The invention discloses a treatment method of a
distillation extraction waste liquid in
fine chemical engineering production, which comprises the following steps: 1) microelectrolysis treatment: when
scrap iron and carbon particles are immersed in acidic
wastewater, uncountable micro primary cells can be formed in the
wastewater due to the polarization
potential difference between the iron and carbon, wherein the lower-potential iron becomes the
anode, and the higher-potential carbon becomes the
cathode; 2) advanced oxidation treatment: chemical oxidation is performed many times with
hydrogen peroxide under the action of a
circulating pump by using Fe<2+> as a catalyst; and 3) electric flotation treatment: the
wastewater enters electric flotation equipment, the electric flotation equipment generates
hydrogen by adopting a three-dimensional-like
electrode subjected to special treatment and a
cathode connected with the negative pole of a
direct current power supply, and the bubbles take the suspended substance in the
sewage onto the water surface to form a scum layer. The method integrates the microelectrolysis, chemical oxidation and electric flotation treatment, has the advantages of lower chemical consumption, simple after-treatment, small occupied area and high treatment capacity, and is convenient for management.