扩展ADM1在诱导床反应器(IBR)共消化城市污泥与烘焙废弃物性能预测中的应用

M. E. Demitry, C. Hansen, D. Stevens, M. Mcfarland
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引用次数: 1

摘要

本研究的目的是通过实验和模型研究诱导床反应器(IBR)消化城市污泥(MS)与面包废弃物(BW)混合的稳定性。为了准确预测IBR处理该混合废物的性能,需要对厌氧消化模型1(ADM1)进行修改。在中温条件下,混合进水COD总量为50 g/L,水力停留时间为27 ~ 6天。各HRT下反应器均达到稳定状态,无抑制或失效迹象,但随着HRT的降低,沼气池COD去除率由92%下降至72%。在27天和20天的保留时间内,改进的ADM1输出值与测量的稳定性指标(pH、总挥发性脂肪酸(TVFA)、Q(产气量)、CH4百分比)吻合良好。当HRT较短(12、9和6 d)时,模型高估了pH和甲烷百分比,低估了TVFA。然而,该模型很好地预测了观测数据的趋势和蒸煮池整体稳定过程,直到6 d HRT。本研究为工业烘焙废弃物的处理提供了一种替代方案,也指出了IBR在提供高能量生产的同时稳定管理高废物负荷的能力。
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Extending the Applications of the ADM1 to Predict Performance of the Induced Bed Reactor (IBR) Co-Digesting Municipal Sludge with Bakery Waste
The goal of this research was to examine the stability of the induced bed reactor (IBR) digesting municipal sludge (MS) mixed with bakery waste (BW) by experiment and modeling. It was necessary to modify the Anaerobic Digestion Model number1(ADM1) to accurately predict the performance of the IBR for this mixed waste. The total mixed influent COD was 50 g/L with hydraulic retention times that varied from 27 to 6 days at mesophilic temperatures. The reactor reached the steady state at each HRT with no sign of inhibition or failure, however, the COD removal efficiency of the digester decreased from 92% to 72% with decreasing HRT. The modified ADM1 outputs agreed well with the measured stability indicators (pH, total volatile fatty acid (TVFA), Q (gas production), percent CH4 at the longer retention times of 27, and 20 days. The model overestimated the pH, and methane percentage and underestimated the TVFA when the HRT was shorter (12, 9 and 6 days). However, the model predicted well the trends of the observed data and the overall stability process of the digester until 6 d HRT. This research provided an alternative for the disposal of industrial bakery waste and also pointed out the ability of the IBR to manage high waste loads stably, while providing high energy production.
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