Rice washing water-activated sludge co-embedded ball for treating vanadium and phosphorus combined pollution

The invention discloses an embedding material taking chitosan as a main body, rice washing water is taken as a solvent, and activated sludge is embedded and fixed, so that cooperative treatment of vanadium and phosphorus combined pollution is realized. The preparation method comprises the following steps: adding chitosan and ferric chloride hexahydrate into rice washing water to obtain a mixed solution; adding activated sludge into the mixed solution, wherein the ratio of the activated sludge to the mixed solution is 1: 4; dropwise adding into an ammonia water solution for cross-linking, and washing and soaking with pure water to obtain immobilized embedded pellets; respectively adding the mixed solution into the vanadium and phosphorus combined pollution solution; placing in a 35 DEG C constant-temperature shaking table for 5 days, sampling every 12 hours, and measuring the content of vanadium and phosphorus pollutants. According to the invention, the purification of the embedded pellets on the vanadium and