Hello Thisara, First of ...

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Hello Thisara,

First of all, it will be good to know what you are expecting as a result, in terms of treatment efficiency. 

Second, if you want a really cheap system, you should use pH and oxygen levels to precipitate Fe3+ naturally. Then, you should also expect that other components will co-precipitate with it, reducing turbidity and Mn. 

If you want a cheap treatment and you have space for the treatment system, I would propose a 3 step treatment : 1° adding air and ajusting the water quality + 2° precipitation chamber + 3° nitrifying and biological stabilization.

If you like the idea, just send me an e-mail: xavier.gutierrez@nivachile.cl

PD: it is very important to know pH/T°, O2 and TOC content.