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downifthebioreactorlandfillwastobeoperatedforinsitunitrogenremoval.Duringtheinitialst...
down if the bioreactor landfill was to be operated for in situ nitrogen removal. During the initial stage, the leachate from the BLF and NBLF did not exhibit long-term COD accumulation and depression of pH, indicating that the hydrolyzed products could be consumed and/or removed as fast as they produced. Over a refuse reactor balance of leachate COD could be stated as follows
COD out=COD hydrolyzed+COD in — COD consumed;
where the COD consumed included the organic carbon assimilated by microbes, transformed into gas phase and lost in sampling. The COD attenuations of the BLF and NBLF went through two stages and degradation rate chan- ged significantly, which might be explained by the expres- sions. During the first stage, the COD attenuation rate of S4 was slower than that of S5. Based on the well established principle that pH (<6.0) in leachate was an effective inhib- itor of methanogenesis (Chynoweth et al., 1992), the COD consumed by microbial assimilation and transformation into CO2 was also little and negligible in the first stage. Meanwhile, the input COD also could be negligible be- cause the BLF and NBLF were circulated with S2 and S3 those containing little organic matter. Consequently, the interaction that refuse dissolved (or hydrolyzed) into leach- ate and recirculation caused dilution resulted in COD change of S4. In contrast to the BLF, denitrification proceeded in the NBLF. Thus, it was the interactions that dissolution (or hydrolysis) of solid refuse into leachate, dilution by recirculation and organic consumption led to the COD change of S5. The COD attenuation was mostly decided by solid refuse hydrolysis in either S4 or S5. 展开
COD out=COD hydrolyzed+COD in — COD consumed;
where the COD consumed included the organic carbon assimilated by microbes, transformed into gas phase and lost in sampling. The COD attenuations of the BLF and NBLF went through two stages and degradation rate chan- ged significantly, which might be explained by the expres- sions. During the first stage, the COD attenuation rate of S4 was slower than that of S5. Based on the well established principle that pH (<6.0) in leachate was an effective inhib- itor of methanogenesis (Chynoweth et al., 1992), the COD consumed by microbial assimilation and transformation into CO2 was also little and negligible in the first stage. Meanwhile, the input COD also could be negligible be- cause the BLF and NBLF were circulated with S2 and S3 those containing little organic matter. Consequently, the interaction that refuse dissolved (or hydrolyzed) into leach- ate and recirculation caused dilution resulted in COD change of S4. In contrast to the BLF, denitrification proceeded in the NBLF. Thus, it was the interactions that dissolution (or hydrolysis) of solid refuse into leachate, dilution by recirculation and organic consumption led to the COD change of S5. The COD attenuation was mostly decided by solid refuse hydrolysis in either S4 or S5. 展开
2个回答
2008-02-27
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下来,如果生物反应器垃圾填埋将为在原处氮气撤除被管理。 在最初的阶段期间,从BLF的沥滤液和NBLF没有陈列长期鳕鱼酸碱度储积和消沉,表明可能一样快速地被消耗并且/或者去除被水解的产品,象他们生产了。 在废物反应器沥滤液鳕鱼平衡能如下陈述 在—鳕鱼的COD out=COD hydrolyzed+COD消耗了;
那里鳕鱼消耗了在采样包括同化由微生物,被变换成气相和失去的有机碳。 BLF和NBLF的鳕鱼衰减审阅显著ged的二阶段和退化率chan-,也许用expres- sions解释。 在第一阶段期间, S4的鳕鱼衰减率比那慢S5。 基于源远流长的原则酸碱度(
那里鳕鱼消耗了在采样包括同化由微生物,被变换成气相和失去的有机碳。 BLF和NBLF的鳕鱼衰减审阅显著ged的二阶段和退化率chan-,也许用expres- sions解释。 在第一阶段期间, S4的鳕鱼衰减率比那慢S5。 基于源远流长的原则酸碱度(
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