In our previous studies, several papermaking sludge-based flocculants (PSBFs) were synthesized from wood pulp papermaking sludge. The structure-activity relationships of the PSBFs have been investigated in simulated dye wastewater treatment, but their efficiencies in practical printing and dyeing wastewater (PPDW) treatment are unknown. Herein, an PSBF was prepared, and its performance is discussed in comparison to polyaluminium chloride (PAC) and polyacrylamide (PAM) in PPDW treatment. The PSBF was used in three ways: as an independent flocculant, as a PAC aid, or used to treat the effluent of the PAC system. The results indicated that adding PSBF alone produced similar color and chemical oxygen demand (COD_Cr) removals as the PAC system alone, but PSBF performed better than PAC when the pH of PPDW was higher than 7.0. Adding PSBF as a PAC aid improved the color, COD_Cr and turbidity removals, but the elimination efficiencies were slightly lower than those of the PAC + PAM system. However, when PSBF was used as a flocculant to treat the effluent of the PAC system (PAC → PSBF), the effluent qualities were enhanced. Compared with the PAC system, the color and COD_Cr removals of PAC → PSBF system increased by 16.21% and 13.26%, respectively. The excitation and emission matrix fluorescence results indicated that PSBF removed tryptophan-like pollutants more efficiently than PAC. Considering the pH requirements of the subsequent bioreactor treatment in practice, the PAC → PSBF system were also investigated at the PPDW pH level of 7.0. Its maximum removal efficiencies of color, COD_Cr and turbidity were 90.17%, 32.60% and 82.50%, respectively.

在我们以前的研究中，从木浆造纸污泥中合成了几种造纸污泥基絮凝剂（PSBF）。在模拟染料废水处理中已经研究了PSBF的结构-活性关系，但在实际印染废水（PPDW）处理中的效率尚不清楚。本文中，制备了PSBF，并与PPDW处理中的聚氯化铝（PAC）和聚丙烯酰胺（PAM）进行了比较。PSBF的使用方式有三种：作为独立的絮凝剂，作为PAC助剂或用于处理PAC系统的废水。结果表明，单独添加PSBF会产生相似的颜色和化学需氧量（COD _Cr）作为单独的PAC系统去除，但当PPDW的pH值高于7.0时，PSBF的性能优于PAC。添加PSBF作为PAC助剂可以改善颜色，COD _Cr和浊度去除效果，但消除效率略低于PAC + PAM系统。但是，当PSBF用作絮凝剂处理PAC系统的出水（PAC→PSBF）时，出水水质得以提高。与PAC系统相比，颜色和COD _CrPAC→PSBF系统的去除量分别增加了16.21％和13.26％。激发和发射矩阵荧光结果表明，PSBF比PAC更有效地去除了色氨酸样污染物。考虑到实际中后续生物反应器处理的pH要求，还对PPDW pH值为7.0的PAC→PSBF系统进行了研究。其最大的去除颜色，COD _Cr和浊度的效率分别为90.17％，32.60％和82.50％。