环境工程学报2024，Vol.18Issue(1)：22-31,10.DOI:10.12030/j.cjee.202307093
缓释氮源的固定化Rhodococcus sp.W7颗粒处理焦化废水
Treatment of coking wastewater by immobilized Rhodococcus sp.W7 particles with controlled release of nitrogen source
摘要
Abstract
In this study,the immobilized microorganisms coupling with controlled release of nitrogen source was used to improve the biodegradation efficiency of common immobilized microorganisms in nitrogen source deficient environment.Urea was used as the controlled release of nitrogen source.The mixed gel(containing urea)of polyvinyl alcohol and sodium alginate was first crosslinked in 3％CaCl2 saturated boric acid solution and then crosslinked in 0.5 mol L-1 sodium sulfate solution.The prepared immobilized microbial particles with controlled release of urea had an encapsulation efficiency of higher than 98％,swelling rate of 15％～25％and high mechanical strength.In nitrogen free environments,100 mg·L-1 phenol,pyridine or quinoline could be biodegraded by these particles within 4,8 and 12 hours,respectively.In the simulated coking wastewater with high C/N ratio,the mixture of 100 mg·L-1 phenol,10 mg·L-1 pyridine and 10 mg·L-1 quinoline could be degraded within 6 hours.Meanwhile,the nitrogen source provided by the urea in the immobilized microbial particles could meet the needs of the immobilized microorganisms to degrade 100 mg·L-1 phenol every day for 20 days.The above results show that the prepared immobilized microbial particles with controlled release of urea can be used to treat wastewater lack of nitrogen source and have a good application effect.关键词
缓释氮源/尿素/固定化微生物/生物降解Key words
controlled-release nitrogen sources/Urea/immobilized microorganism/biodegradation分类
资源环境引用本文复制引用
吴志国,孙静,孙炜,刘翙羽,左梓涵,闫慧娟,杨宗政..缓释氮源的固定化Rhodococcus sp.W7颗粒处理焦化废水[J].环境工程学报,2024,18(1):22-31,10.基金项目
国家自然科学基金青年资助项目(31400092) （31400092）
含氯有机物污染土壤修复技术的研发及应用(2023120021000787) （2023120021000787）
