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首页> 外文期刊>Fresenius Environmental Bulletin >THE REDUCTION OF VOLATILE SOLIDS AND BIODEGRADATION KINETICS IN ONE-STAGE AUTOTHERMAL THERMOPHILIC AEROBIC DIGESTION FOR SEWAGE SLUDGE TREATMENT
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THE REDUCTION OF VOLATILE SOLIDS AND BIODEGRADATION KINETICS IN ONE-STAGE AUTOTHERMAL THERMOPHILIC AEROBIC DIGESTION FOR SEWAGE SLUDGE TREATMENT

机译：一阶段自热热好氧消化处理污泥的挥发性固体和生物分解动力学的降低

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摘要

In order to investigate the effects of operation parameters on the reduction of volatile solids (VS) and to propose biodegradation kinetics, batch and semi continuous experiments were carried out in a simulated one-stage auto-thermal thermophilic aerobic digestion (ATAD) system. The suggested suitable variables are digestion temperature 55 ℃, total solids (TS) concentration 5-6%, and hydraulic retention time 13-16 days. Primary, secondary, and mixture sludges have moderate impacts on VS reduction, and the ATAD digesters filled with three kinds of sludges may attain similar VS removal as their VS concentrations are within a similar level between 3.2 and 4.0%. VS is a suitable indicator for kinetics analysis. Three correction coefficients including digestion temperature (K_T), sludge concentration (K_1), and different kinds of sludges (K_2) are introduced to the first-order kinetics equation. The formulas for correction coefficients are K_T=0.012×1.024~((T-20)), K_1=(52/TS)~(1.6), K_2=1.0485 ×(VS/TS)~(0.11). The kinetics parameters derived from batch experiments are also suitable for semi continuous operation system.
机译：为了研究操作参数对减少挥发性固体（VS）的影响并提出生物降解动力学，在模拟的一阶段自热嗜热好氧消化（ATAD）系统中进行了分批和半连续实验。建议的合适变量是消化温度55℃，总固体（TS）浓度5-6％和水力停留时间13-16天。初级，次级和混合污泥对VS的降低具有中等影响，并且填充有三种污泥的ATAD消化池的VS去除率可能相似，因为它们的VS浓度在3.2％和4.0％之间的相似水平内。 VS是动力学分析的合适指标。一阶动力学方程引入了三个校正系数，包括消化温度（K_T），污泥浓度（K_1）和不同种类的污泥（K_2）。校正系数的公式为K_T = 0.012×1.024〜（（T-20）），K_1 =（52 / TS）〜（1.6），K_2 = 1.0485×（VS / TS）〜（0.11）。从批处理实验得出的动力学参数也适用于半连续操作系统。

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