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Effect of enzymes on anaerobic digestion of primary sludge and septic tank performance

机译：酶对原污泥厌氧消化和化粪池性能的影响

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Enzyme additives are believed to improve septic tank performance by increasing the hydrolysis and digestion rates and maintaining a healthy microbial population. Previous studies reported mixed results on the effectiveness of enzymes on mesophilic and thermophilic digestion, and it is not clear whether enzymes would be effective under septic tank conditions where there is no heating or mixing, quantities of enzymes added are small, and they can be washed out quickly. In this study, batch reactors and continuous-flow reactors designed and operated as septic tanks were used to evaluate whether enzymatic treatment would increase the hydrolysis and digestion rates in primary sludge. Total solids, volatile solids, total suspended solids, total and soluble chemical oxygen demand, concentrations of protein, carbohydrate, ammonia and volatile acids in sludge and effluent samples were measured to determine the differences in digestion rates in the presence and absence of enzymes. Overall, no significant improvement was observed in enzyme-treated reactors compared with the control reactors.
机译：据信，酶添加剂可通过增加水解和消化速率并维持健康的微生物种群来提高化粪池的性能。先前的研究报道了有关酶在嗜温和嗜热消化中的功效的混合结果，尚不清楚酶在没有加热或混合，添加的酶量少且可以洗涤的化粪池条件下是否有效。快出来。在这项研究中，使用设计和运行为化粪池的间歇式反应器和连续流反应器来评估酶处理是否会增加初级污泥的水解和消化速率。测量总固体，挥发性固体，总悬浮固体，总和可溶性化学需氧量，污泥和废水样品中蛋白质，碳水化合物，氨和挥发性酸的浓度，以确定在有无酶的情况下消化率的差异。总体而言，与对照反应器相比，在酶处理的反应器中未观察到明显的改善。

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