Purified terephthalic acid wastewater biodegradation and toxicity.
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.
Zhang
Xu-xiang
XX
The State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China.
Wan
Yu-qiu
YQ
Cheng
Shu-pei
SP
Sun
Shi-lei
SL
Zhu
Cheng-jun
CJ
Li
Wei-xin
WX
Zhang
Xiao-chun
XC
Wang
Gui-lin
GL
Lu
Jian-hua
JH
Luo
Xiang
X
Gu
Ji-dong
JD
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*
D010795:Phthalic Acids; C011363:terephthalic acid