Techno Press
Techno Press

Membrane Water Treatment   Volume 8, Number 4, July 2017, pages 311-321
DOI: http://dx.doi.org/10.12989/mwt.2017.8.4.311
 
PPTA/PVDF blend membrane integrated process for treatment of spunlace nonwoven wastewater
Hongbin Li, Wenying Shi, Longwei Qin, Hongying Zhu, Qiyun Du, Yuheng Su,Haixia Zhang and Xiaohong Qin

 
Abstract     [Full Text]
    Hydrophilic and high modulus PPTA molecules were incorporated into PVDF matrix via the in situ polymerization of PPD and TPC in PVDF solution. PPTA/PVDF/NWF blend membrane was prepared through the immersion precipitation phase inversion method and nonwoven coating technique. The membrane integrated technology including PPTA/PVDF/NWF blend membrane and reverse osmosis (RO) membrane was employed to treat the polyester/viscose spunlace nonwoven process wastewater. During the consecutive running of six months, the effects of membrane integrated technology on the COD, ammonia nitrogen, suspended substance and pH value of water were studied. The results showed that the removal rate of COD, ammonia nitrogen and suspended substance filtered by PPTA/PVDF blend membrane was kept above 90%. The pH value of the permeate water was about 7.1 and the relative water flux of blend membrane remained above 90%. After the deep treatment of RO membrane, the permeate water quality can meet the water circulation requirement of spunlace process.
 
Key Words
    spunlace nonwoven wastewater; in situ polymerization; PVDF; PPTA; fouling; water flux
 
Address
Hongbin Li, Wenying Shi, Longwei Qin, Hongying Zhu,Yuheng Su,and Haixia Zhang: School of Textiles Engineering, Henan University of Engineering, Henan Engineering Laboratory of New Textiles Development, Zhengzhou, 450007, P.R. China
Qiyun Du: State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin, 300387, P.R. China
Xiaohong Qin:
1) School of Textiles Engineering, Henan University of Engineering, Henan Engineering Laboratory of New
Textiles Development, Zhengzhou, 450007, P.R. China
2) School of Textiles Science, Donghua University, Shanghai, 201620, P.R. China
 

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