1 Usage of water, 5 Biological wastewater treatment
It comes from the waste water load to the waste water treatment now. First, we will have a look at biological tretment methods. Biological treatment is the most important application. Municipal sewage treatment plants are working with this principle.
Who is doing the job in biological wastewater treatment?
plants
the laundry staff with special agents
microorganisms
How do microorganisms do the wastewater treatment?
they eat the pollution
they destroy the pollution producing special chemicals
they convert the pollution with enzymes to gases
What is the main advantage of biological waste water treatment?
treatment plants are easy to build, no staff neccessary
it is the most cost-effective way for wastewater treatment
the appeareance is more beautiful and more "ecological correct" than other treatment plants
Could Phosphorous be removed by biological wastewater treatment?
yes - some mocroorganisms could build up a phosphorous-buffer
yes - some microorganisms could convert phosphorous into CH4
no
What does anaerobic treatment do that aerobic does not?
Less surplus sludge production
More surplus sludge production
No surplus sludge but the MO‘s need more aeration
What is the principle of biological treatment of persistant (badly biodegradable) substances?
The MO‘s have to wait for biodegradability to increase
The MO‘s convert the substances and separate C2
The MO‘s oxidize the badly biodegradable substances
What is the advantage of fixed bed reactor for biological wastewater treatment?
No surplus sludge production
No separation step is required
No wash out of the MO‘s is possible
What is the advantage of the rotating disk reactor?
No aeration is required
The MO‘s can see their environment
The MO‘s are less sensitive for toxic load
What could be the effect of adding chemicals like H2O2 or Ozone?