A disinfection contact basin is to be designed to provide sufficient contact time for 99% kill of E. coli for a water/wastewater flow of 1m”/s. A disinfection test shows that 99.9% kill of E. coli can be accomplished in 30 min at a chlorine dosage of 10 mg/L. Determine the required volume of the contact basin.

Q: Environmental Engine... ✓ The 500mL portions analysed using the membrane filter technique produce…

A: given- 500 mL portion samplecounts of coliforms per 100 mL-350, 370, 370 and 340

Q: Calculate how much additional aeration volume (expressed as a percentage) is required to upgrade a…

A:

Q: Based on test data given on picture attached, determine the concentration of total solids, TS in…

A: Given data, Weight of empty dish X 54.222 g Weight of dish+ residue after evaporation at 105° C…

Q: in a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of…

A:

Q: A complete mix activated sludge secondary treatment plant is wasting from the return sludge line.…

A: Solution: Given Data: Mean cell solids residence time Qc=5 daysV=1000 L=1 m3MLVSS Xt=2000 mg/LWaste…

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

Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.