD ratio is between 0.3 and 0.6, then seeding is required to treat it
biologically.
Incubation at controlled temperature - BOD Incubator (Bio-Oxygen Demand) are used to maintain
temperature for test tissue culture growth, storage of bacterial cultures and incubation where high
degree of constant temperature accuracy is required.