Which measurable variables indicate the effectiveness of the treatment system and the initial combinations of the sewage?
Plus E.coli in the effluent and possibly chlorine residual.
For monitoring the activated sludge process, dissolved oxygen and mixed liquor suspended solids are the most important parameters.
In our federal state usually the following parameters are used for assessing sewage treatment plants:
Inflow: temperature, pH, BOD, COD/TOC, phosphorous, ammonium, nitrogen
Outflow: temperature, runoff volume, pH, BOD, phosphorous, ammonium, nitrogen
in addition there are several assessments of the effluent sludge, sludge liquor etc.
Dear Mophin!
If I may give a common advice I would say:
1. First consider your home legislation.
2. Then consider legislation and working practice of the states that you consider to have proper WW treatment practice and technologies that also you may implement in your own country (consider technology, work load, energy, construction and operation costs …).
3. Then investigate what kind of WW comes to your plant, e.g. if there is a lot of industry, it may bring toxic substances that will reduce the effect of biological treatment.
4. Make a good monitoring program at the input to your WWTP (and possibly also at the outlets of key industries into the sewerage) to control what comes to your plant and what may cause problems.
5. Measure the health of your WWTP through physico-chemical and microbiological analyses of the activated sludge - i.e. the "workers" at the WWTP.
Travel to other WWTP's and ask questions.
Regards Boris
Dear All, Thank you so much for your valuable additions for my question.
I may also suggest that you consider microbial population and type - bacteria, fungi and protozoa. Anaerobic, anoxic and aerobic conditions are important in process consideration.
Hi,
If your process is aerobic do you need control Alkalinity, pH, Suspended Solids, OD, BOD+COD or TOC, N (as NO3, NO2, NH3 & Organic), microbial population as correlate with the physico-chemical probes, for this test you need check on the microscope the microbial flora, if you desire check the coliform population; all of these probes are you need for evaluate the quality of your influent & efluent.
However you need verify the quality of sludge and for these you need the setteable solids, total solids and volumetric index of sludge.
Nice to hear from you all, thank you so much for your valuable additions