To take ion exchange process regenerating waste alkali liquor (pH > 13.5, about 5% alkali, a large number of the colloid, protein, suspended solids included) as an example, to design the treatment capacity as 1600 t/d, 5 groups (each has 48 pieces)of braced tubular membrane modules (model:KMTC-0512-SD) are adopted. After treatment, recyclable NaOH in waste alkali liquid reaches 90%. Operation flux is 60 ~ 100 LMH and system power is 310 kw, and power consumption of equipment costs 1.86 million yuan/year.