化学强化初沉污泥厌氧消化产甲烷潜力研究

该试验以化学强化初沉污泥为研究对象，采用中温/高温(35℃/55℃)厌氧消化方法，研究采用化学一级强化处理工艺(CEPT)产生的化学强化初沉污泥厌氧消化产甲烷效果，并对比化学强化初沉污泥在中温、高温工况的厌氧消化产甲烷性能，明确适合化学强化初沉污泥的处理工艺。研究结果表明，化学强化初沉污泥单位VSS累积产甲烷量和VSS降解率较普通初沉污泥有显著提升，且中温厌氧消化工况较高温厌氧消化工况高。其中，化学强化初沉污泥20 mg·L^-1Fe³⁺组在中温厌氧消化工况下单位VSS累积产甲烷量和VSS降解率较普通初沉污泥分别提高了49.6%,10.9%;在高温厌氧消化工况下单位VSS累积产甲烷量和VSS降解率较普通初沉污泥分别提高了25.3%,7.8%。因此，化学强化初沉污泥适宜采用中温厌氧消化工艺进行处理。

Study on the Potential of Anaerobic Digestion of Methane by Chemically Enhanced Primary Sludge

In this experiment,the chemically enhanced primary sludge was used as the research object,using the method of mesophilic or thermophilic(35℃/55℃)anaerobic digestion to study the chemically enhanced primary sludge produced by the chemically enhanced primary treatment(CEPT)anaerobic digestion methanogenic effect and compare the methanogenic performance of chemically enhanced primary sludge in mesophilic and thermophilic anaerobic digestion and clear the treatment process suitable for chemically enhanced primary sludge.The results show that the cumulative methane production and VSS degradation rate of chemically enhanced primary sludge under mesophilic and thermophilic anaerobic digestion are significantly higher than those of ordinary primary sludge and the thermophilic anaerobic digestion are higher;Under mesophilic anaerobic digestion conditions,the chemically enhanced primary sludge per VSS cumulative methane production and VSS degradation rate are higher than those of the thermophilic anaerobic digestion conditions.Among them,the chemically enhanced primary sludge 20 mg·L^-1Fe³⁺group under the mesophilic digestion conditions,the cumulative methane production per VSS and VSS degradation rate increased by 49.6%,10.9%,respectively.The chemically enhanced primary sludge 20 mg·L^-1Fe³⁺ group under the thermophilic anaerobic digestion conditions,the cumulative methane production per VSS and VSS degradation rate increased by 25.3%,7.8%,respectively.Therefore,the chemically enhanced primary sludge is suitable for mesophilic anaerobic digestion.