An oxidation pond treats wastewater mainly through the combined activity of:
Correct answer: A. Bacteria and algae under natural conditions
- A. Bacteria and algae under natural conditions
- B. Coarse screens and mechanical compressors
- C. Chlorine and activated carbon particles
- D. Sand grains and pressure-driven membranes
Explanation
Oxidation ponds use bacteria to decompose organic matter, while algae provide oxygen through photosynthesis in the pond system. Screens, chlorine and membranes may serve other treatment functions but do not define this process.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Environmental Engineering
Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
Practise Environmental Engineering
80 free Environmental Engineering MCQs from Civil Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Civil Engineering questions like this
Civil Engineering is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Environmental Engineering questions
The sludge volume index in an activated sludge plant is primarily used to assess:
In a sanitary sewer, infiltration refers to the entry of:
Granular activated carbon is most commonly used in water treatment to reduce:
The principal advantage of incineration for municipal solid waste is that it:
Excessive discharge of nitrogen and phosphorus into a lake most directly promotes:
Which example is a primary air pollutant?