The invention relates to a treatment method for
reverse osmosis concentrated water. Aiming at
reverse osmosis concentrated water generated by a
reverse osmosis process of a double-membrane process, the method comprises: firstly removing organic matters and scaling ions such as
calcium,
magnesium and the like in the reverse
osmosis concentrated water by using a
nanofiltration membrane, then feeding the nanfiltration contributing water into the reverse
osmosis system to be further concentrated, and then feeding the concentrated nanfiltration contributing water into a
membrane distillation system for treatment and recycling; and adding alkali into the concentrated water generated by the nanfiltration
system to remove scaling ions such as
calcium,
magnesium and the like and part of organic matters and adsorbing the substances through powdery
active carbon to
discharge the up-to-standard concentrated water. According to the treatment method for reverse
osmosis concentrated water provided by the invention, the organic matters and scaling ions such as
calcium,
magnesium and the like which cause
pollution to a subsequent reverse osmosis membrane are removed by virtue of a
nanofiltration technology firstly, so that the stable operation of the reverse osmosis system is ensured; then the
nanofiltration contributing water is further concentrated by virtue of the reverse osmosis system, so that the water inflow of
membrane distillation is greatly reduced, the
recovery rate of the reverse osmosis concentrated water is improved, and the treatment cost for the reverse osmosis concentrated water is lowered. The treatment method has good economical and
social benefits.