College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China,
Appl Microbiol Biotechnol. 2015 Apr;99(7):2989-98. doi: 10.1007/s00253-015-6401-z. Epub 2015 Jan 30.
Bioflocculant MBFGA1 was investigated to be used as a conditioner for sludge dewatering, and the response surface methodology (RSM) was employed to study the enhancing performance of the dewatering process by the composite of MBFGA1 and poly(acrylamide [2-(methacryloyloxy)ethyl]-trimethylammonium chloride) (P(AM-DMC)). Results showed that dry solids (DS) and specific resistance to filtration (SRF) of sludge treated by MBFGA1 alone appeared as 21.7 % and 3.6 × 10(12) m kg(-1), respectively, which were much better than FeCl3, Al2(SO4)3, and polyaluminum chloride (PAC), but poorer than P(AM-DMC) in sludge dewatering. Apart from this, the optimized conditioning process for improving the dewaterability of the sludge conditioned by the composite is MBFGA1 of 1.4 g L(-1), P(AM-DMC) of 0.13 g L(-1), CaCl2 of 56.1 mg L(-1), pH value of 7.5, and agitation speed of 149 rpm. Under this optimal condition, DS and SRF appeared as 29.9 % and 2.2 × 10(12) m kg(-1), respectively. Thus, it is feasible and meaningful to enhance the dewaterability of the sludge by the compound uses of MBFGA1 and P(AM-DMC).
生物絮凝剂 MBFGA1 被研究用作污泥脱水的调理剂，采用响应面法（RSM）研究了 MBFGA1 与聚（丙烯酰胺-2-（甲基丙烯酰氧乙基）-三甲基氯化铵）（P（AM-DMC））的复合对脱水过程的增强性能。结果表明，单独用 MBFGA1 处理的污泥的干固体（DS）和过滤比阻（SRF）分别为 21.7%和 3.6×10(12) m kg(-1)，明显优于 FeCl3、Al2(SO4)3 和聚合氯化铝（PAC），但不如 P(AM-DMC)在污泥脱水方面的效果好。此外，优化的复合调理剂条件可显著提高污泥的脱水性能，复合调理剂的最佳条件为 MBFGA1 用量为 1.4 g L(-1)、P(AM-DMC)用量为 0.13 g L(-1)、CaCl2 用量为 56.1 mg L(-1)、pH 值为 7.5、搅拌速度为 149 rpm。在这种最佳条件下，DS 和 SRF 分别为 29.9%和 2.2×10(12) m kg(-1)。因此，通过复合使用 MBFGA1 和 P(AM-DMC)来增强污泥的脱水性能是可行且有意义的。
