▎ 摘　　要

NOVELTY - Processing technique of pulping and papermaking wastewater comprises (i) soaking graphene oxide microsphere in tetrahydrofuran, stirring, heating to reflux, using condensed water to control reaction temperature at 85-90°C, slowly dropping grafting agent and tetrabutylammonium bromide, stirring, reacting for 2-3 hours, refluxing, adding self-condensation monomer and p-toluenesulfonic acid, stirring and reacting for 4-7 hours, cooling to room temperature, filtering, washing the solid by ethanol, and drying to obtain settling agent; (ii) adding settling agent to biochemically treated pulping and papermaking wastewater, stirring for 15-30 minutes, allowing to stand, precipitating, and filtering; and (iii) adjusting the filtrate pH to 2-4, adding ferrous sulfate heptahydrate and hydrogen peroxide, stirring, reacting for 30-70 minutes under aeration condition, adjusting the solution pH to 8.5-9, allowing to stand, precipitating, and filtering to obtain discharged water. USE - Processing technique of pulping and papermaking wastewater, and for useful in sewage treatment. ADVANTAGE - The processing technique has excellent impurity removing effect, flocculating multiple sedimentation effect, reduced cost of subsequent oxidation treatment process, and reduced water COD chromium (CODCr) concentration and chromaticity.