title: Preparation and characteristics of bacterial polymer using pre-treated sludge from swine wastewater treatment plant.
abstract: Sterilization, alkaline-thermal, and acid-thermal treatments were applied to different suspended sludge solids (SSS) concentrations and the pre-treated sludge was used as raw material for bioflocculant-producing bacteria R3 to produce bioflocculant. After 60 h of fermentation, three forms of bioflocculant (broth, capsular, and slime) were extracted, and maximum broth bioflocculant of 2.9 and 4.1 g L(-1) were produced in sterilized and alkaline-thermal treated sludge as compared to that of 1.8 g L(-1) in acid-thermal treated sludge. Higher bioflocculant quantity was produced in SS of 15, 25, and 35 g L(-1) compared to that produced in SS of 45, 55, and 65 g L(-1). Bioflocculant combined with 0.5 g Ca(2+) in 1.0 L kaolin suspension acted as conditioning agent, and maximum flocculating activity of 94.5% and 92.8% was achieved using broth and slime bioflocculant, respectively. The results demonstrated that wastewater sludge could be used as sources to prepare bioflocculants.
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China. Electronic address: gjy@cuit.edu.cn.
authors: Junyuan
authors: J
authors: Guo
authors: Zhejiang Provincial Key Laboratory of Waste Treatment and Recycling, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China; College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China.
authors: Chunping
authors: C
authors: Yang
authors: College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China.
authors: Lanyan
authors: L
authors: Peng
mesh_terms: D000818:Animals; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism*; D001704:Biopolymers / Q000096:biosynthesis*; D005427:Flocculation / Q000187:drug effects; D007616:Kaolin / Q000494:pharmacology; D012722:Sewage / Q000382:microbiology*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D034421:Sus scrofa; D013696:Temperature; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification
chemical_list: D001704:Biopolymers; D007616:Kaolin; D012722:Sewage; D062065:Wastewater
keywords: Fermentation; Flocculating activity; Polymeric substances; Pre-treatment; Swine wastewater sludge