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Co-application of energy uncoupling and ultrafiltration in sludge treatment: Evaluations of sludge reduction, supernatant recovery and membrane fouling control
Frontiers of Environmental Science & Engineering ( IF 6.1 ) Pub Date : 2020-04-04 , DOI: 10.1007/s11783-020-1238-9
An Ding , Yingxue Zhao , Zhongsen Yan , Langming Bai , Haiyang Yang , Heng Liang , Guibai Li , Nanqi Ren

Energy uncoupling is often used for sludge reduction because it is easy to operate and does not require a significant amount of extra equipments (i.e. no additional tank required). However, over time the supernatant extracted using this method can deteriorate, ultimately requiring further treatment. The purpose of this study was to determine the effect of using a low-pressure ultrafiltration membrane process for sludge water recovery after the sludge had undergone an energy uncoupling treatment (using 3,3′,4′,5-tetrachlorosalicylanilide (TCS)). Energy uncoupling was found to break apart sludge floc by reducing extracellular polymeric substances (EPS) and adenosine triphosphate (ATP) content. Analysis of supernatant indicated that when energy uncoupling and membrane filtration were coapplied and the TCS dosage was below 30 mg/L, there was no significant deterioration in organic component removal. However, ammonia and phosphate concentrations were found to increase as the concentration of TCS added increased. Additionally, due to low sludge concentrations and EPS contents, addition of 30-60 mg/LTCS during sludge reduction increased the permeate flux (two times higher than the control) and decreased the hydraulic reversible and cake layer resistances. In contrast, high dosage of TCS aggravated membrane fouling by forming compact fouling layers. In general, this study found that the co-application of energy uncoupling and membrane filtration processes represents an effective alternative method for simultaneous sludge reduction and sludge supernatant recovery.



中文翻译:

能量解耦和超滤在污泥处理中的共同应用:污泥减少,上清液回收和膜污染控制的评估

能量解耦通常用于减少污泥,因为它易于操作且不需要大量的额外设备(即不需要额外的水箱)。但是,随着时间的流逝,使用此方法提取的上清液可能会变质,最终需要进一步处理。这项研究的目的是确定在污泥经过能量解偶联处理(使用3,3',4',5-四氯水杨酰苯胺(TCS))后,使用低压超滤膜工艺回收污泥的效果。发现能量解偶联通过降低细胞外聚合物(EPS)和三磷酸腺苷(ATP)含量来分解污泥絮凝物。上清液分析表明,当能量解偶联和膜过滤同时应用且TCS剂量低于30 mg / L时,有机成分去除没有明显的恶化。然而,发现氨和磷酸盐的浓度随着添加的TCS浓度的增加而增加。此外,由于低的污泥浓度和EPS含量,在污泥减少期间添加30-60 mg / LTCS会增加渗透通量(比对照高两倍),并降低水力可逆性和滤饼阻力。相反,高剂量的TCS通过形成致密的结垢层而加剧了膜结垢。总的来说,这项研究发现能量解耦和膜过滤工艺的共同应用代表了同时减少污泥和回收污泥上清液的有效替代方法。发现氨和磷酸盐的浓度随着添加的TCS浓度的增加而增加。此外,由于低的污泥浓度和EPS含量,在污泥减少期间添加30-60 mg / LTCS会增加渗透通量(比对照高两倍),并降低水力可逆性和滤饼阻力。相反,高剂量的TCS通过形成致密的结垢层而加剧了膜结垢。总的来说,这项研究发现能量解耦和膜过滤工艺的共同应用代表了同时减少污泥和回收污泥上清液的有效替代方法。发现氨和磷酸盐的浓度随着添加的TCS浓度的增加而增加。此外,由于低的污泥浓度和EPS含量,在污泥减少期间添加30-60 mg / LTCS会增加渗透通量(比对照高两倍),并降低水力可逆性和滤饼阻力。相反,高剂量的TCS通过形成致密的结垢层而加剧了膜结垢。总的来说,这项研究发现能量解耦和膜过滤工艺的共同应用代表了同时减少污泥和回收污泥上清液的有效替代方法。在污泥减少过程中添加30-60 mg / LTCS会增加渗透通量(比对照高两倍),并降低水力可逆性和滤饼层阻力。相反,高剂量的TCS通过形成致密的结垢层而加剧了膜结垢。总的来说,这项研究发现能量解耦和膜过滤工艺的共同应用代表了同时减少污泥和回收污泥上清液的有效替代方法。在污泥减少过程中添加30-60 mg / LTCS会增加渗透通量(比对照高两倍),并降低水力可逆性和滤饼层阻力。相反,高剂量的TCS通过形成致密的结垢层而加剧了膜结垢。总的来说,这项研究发现能量解耦和膜过滤工艺的共同应用代表了同时减少污泥和回收污泥上清液的有效替代方法。

更新日期:2020-04-21
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