title: Purified terephthalic acid wastewater biodegradation and toxicity.
abstract: The biodegradation and toxicity of the purified terephthalic acid (PTA) processing wastewater was researched at NJYZ pilot with the fusant strain Fhhh in the carrier activated sludge process (CASP). Sludge loading rate (SLR) for Fhhh to COD of the wastewater was 1.09 d(-1) and to PTA in the wastewater was 0.29 d(-1). The results of bioassay at the pilot and calculation with software Ebis3 showed that the 48h-LC50 (median lethal concentration) to Daphnia magna for the PTA concentration in the wastewater was only 1/10 of that for the chemical PTA. There were 5 kinds of benzoate pollutants and their toxicities existing in the wastewater at least. The toxicity parameter value of the pure chemical PTA cannot be used to predicate the PTA wastewater toxicity. The toxicity of the NJYZ PTA wastewater will be discussed in detail in this paper.
authors.affiliation: The State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China.
authors.forename: Xu-xiang
authors.initials: XX
authors.lastname: Zhang
authors.forename: Yu-qiu
authors.initials: YQ
authors.lastname: Wan
authors.forename: Shu-pei
authors.initials: SP
authors.lastname: Cheng
authors.forename: Shi-lei
authors.initials: SL
authors.lastname: Sun
authors.forename: Cheng-jun
authors.initials: CJ
authors.lastname: Zhu
authors.forename: Wei-xin
authors.initials: WX
authors.lastname: Li
authors.forename: Xiao-chun
authors.initials: XC
authors.lastname: Zhang
authors.forename: Gui-lin
authors.initials: GL
authors.lastname: Wang
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Lu
authors.forename: Xiang
authors.initials: X
authors.lastname: Luo
authors.forename: Ji-dong
authors.initials: JD
authors.lastname: Gu
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D001681:Biological Assay; D003621:Daphnia / Q000187:drug effects; D007928:Lethal Dose 50; D020075:Phanerochaete / Q000378:metabolism*; D010795:Phthalic Acids / Q000378:metabolism* / Q000633:toxicity; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D018675:Toxicity Tests; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D010795:Phthalic Acids; C011363:terephthalic acid