A novel strategy for rapid formation of biofilm: Polylactic acid mixed with bioflocculant modified carriers. (10th November 2022)

• Record Type: Journal Article
• Authors: Li, Lixin; He, Zhengming; Song, Zhiwei; Sheng, Tao; Dong, Zilong; Zhang, Fugui; Ma, Fang
• Is Part Of: Journal of cleaner production. Volume 374(2022)
• Publication Date: 2022-11-10
• Subjects: Modification -- Bioflocculant -- Biofilm -- Formation -- Microbial community; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.134023
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Aiming at the resolving long biofilm formation period problem of the moving bed biofilm reactor, a method for preparing modified carriers of bioflocculant doped in polylactic acid (PLA) to promote biofilm formation is proposed. The micron-scale porous structure is verified by optical microscopy and scanning electron microscope. The modified material also has nano-scale pores in BET test. FTIR shows that the bioflocculant modified carriers have amino carboxyl and polysaccharide functional groups. The biofilm formation time is shortened, and the removal efficiency of COD and ammonia nitrogen are 14.14–21.15% and 6.08–15.41% higher than that of polyethylene carrier. Extend DLVO theory shows that bioflocculant modified carriers have lower energy barrier (149.18 kT) than other modified carriers. By immersing modified carriers and ordinary carriers in the bioflocculant bacteria solution, the high-throughput sequencing reveals that the microorganisms attached on the carriers of bioflocculant doped in PLA have better biodiversity and abundance of functional gene expression than others. Graphical abstract: Image 1 Highlights: A preparation method of bioflocculant doped in PLA modified carrier is proposed. Biofilm formation is promoted on bioflocculant-doped carriers. The doping of bioflocculant increases the diversity of biofilm communities. Extend DLVO theory shows that bioflocculant-doped carrier has smaller energy barrier.