METHOD AND APPARATUS FOR TREATING AMINE-CONTAINING WASTEWATER

PROBLEM TO BE SOLVED: To provide a method for treating amine-containing wastewater capable of obtaining a treated water with less residual amine, while suppressing thermal energy required for evaporation concentration in treating an amine-containing wastewater by an evaporation concentration method.SOLUTION: There is provided a method for treating an amine-containing wastewater, including: a first reverse osmosis membrane treatment process in which amine-containing wastewater having pH of 9 or more is passed through a reverse osmosis membrane of a first reverse osmosis membrane module 12, which is then separated into first permeated water and first concentrated water; a second reverse osmosis membrane treatment process in which the first permeated water is passed through a reverse osmosis membrane of a second reverse osmosis membrane module 14, which is then separated into a second permeated water and a second concentrated water; and an evaporation concentration process in which the first concentrated water is evaporated and concentrated by an evaporation concentrator 16.SELECTED DRAWING: Figure 1 【課題】蒸発濃縮法によるアミン含有排水の処理において、蒸発濃縮に掛かる熱エネルギーを抑えながら、残留アミンの少ない処理水を得ることができるアミン含有排水の処理方法を提供する。【解決手段】ｐＨ９以上のアミン含有排水を、第１逆浸透膜モジュール１２の逆浸透膜に通水し、第１透過水と第１濃縮水とに分離する第１逆浸透膜処理工程と、前記第１透過水を、第２逆浸透膜モジュール１４の逆浸透膜に通水し、第２透過水と第２濃縮水とに分離する第２逆浸透膜処理工程と、前記第１濃縮水を蒸発濃縮機１６により蒸発濃縮する蒸発濃縮工程と、を有するアミン含有排水の処理方法である。【選択図】図１