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Innovative Integrated Reactor System for Carbon, Sulfur and Nitrogen Removal Based on Biological Phase-separation

机译:基于生物相分离的碳,硫和氮气去除的创新集成反应器系统

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An innovative biological wastewater treatment system for the removal of organic carbon, sulfur and nitrogen was developed based on biological phase-separation principle. This system consists of three reactors integrated together i.e. sulfate reduction and organic matter removal (SR-CR), autotrophic and heterotrophic denitrifying sulfide removal (A&H-DSR) and nitrification (AN) reactors. In this system, the operational parameters for successful bio-phase separation are sulfate and organic loading rate, hydraulic retention time (HRT), COD/SO_4~(2-) ratio and pH for the SR-CR reactor, and sulfide and nitrate loading rate, HRT, pH, S~(2-)/NO_3~- ratio and COD/NO_3~- for the A&H-DSR reactor. The results from a laboratory scale system demonstrated that for the SR-CR reactor, the optimal operating conditions were HRT>=24 h;;sulfate and organic loading rate <=7.5 kg SO_4~(2-)/m~3.d and <=10 kgCOD/m~3.d;;COD/SO_4~(2-) >=2;;and pH >=6.5. For A&H-DSR process, the optimal conditions are sulfide loading rate <=6.0kg S~(2-)/m~3.d;;nitrate loading rate <=3.5 kg NO_3~-/m~3.d;;S~(2-)/NO_3>=1;;COD/NO_3~- >=1.25:1;;and pH>=7.5. Under such conditions, high sulfate, ammonia and organic matter removal of 99%, 90% and 99% were achieved, respectively. In this case, the elemental sulfur (S~0) reclamation efficiency reached 6.0 kg S~0/m~3.d, around 20 times higher than the maximum level as referred in the literatures. DGGE profiling indicated that the predominant functional organisms of Clostridiaceae sp., Desulfomicrobium sp., Methanosaeta sp. dominated in the SR-CR reactor, and Sulfurovum sp., Pseudomonas aeruginosa and Denitratisoma sp. in the A&H-DSR reactor. These species played essential role in metabolic functions in each bio-phase.
机译:基于生物相分离原理,开发了一种用于去除有机碳,硫和氮的创新的生物废水处理系统。该系统由三个反应器组成,其中整合在一起,即硫酸盐还原和有机物质去除(SR-Cr),自养和异养的硫化硫化硫化物去除(A&H-DSR)和硝化(AN)反应器。在该系统中,用于成功生物相分离的操作参数是硫酸盐和有机加载速率,液压保留时间(HRT),COD / SO_4〜(2-)比率和pH的SR-CR反应器,以及硫化物和硝酸盐载荷用于A&H-DSR反应器的速率,HRT,pH,S〜(2 - )/ NO_3〜 - 比率和COD / NO_3〜 - 实验室规模系统的结果证明,对于SR-CR反应器,最佳操作条件是HRT> = 24小时;硫酸盐和有机加载率<= 7.5kg SO_4〜(2 - )/ m〜3.D和<= 10 kgcod / m〜3.d ;; cod / so_4〜(2-)> = 2 ;;和pH> = 6.5。对于A&H-DSR过程,最佳条件是硫化物负载率<= 6.0kg S〜(2 - )/ m〜3.D;硝酸盐加载速率<= 3.5千克NO_3〜 - / m〜3.d ;; s 〜(2 - )/ no_3> = 1 ;; cod / no_3〜 - > = 1.25:1 ;;和pH> = 7.5。在此条件下,分别硫酸盐高硫酸盐,氨和有机物质分别达到99%,90%和99%。在这种情况下,元素硫(S〜0)回收效率达到6.0kg S〜0 / m〜3.D,比文献中提到的最大水平高约20倍。 DGGE分析表明,TrytrideAe Sp的主要功能生物。,脱硫胶Sp。,甲酸钠。在SR-CR反应器中占据主导,苏尔科温湿菌,铜绿猴和Denitratisoma Sp。在A&H-DSR反应器中。这些物种在每个生物阶段的代谢功能中发挥了重要作用。

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