北京工业大学学报
北京工業大學學報
북경공업대학학보
JOURNAL OF BEIJING POLYTECHNIC UNIVERSITY
2015年
5期
755-762
,共8页
郝瑞霞%任晓克%孟成成%王建超%王润众%赵文莉
郝瑞霞%任曉剋%孟成成%王建超%王潤衆%趙文莉
학서하%임효극%맹성성%왕건초%왕윤음%조문리
电极生物膜%单质硫%耦合反硝化工艺%碳氮比%反硝化细菌
電極生物膜%單質硫%耦閤反硝化工藝%碳氮比%反硝化細菌
전겁생물막%단질류%우합반초화공예%탄담비%반초화세균
biofilm-electrode%elemental sulfur%coupled denitrification technology%ρ( C )/ρ( N )%denitrifying bacteria
为提高三维电极生物膜工艺脱氮效率,通过运行不同TOC与TN的质量浓度比(ρ( C)/ρ( N))条件下三维电极生物膜-硫自养耦合工艺(3BER-S),并建立基于反硝化特异性基因 nirS克隆文库,研究了ρ(C)/ρ(N)对3BER-S运行特性及反硝化细菌群落的影响。结果表明:ρ( C)/ρ( N)对3BER-S工艺的脱氮效率影响较小,不同ρ(C)/ρ(N)条件下的TN去除效率基本稳定在80%以上。ρ(C)/ρ(N)对3BER-S体系内的反硝化细菌种群结构和营养类型均有一定影响。高ρ(C)/ρ(N)条件下,反硝化细菌种类较少,Thauera(陶厄氏菌属)是体系内的优势菌群,脱氮作用以异养反硝化过程为主;当ρ( C)/ρ( N)降低时,反硝化细菌种类增多,硫自养反硝化细菌所占比例升高。总之,由于硫磺单质的加入,弥补了3BER工艺低ρ( C)/ρ( N)时的反硝化作用电子供体不足,使得3BER-S耦合体系在不同ρ( C)/ρ( N)条件下均能保持高效且稳定的脱氮效果。
為提高三維電極生物膜工藝脫氮效率,通過運行不同TOC與TN的質量濃度比(ρ( C)/ρ( N))條件下三維電極生物膜-硫自養耦閤工藝(3BER-S),併建立基于反硝化特異性基因 nirS剋隆文庫,研究瞭ρ(C)/ρ(N)對3BER-S運行特性及反硝化細菌群落的影響。結果錶明:ρ( C)/ρ( N)對3BER-S工藝的脫氮效率影響較小,不同ρ(C)/ρ(N)條件下的TN去除效率基本穩定在80%以上。ρ(C)/ρ(N)對3BER-S體繫內的反硝化細菌種群結構和營養類型均有一定影響。高ρ(C)/ρ(N)條件下,反硝化細菌種類較少,Thauera(陶阨氏菌屬)是體繫內的優勢菌群,脫氮作用以異養反硝化過程為主;噹ρ( C)/ρ( N)降低時,反硝化細菌種類增多,硫自養反硝化細菌所佔比例升高。總之,由于硫磺單質的加入,瀰補瞭3BER工藝低ρ( C)/ρ( N)時的反硝化作用電子供體不足,使得3BER-S耦閤體繫在不同ρ( C)/ρ( N)條件下均能保持高效且穩定的脫氮效果。
위제고삼유전겁생물막공예탈담효솔,통과운행불동TOC여TN적질량농도비(ρ( C)/ρ( N))조건하삼유전겁생물막-류자양우합공예(3BER-S),병건립기우반초화특이성기인 nirS극륭문고,연구료ρ(C)/ρ(N)대3BER-S운행특성급반초화세균군락적영향。결과표명:ρ( C)/ρ( N)대3BER-S공예적탈담효솔영향교소,불동ρ(C)/ρ(N)조건하적TN거제효솔기본은정재80%이상。ρ(C)/ρ(N)대3BER-S체계내적반초화세균충군결구화영양류형균유일정영향。고ρ(C)/ρ(N)조건하,반초화세균충류교소,Thauera(도액씨균속)시체계내적우세균군,탈담작용이이양반초화과정위주;당ρ( C)/ρ( N)강저시,반초화세균충류증다,류자양반초화세균소점비례승고。총지,유우류광단질적가입,미보료3BER공예저ρ( C)/ρ( N)시적반초화작용전자공체불족,사득3BER-S우합체계재불동ρ( C)/ρ( N)조건하균능보지고효차은정적탈담효과。
In order to improve the nitrogen removal efficiency of three-dimension-electrode biofilm process, the effects of ρ( C )/ρ( N ) on operation characteristics and denitrifying bacteria population community characteristics of a coupled 3-dimensional biofilm-electrode with sulfur autotrophic denitrification technology ( 3DBER-S ) were investigated at different ρ( C )/ρ( N ) conditions. The operating result indicates that there is no significant impact ofρ( C)/ρ( N) on denitrification performance in 3BER-S. And the TN removal efficiency is more than 80% at different ρ( C)/ρ( N) conditions. Moreover, the effects ofρ(C)/ρ(N) on denitrifying bacteria population and denitrification nutrition types in 3BER-S system were found. At high ρ( C)/ρ( N) condition, there is less species of denitrifying bacteria in 3BER-S system, where the Thauera acts as the dominant bacteria and heterotrophic denitrification is the main process. When the ρ( C )/ρ( N ) is reduced, both the denitrifying bacteria species and the proportion of sulfur autotrophic denitrification bacteria increase. In a word, the 3BER-S system maintains high and stable nitrogen removal efficiency at differentρ( C)/ρ( N) conditions, because the sulfur makes up for the deficiency of the denitrifying electronic donor in 3BER-S at low ρ(C)/ρ(N)condition.