Calculations for Wastewater Treatment

Dear All,

Currently, I am making calculations for wastewater treatment plant with following parameters:

Q = 19 m3/day

COD = 300.000 mg/l

PH = 11 - 12

The wastewater contained many pollutants such as: oils and fats, acid oil, caustics soda, etc.

Please refer some tip

Thanks and best regards

Taxonomy

• Reclaimed Wastewater
• COD Removal
• Industrial Wastewater Treatment
• Wastewater Treatment
• Water Treatment Solutions
• Water & Wastewater
• Wastewater Treatment Chemicals and Consulting

17 Answers

1. Dear All

   Thanks so much for your discussion enthusiasm. I can't answer for each your comments

   I am so sorry cause provided information is not enough.

   I have added more. please open the attachment file

   I need your help follow:

   1 . primary treatment: some tips for method to reduce COD content

   2. Biotechnology: I will use 4 main stages include: remove Oil and grease - DAF tank - UASB tank - MBBR tank. But I am encountering some problem in calculation for UASB and MBBR.

   I need more document to refer: choose inlet parameter as, formula etc

   ( if someone have designed this kind of wastewater, please discuss deeply in formula)

    

2. You haven't told us yet where you intend the effluent from your WWTW to discharge too and what consent levels you will have to achieve...

3. If there a lots of fats and oil in the waste-stream I would make sure that there is an oil separator early in the process flow - very early :-)

4. Hi,

   What is the process from which the used water is being generated?

   What at the Emission Limit Values that you need to achieve?

   What is the BOD5 concentration, the Total Nitrogen concentration, the Phosphorous concentration, in the used water as it arises?

   Are there any temperature issues that may need to be considered?

   Any other information on the process that generates the used water would be helpful.

   Kind regards

   Tom Keenan

    

5. Well.First of all what is BOD/COD ratio then we go for further treatment method and caluclation.It is permissible up to 4 times.We have check is it required caustic or oxydation treatment,Biological etc.I think your influent water is Jet fuel,brine of petro chemicals.

6. Dear Ho Ha

   What exactly in calculation do you want?

7. This sounds like a trick question - a COD of 300 000 mg/l must be almost pure blood or waste from an abattoir or tannery?  Reduce the pH by adding acid and put it into an anaerobic digester.  19 m3/day is not too much - you could consider an evaporation pond, but it is likely to cause very unpleasant odours. Please let us know what the waste is.

8. Dear Ho,

    

   It is an interesting project, but we will need more information.

   Please describe the process that genereates this wastewater and post a lab analysis including the BOD5, BOD20 and all the parameters that could help to find solution.

    

   Regards,

    

   Orlando D. Gutiérrez Coronado

    

9. Dear Ho'Ha

   With these levels and mixture of pollutants, especially COD and fats, oil... best way tor treat wastewater is an evapoxidation system: no problem with those pollutants, with basic pH, with high conductivity levels you obviously have, salts, metals...

   Please, refer to www.ambitechpro.com

10. Provide more info: TDS , COD , etc

     

11. Calculations to design a treatment plant depend on many factors such as:

    1. Source of wastewater domestic or Industrial, as you mention acid oils, caustic soda it looks Industrial source. If it is so then defining type of industry is highly essential.

    2. Influent & Treated Effluent Characteristics means what you are uploading in the plant & what you would like to achieve e.g. Secondary quality of effluent with BOD & TSS 30 mg/L or Tertiary quality i.e. both 10 mg/L level.

    3. Level of contamination in influent in terms of BOD, TSS, Oil/grease, Total Nitrogen, Total Phosphorus, Dissolved sulfide, odor emission etc.

    Therefore give us more details to help you in appropriate manner.

    1 Comment

    1. In addition to what Mamtaji told, we also need info on the end use for which the treated effluent is put to such as for agrixultuag, horticulture or for any induatey and the type industry to decide on the extent of treatment like secondary or tertiary etc.

12. You will need to provide more information on TDS, BOD of the waste (as well as metals) and what parameters you hope to achieve at the conclusion of treatment. The final parameters will dictate what steps you need to include and in what order. 

13. Once treatment has started maybe you need temporary storage, up to 250000L at a time? See www.damsak.co.za for more info

14. What are the COD levels you wish to achieve?  reducing pH will have no issues.

15. Good morning,

    Are you planning chemical or biological treatment?

16. Have you calculated the analysis of the expected wastewater and do you know what result you want and what you want to do with it after it has been treated?

    When do you think the plant will need the wastewater treated?

    With this info we can tell you if our equipement can do what you want, and when you have a sample of the wastewater, after we have anaysed it we will calabrate the equipment.

    For information on our equipment visit www.gictechs.com or email me at office@gictechs.com

17. Only 300 mg/l of COD ??

    FOG ??

    TDS ?.