Dear  Ali Farahmand,   ...

Dear  Ali Farahmand,

There are many ways to treat it including extensive and intensive treatment.

If you have enough area you can treat it in a sequence of lagoons (that can include from anaerobic to facultative, and others and wastewater returns).

If you have no enough area, but you have highly skilled personal employees, you could use any anaerobic biological wastewater systems (UASB,  EGSB, CSTR, others or whatever modification or hybrid between them), and some aerobic system at the final to reduce more if it is needed. You will need local skilled personal )or even remote control in this case because the anaerobic treatments have delicate balances that need highly experence operators.

Other suggestion is that you can use a simple aerated lagoons system enhanced by a biocleaner system that has a good performance and really simple operation and digest the sludge in the same lagoons.

Whatever case it will be better that you install one or some pilot systems to confirm the performance or even to obtain data in a competition between them.

Regards,

Orlando D. Gutiérrez Coronado