A BOD analysis was performed on a municipal wastewater. The 300 mL test bottle was filled with 2.0% wastewater mixed with dillution water, The initial dissolved oxygen (DO) was 8.3 mg/L. The sample is then put in a incubator and set at 20°C. Since the 5th day falls on public holiday, the final DO does not get measured until the 7th day. The final DO is measured at 4.5 mg/L. Assuming k30 (base e) is 0.2/day, determine the BOD3 @ 20°C BOD5 @ 30°C

Q: 4. Wastewater sample was prepared and incubated at 20°C for 5 days for BOD analysis. Sample volume…

A:

Q: A BOD test is to be run on a sample of wastewater that has a five-day BOD of 195 mg/L. If the…

A: Given, BOD5 = 195 mg/L DOi = 9 mg/L Vb = 300 ml

Biological Processes

Biological solid waste includes bacterial and contaminated waste produced by living individuals. Its treatment is essential to prevent the spread of any air-borne or water-borne diseases or diseases transmitted from one organism to another in a food chain. There are many benefits of the biological solid waste treatment and some of them are: the minimized quantity of waste substance, waste control, eradicating any disease-causing pathogens, generation of biogas, composting, anaerobic digestion, bio drying, mechanical biological treatment, microbial fuel cell, phytoremediation, and biofiltration. The final products of the biological solid waste treatment may be recycled to obtain organic fertilizers or disposed of in SWDS (Solid Waste Disposal Site) after proper treatment.