Abstract The anionic detergent sodium dodecyl benzene sulfonate (SDBS) inhibits anaerobic solid waste fermentation process in mesophilic anaerobic digesters. In this study, the effect SDBS on the performance of anaerobic digestion (AD) of mixture of sewage sludge, food waste, and green waste serving as substrate was investigated. The batch experiments were conducted with five SDBS concentrations namely 0, 0.01, 0.02, 0.05, 0.1, and 0.2 g/g (SDBS/dry sludge) under mesophilic condition (37 ± 1 °C) and lasted for 63 days. The results showed that the presence of SDBS remarkably increased the release of protein and carbohydrate, and resulting in the serious accumulation of volatile fatty acids (VFAs), especially for propionate accumulation. Likewise, the observed variations in enzyme activities associated with different stage of AD revealed that methanogenesis was quite sensitive to SDBS and inhibited by the increase of SDBS addition. Meanwhile, the presence of SDBS decreased the pH value and the concentration of free ammonia, but increased the concentration of NH4+-N. Furthermore, the production of biogas was reduced by SDBS. In conclusion, SDBS addition has a negative impact on anaerobic co-digestion. On the one hand, methanogens were severely inhibited and biogas yield decreased remarkably, on the other hand, the accumulation of VFAs was excessive. Thus, the presence of surfactant (SDBS) in the municipal organic waste should be concerned during the waste disposal via anaerobic digestion process.

中文翻译：

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十二烷基苯磺酸钠（SDBS）对污水污泥、餐厨垃圾和绿色垃圾厌氧共消化性能的影响

摘要 阴离子洗涤剂十二烷基苯磺酸钠 (SDBS) 可抑制中温厌氧消化器中的厌氧固体废物发酵过程。在这项研究中，研究了 SDBS 对作为底物的污水污泥、食物垃圾和绿色垃圾的混合物厌氧消化 (AD) 性能的影响。在中温条件 (37 ± 1 °C) 下，以 0、0.01、0.02、0.05、0.1 和 0.2 g/g（SDBS/干污泥）五种 SDBS 浓度进行批量实验，并持续 63 天。结果表明，SDBS的存在显着增加了蛋白质和碳水化合物的释放，导致挥发性脂肪酸（VFA）的严重积累，尤其是丙酸的积累。同样地，观察到的与 AD 不同阶段相关的酶活性变化表明，产甲烷对 SDBS 非常敏感，并受到 SDBS 添加量增加的抑制。同时，SDBS的存在降低了pH值和游离氨的浓度，但增加了NH4+-N的浓度。此外，SDBS 还减少了沼气的产生。总之，SDBS 添加对厌氧共消化有负面影响。一方面，产甲烷菌受到严重抑制，沼气产量显着下降，另一方面，VFAs积累过多。因此，在通过厌氧消化过程处理废物过程中，应关注城市有机废物中表面活性剂 (SDBS) 的存在。SDBS的存在降低了pH值和游离氨的浓度，但增加了NH4+-N的浓度。此外，SDBS 还减少了沼气的产生。总之，SDBS 添加对厌氧共消化有负面影响。一方面，产甲烷菌受到严重抑制，沼气产量显着下降，另一方面，VFAs积累过多。因此，在通过厌氧消化过程处理废物过程中，应关注城市有机废物中表面活性剂 (SDBS) 的存在。SDBS的存在降低了pH值和游离氨的浓度，但增加了NH4+-N的浓度。此外，SDBS 还减少了沼气的产生。总之，SDBS 添加对厌氧共消化有负面影响。一方面，产甲烷菌受到严重抑制，沼气产量显着下降，另一方面，VFAs积累过多。因此，在通过厌氧消化过程处理废物过程中，应关注城市有机废物中表面活性剂 (SDBS) 的存在。产甲烷菌受到严重抑制，沼气产量显着下降，VFAs积累过多。因此，在通过厌氧消化过程处理废物过程中，应关注城市有机废物中表面活性剂 (SDBS) 的存在。产甲烷菌受到严重抑制，沼气产量显着下降，VFAs积累过多。因此，在通过厌氧消化过程处理废物过程中，应关注城市有机废物中表面活性剂 (SDBS) 的存在。