▎ 摘　　要

NOVELTY - Preparing modified composite graphene aerogel involves mixing ultrasonically carbon nanotube with acidic dispersion medium, heating under reflux, collecting precipitate, washing, filtering until the pH of the filtrate is 6.5-7.5, drying carboxylated carbon nanotube, mixing uniformly graphene oxide, the reducing agent and the obtained carboxylated carbon nanotube by ultrasonic in a solution with a pH of 8-10, performing hydrothermal reaction to obtain modified composite graphene hydrogel, and drying the obtained modified composite graphene hydrogel to obtained modified composite graphene aerogel. USE - Method for preparing modified composite graphene aerogel used for strengthening anaerobic biological treatment of wastewater containing organic matter (claimed). ADVANTAGE - The prepared modified composite graphene aerogel has complete appearance, compact structure, low density and high specific surface area, and exists in a blocky form in the process of treating organic wastewater by anaerobic organisms, and has avoided loss, and improved stability of reaction operation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a modified composite graphene aerogel obtained by the preparation method; and 2. an application method of modified composite graphene aerogel for strengthening anaerobic biological treatment of wastewater containing organic matter, which involves: mixing the anaerobic sludge and modified composite graphene aerogel, passing the wastewater to be treated into the wastewater for biological treatment, where the biological treatment requires a constant temperature, the temperature of the constant temperature is 30-38degrees Celsius, the anaerobic environment needs to be constructed during the biological treatment, and the biological treatment needs to be protected from light.