title: Enhanced dewatering of sludge with the composite of bioflocculant MBFGA1 and P(AM-DMC) as a conditioner.
abstract: 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).
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China, gjy@cuit.edu.cn.
authors: Junyuan
authors: J
authors: Guo
authors: Lichao
authors: L
authors: Nengzi
authors: Jing
authors: J
authors: Zhao
authors: Yuzhe
authors: Y
authors: Zhang
mesh_terms: D000178:Acrylamides / Q000737:chemistry*; D000536:Aluminum Hydroxide / Q000737:chemistry; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000178:Acrylamides; D000644:Quaternary Ammonium Compounds; D012722:Sewage; C515532:poly(acrylamide-co-2-((methacryloyloxy)ethyl)trimethylammonium chloride); C016213:aluminum oxychloride; D000536:Aluminum Hydroxide