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  • Users: BTJCM
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  1. BTJCM

    What do you do when you have a malicious plan checker?

    I have some minor issue with one of the environmental agencies for not accepting one of my annuals reports, and we pay to external(certified) company to make the reports, which was with the same content and after that i submit it to the authorities, they approve it, but in your case i'm not sure...
  2. BTJCM

    Dissolved organic carbon in sludge

    Hi bimr, The industry is for extrusion of aluminum and the average flow rate is between 4-5m3 per day. Best regards, George
  3. BTJCM

    Dissolved organic carbon in sludge

    Greetings, I have a problem with dissolved organic carbon(DOC) in sludge. I need to lower the concentration of dissolved organic carbon in sludge. The sludge is generated from the treatment of waste water. The entry waste water in waste water treatment plant(WWTP) is with the following...
  4. BTJCM

    Passing sludge through vertical precipitator

    Hi springrise, diameter = 2.25 m, height = 4 m. Best Regards, George
  5. BTJCM

    Passing sludge through vertical precipitator

    Hi springrise, thank you for you feedback there was some issue with the name of the file. I posted a link because for some reason even If I change the name doesn't work properly, but from the link it's working fine. Best Regards, George
  6. BTJCM

    Sulphates remouval problem

    Hi bimr, pH controller which we have control pH = 8. The controller regulate through electrode how much CO2 need to dose so we can have pH = 8 in our waste water. I can say CO2 neutralization its probably the most economical option that I have. Because the expense for CO2 for just 1 month is not...
  7. BTJCM

    Passing sludge through vertical precipitator

    Hi springrise, I will explain the entire process. The waste water first goes to tank(1), after that is going to mediators(2), where the waste water is aerated, because of the high pH the waste water is passing process of neutralization, where carbon dioxide(4) is dosed according to the...
  8. BTJCM

    Sulphates remouval problem

    Hi springrise, I will make detail explanation. I'm working in thread dyeing factory. The only think I can tell you about dyes is that they are organic, dispersive, and they are not classified as harmful, hazardous and so on. In the process of dying we are using NaOH(from where the high pH come...
  9. BTJCM

    Sulphates remouval problem

    Hi ashtree, when pH is higher more sulfides are formed, when is lower more sulfates are formed.
  10. BTJCM

    Sulphates remouval problem

    Hi bimr, I'm trying to reduce sulfates, from waste water. They are around 400-535 mg/l , I want to reduce them below 370 mg/l. My limit for sulfates are 400 mg/l. That's what I want to accomplish. There is no biological treatment in our ETP, there is only aeration, coagulation and precipitation...
  11. BTJCM

    Sulphates remouval problem

    Hi all, I make a lot of test with different type of coagulants, and the conclusion from all the experiments is that the coagulant(aluminum oxychloride) which we are using right now doesn't remove very well SO4 from the waste water, when we are using a little bit more than usual(which happen 1-3...
  12. BTJCM

    civil engineering in 1 min that will be useful for the entire career

    If you are not sure in something always check it. For example when your pH value is not with the expected value, search for the problems, always ask yourself a question when something isn't working fine, where is the problem. Always update your knowledge, you never know when something will be...
  13. BTJCM

    Connection between computer and monitor

    Thank you all for your responses. I bought expensive HDMI-VGA cable model Vivanco 45493 HDMI-VGA adapter for 21 euro, and I'm very content from the quality which this adapter provide. Best Regards, George
  14. BTJCM

    Connection between computer and monitor

    Hi all, sorry about my stupid question, but I have problem with my new pc which I bought 1 day ago. My monitor is VGA-VGA (male-male), my new pc have DVI and HDMI exit only, so I want to know what type of adapter I need to buy HDMI-VGA or VGA-HDMI. I think I need to buy HDMI to VGA, because my...
  15. BTJCM

    Passing sludge through vertical precipitator

    Hi ashtree, we tested CFS which I described in my last theme " How to dose coagulant ", and we will make a test with the polyaluminum oxychloride. The formed sludge due to the coagulant used is beginning to rise from the transfer of waste water to precipitator through perforated tubes. We do not...
  16. BTJCM

    Using two pipes of same diameter for a pumping pipeline.

    If you have only one pump the flow will stay the same(if you do not adjust the flow of the pump). If you are using two pipes with the same diameters, the velocity of the stream will fall down. You can check the formulas for the stream...
  17. BTJCM

    Passing sludge through vertical precipitator

    Hello, I have a problem with passing sludge through vertical precipitator. The formed sludge due to the coagulant used is beginning to rise from the transfer of waste water to precipitator(and that's not ok). I can't use filter press for the sludge. I think I need to use some kind of filters...
  18. BTJCM

    How to dose coagulant?

    Thank you for all your advices, but my boss take decision that we will use other coagulant MSDS(https://files.engineering.com/getfile.aspx?folder=1bd06d7a-fb44-48a3-9a7c-963d4df86425&file=cfsSheet.pdf), because it's more cheap. Ashtree, I wasn't able to find the original scheme of purification...
  19. BTJCM

    How to dose coagulant?

    Hi, here is a brief description of waste water treatment. Step 1: to reduce the temperature of the waste water goes through a heat exchanger until it reaches a temperature of about 40-45 degrees. Step 2: after the heat exchanger, the waste water enters the mediator, where the waste water is...
  20. BTJCM

    How to dose coagulant?

    Hi ashtree, parameters of the waste water are: ph is between 9.5-11.0, we are using CO2 for neutralize the ph environment. COD = 800-1200 mg/l, BOD5 = 200-600 mg/l, Suspended solids = 80.4 mg/l, SO4 = 300-600 mg/l, Sulphides = 0.2 mg/l, PO4 = 6.6 mg/l, P = 2.15a mg/l, Petroleum products = 1.51...

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