摘要:
为实现含油废水高效处理与工业废催化剂有效利用,从石油污染土壤中筛选出两株石油烃高效降解菌株,并利用海藻酸钠(SA)/聚乙烯醇(PVA)将其与催化裂化(FCC)废催化剂耦合制备固定化复合微球,考察其对含油废水的去除效果。结果表明,两株石油降解菌均为巴氏窄养单胞菌(Stenotrophomonas pavanii),复合微球具有良好的机械强度和传质性能。在微球投加量20 g/L、温度37 ℃、pH=7条件下培养3 d后,FCC/微生物固定化复合微球对模拟含油废水中石油烃降解率达到最高(74.06%)。该复合微球在处理实际含油废水时,对石油烃的去除率也高达73%。相较于游离态细菌,工业废催化剂与石油降解菌耦合形成的固定化复合微球在石油烃降解效能及系统稳定性上展现出显著优势,这一提升主要归因于FCC废催化剂的独特多级孔结构,以及其表面高价金属对生物降解过程的强效促进作用。
关键词:
石油烃降解菌,
工业废催化剂,
微生物固定化,
强化生物降解
Abstract:
To achieve efficient treatment of oil-containing wastewater and effective use of industrial waste catalysts, two strains of highly efficient petroleum-degrading bacteria were screened from petroleum-contaminated soil. These bacteria were coupled with the spent catalysts from fluid catalytic cracking(FCC) to prepare immobilized composite microspheres by using sodium alginate(SA)/polyvinyl alcohol(PVA), and the removal effects on petroleum pollutants were investigated. The results showed that both strains of petroleum degrading bacteria were Stenotrophomonas pavanii, and the composite microspheres had good mechanical strength and mass transfer properties. After culturing for 3 days under the conditions of microsphere dosage of 20 g/L, temperature of 37 ℃, and pH of 7, the FCC/microbial immobilized composite microspheres achieved the highest degradation rate of petroleum hydrocarbons in simulated oily wastewater (74.06%). Furthermore, the composite microspheres also achieved a removal rate of up to 73% for petroleum hydrocarbons when treating actual oily wastewater. Compared to free bacteria, the immobilized microspheres formed by the coupling of industrial waste catalysts and petroleum degrading bacteria showed significant advantages in the degradation efficiency of petroleum hydrocarbons and the system stability, which was mainly attributed to the unique multi-stage pore structure of the FCC spent catalysts, as well as the potent facilitation effect of high-valent metals on the surface of the FCC spent catalysts to promote the biodegradation process.
Key words:
petroleum hydrocarbon degrading bacteria,
industrial spent catalysts,
microbial immobilization,
enhanced biodegradation
中图分类号:
李倩玮, 张苗, 韦标, 杨晨璐, 王雨芊. 工业废催化剂耦合固定化石油降解菌微球高效处理含油废水[J]. 工业水处理, 2025, 45(9): 87-94.
Qianwei LI, Miao ZHANG, Biao WEI, Chenlu YANG, Yuqian WANG. Efficient treatment of oily wastewater by immobilized petroleum degrading bacteria microspheres coupled with industrial waste catalysts[J]. Industrial Water Treatment, 2025, 45(9): 87-94.