Hi Chris，To start up a new ...

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Hi Chris，

To start up a new activated WWTP, you don't have to seeding the SBR. However, it would take a relative long time (the difference of them might be 1 or 2 weeks) to get a stable operation. If you maintain a suitable operational condition, the growth speed of activated sludge is more than your expectation.

 

But you need to prepare sufficient antifoam reagent during a WWTP starting up period, which is used to control the foam generation no matter you have seeded it or not.

 

 

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Hi Laing. Thanks for your reply. The system is an existing system. As per the original question, it has been running for 3-4 years at a low pH of 4-5. I am a new employee to this remote site. An island 4000km from Australia. There is no other treatment plant that gives me the ability to reseed. The plant has  very poor settling characteristics. I am currently dosing NaOH to rectify pH. The PAC was getting watered down due to costs. I was asking for ideas on alternative reseeding 

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