Decentralized Aerobic and Anaerobic Treatment Facility

Our Client has very concentrated wastewater which includes related parameters as follows

pH: 8.12                                                                               

Total Suspended Solids:  6.960 mg/lt

Ammonia, Total (as N): 610 mg/lt

Nitrate and Nitrite as N: 8.9 mg/lt

Nitrate (as N): 8 mg/lt

Nitrite (as N): 4 mg/lt

Total Kjeldahl Nitrogen: 9.140 mg/lt

Phosphorus, Total: 292 mg/lt

BOD Carbonaceous: 4.590 mg/lt

The wastewater source is portable toilets. For that reason, the water contains very high concentration levels. 

I would like to combine an aerobic treatment system (activated sludge/rbc/decentralized treatment facility) with an anaerobic digestor technology and provide a solution for the customer.

What kind of solutions could be efficient? Note that I am open to other alternative treatment solutions, as well.