There is a need to investigate processes that enable sludge re-use whileenhancing sewage treatment efficiency. Mechanically disintegrated thickenedsurplus activated sludge (SAS) and fermented primary sludge were compared fortheir capacity to produce a carbon source suitable for BNR by completingnutrient removal predictive tests. Mechanically disintegration of SAS using adeflaker enhanced volatile fatty acids (VFAs) content from 92 to 374 mg l−1(4.1-fold increase). In comparison, primary sludge fermentation increased theVFAs content from 3.5 g l−1 to a final concentration of 8.7 g l−1 (2.5-foldincrease). The carbon source obtained from disintegration and fermentationtreatments improved phosphate (PO4-P) release and denitrification by up to 0.04mg NO3-N g−1 VSS min−1 and 0.031 mg PO4-P g−1 VSS min−1, respectively, incomparison to acetate (0.023 mg NO3-N g−1 VSS min−1and 0.010 mg PO4-P g−1 VSSmin−1). Overall, both types of sludge were suitable for BNR but disintegratedSAS displayed lower carbon to nutrient ratios of 8 for SCOD:PO4-P and 9 forSCOD:NO3-N. On the other hand, SAS increased the concentration of PO4-P in thesettled sewage by a further 0.97 g PO4-P kg−1 SCOD indicating its potentialnegative impact towards nutrient recyc
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机译：有必要研究使污泥重新利用同时提高污水处理效率的过程。通过完成营养物去除预测测试，比较了机械分解的增稠剩余活性污泥（SAS）和发酵后的主要污泥的能力，以生产适合BNR的碳源。使用adeflaker进行SAS的机械崩解使挥发性脂肪酸（VFA）含量从92增至374 mg -1（增加4.1倍）。相比之下，初级污泥发酵将VFA的含量从3.5 g l-1增加到8.7 g l-1的终浓度（增加了2.5倍）。通过分解和发酵处理获得的碳源相比，分别提高了0.04mg NO3-N g-1 VSS min-1和0.031 mg PO4-P g-1 VSS min-1改善了磷酸盐（PO4-P）的释放和反硝化作用。乙酸盐（0.023 mg NO3-N g-1 VSS min-1和0.010 mg PO4-P g-1 VSSmin-1）。总体而言，两种类型的污泥均适用于BNR，但崩解的SAS显示出较低的碳营养比：SCOD：PO4-P为8，SCOD：NO3-N为9。另一方面，SAS使这些污水处理过的污水中的PO4-P浓度进一步增加了0.97 g PO4-P kg-1 SCOD，表明其对营养回收的潜在负面影响
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