Treatment of nitrogen and phosphorus in highly concentrated effluent in SBR and SBBR processes.
Treatment of nitrogen and phosphorus in highly concentrated effluent in SBR and SBBR processes.
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DOI：
10.2166/wst.2004.0385
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
V. Pambrun;E. Paul;M. Spérandio
中科院分区：
文献类型：
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作者：
V. Pambrun;E. Paul;M. Spérandio
不同的污泥处理工艺产生的上清液氨氮浓度在500~2000mgN/L之间，磷酸盐浓度普遍较高。通过部分硝化将氨转化为亚硝酸盐已被证明是一种经济的方法，在硝化/反硝化过程中减少了氧气和外部COD的需求。同时研究了序批式反应器(SBR)和序批式生物膜反应器(SBBR)两种具有生物量滞留的工艺。在30℃的温度下，研究了高氨浓度对亚硝酸氧化细菌的抑制作用，以获得稳定的亚硝酸盐积累。这项工作证实了pH和溶解氧对亚硝酸盐积累性能的影响。在两个月的启动期内，当pH保持在7.5时，这两个过程都导致了亚硝酸盐的积累，但没有产生硝酸盐。在500mGN/L出水中，SBR和SBBR的处理性能分别达到0.95gN-NO2-/gN-NH4+和0.4gN-NO2-/gN-NH4+左右。SBBR在面对溶解氧条件的扰动时似乎更稳定。最后，根据反应器中氨氮的积累，SBR的最大除磷效率可达90%，SBBR的最大除磷效率可达70%。根据对反应器中晶体的观察，很可能会发生磷酸铵沉淀。
Various sludge treatment processes produced supernatant with high ammonia concentration from 500 to 2,000 mgN/L and generally high phosphate concentration. Conversion of ammonia into nitrite via partial nitrification has proven to be an economic way, reducing oxygen and external COD requirements during the nitrification/denitrification process. Two processes with biomass retention are studied simultaneously: the sequencing batch reactor (SBR) and the sequencing batch biofilm reactor (SBBR). At a temperature of 30 degrees C, the inhibition of nitrite-oxidizing bacteria due to high ammonia concentration has been studied in order to obtain a stable nitrite accumulation. This work has confirmed the effect of pH and dissolved oxygen on nitrite accumulation performance. During a two month starting period, both processes led to nitrite accumulation without nitrate production when pH was maintained above 7.5. From a 500 mgN/L effluent, the performance of the SBR, and the SBBR, reached respectively about 0.95gN-NO2-/gN-NH4+, and 0.4gN-NO2-/gN-NH4+. The SBBR appears to be more stable facing disturbances in dissolved oxygen conditions. Finally, the maximal phosphate removal rates obtained in the SBR reached 90%, and 70% in the SBBR, depending on ammonium accumulation in the reactor. Ammonium phosphate precipitation is likely to occur, as was suggested by crystals observation in the reactor.