Can the effluent of secondary treatment of pulp and paper plant be used for irrigation?

A free chlorine plant of pulp and paper will be installed near Orinoco River in Venezuela and the effluent has to be reused because it will not be discharged to the river. The expected concentration of BOD will be low but the COD will be around 800 mg/L and the real color will be dark too. The secondary treatment will be an activated sludge process selector type. Can this water be used for irrigation of fields? What are the risks?