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Alberto Vergara-Fernndez Gisela Vargas Nelson Alarcn Antonio Velasco 《Biomass & bioenergy》2008,32(4):338-344
The marine algae are considered an important biomass source; however, their utilization as energy source is still low around the world. The technical feasibility of marine algae utilization as a source of renewable energy was studied to laboratory scale. The anaerobic digestion of Macrocystis pyrifera, Durvillea antarctica and their blend 1:1 (w/w) was evaluated in a two-phase anaerobic digestion system, which consisted of an anaerobic sequencing batch reactor (ASBR) and an upflow anaerobic filter (UAF). The results show that 70% of the total biogas produced in the system was generated in the UAF, and both algae species have similar biogas productions of 180.4(±1.5) mL g−1 dry algae d−1, with a methane concentration around 65%. The same methane content was observed in biogas yield of algae blend; however, a lower biogas yield was obtained. In conclusion, either algae species or their blend can be utilized to produce methane gas in a two-phase digestion system. 相似文献
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针对臭氧耦合ASBR/SBR污泥减量化工艺,研究了臭氧氧化对硝化和反硝化能力的影响。结果表明,在臭氧投加量为0.074gO3/gSS左右的条件下,系统进水的COD平均值由氧化前的659mg/L增加到氧化后的713mg/L,碳源量提高了8.2%。进水氨氮由34.3mg/L增加到39.9mg/L,出水氨氮由1.7mg/L升高至1.9mg/L,硝化能力基本未受到影响。SBR段的出水NO3--N平均值由5.85mg/L下降为2.2mg/L,表明系统的反硝化能力增强。投加臭氧前后,系统进水TN平均值分别为49.1mg/L和52.9mg/L,出水TN平均值分别为10.9和13.4mg/L,对TN的平均去除率分别为77.7%和74.6%。可见,臭氧氧化未对SBR段的硝化和反硝化效果产生明显影响。 相似文献
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ASBR与脉冲进水SBR组合工艺处理垃圾渗滤液 总被引:1,自引:0,他引:1
为了研究厌氧-好氧工艺处理垃圾渗滤液的脱氮性能,采用ASBR联合脉冲进水SBR(脉冲SBR)处理高氨氮实际垃圾渗滤液.ASBR的水力停留时间为2d;中间水箱调节脉冲SBR的进水C/N(3~5)和NH4+-N浓度;脉冲SBR采用3次等量进水模式,运行周期分为4个缺氧段和3个好氧段,不投加外碳源,缺氧4利用污泥内碳源进行反硝化.结果表明,串联运行时期(157 d)系统获得了高效的脱氮性能.ASBR进水COD为7 338~10 445 mg·L-1,去除率在83%以上;脉冲SBR进水NH4+-N浓度分4个阶段逐步提高至912.0±41.7 mg·L-1,总氮(TN)去除率在90%以上,出水总氮小于40 mg·L-1;系统COD和总氮去除率分别在87%和97%以上.单个缺氧4进程内的内源反硝化速率(DNR)会由快变慢,而其平均理论内源反硝化速率(TDNRm)达到了1.531 mgN·h-1·gMLVSS-1.在不使用物化预处理和不投加外碳源的情况下实现了对渗滤液的深度脱氮. 相似文献
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不同污泥源条件下ASBR启动对比研究 总被引:1,自引:0,他引:1
厌氧序批式反应器(ASBR)实际应用的关键环节在于如何实现快速启动.为了缩短ASBR的启动时间,实验研究了接种不同污泥对快速启动的影响.分别接种市政污水处理厂的二沉池剩余污泥和升流式厌氧污泥床反应器(UASB)中的厌氧污泥.以淀粉为基质,在恒温35℃条件下,逐步增加进水COD浓度和缩短水力停留时间,经过75d的培养,泥粒径分别达到了1.1mm和1.4mm,有机负荷达到5.6kg/(m3·d),COD去除率分别达到85%和90%,出水VFA浓度均小于200mg/L,且系统运行稳定,均实现了ASBR的快速启动. 相似文献