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