| Recovery for Skim Rubber Using Bi-directional Flow Ultrafiltration with PVDF Hollow Fiber |
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| DOI： |
| Key Words: hollow fiber membrane；bi directional flow process；concentration；skim rubber |
| Author Name | Affiliation | | GUO Ming-wan | Hainan University | | LIAO Shuang-quan | Hainan University | | YU Ren-tong | Hainan University | | YANG Xiao-hong | Hainan University | | DING Ai-wu | Hainan Natural Rubber Industry Group Co.，Ltd | | LI Ru-lang | Hainan Natural Rubber Industry Group Co.，Ltd |
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| Abstract: |
| In this study，the influence of transmembrane pressure difference，operating temperature and crossflow velocity on the skim rubber recovery as well as efficiency of ammonia removal were investigated，using a bi-directional flow（BDF）ultrafiltration equipment with polyvinylidene fluoride （PVDF） hollow fiber as the membrane material.Then，the quality of the recovered skim rubber was analyzed.The results showed that，the recovery of skim rubber increased with the increase of transmembrane pressure difference，and decreased with the increase of operating temperature or crossflow velocity.The efficiency of ammonia removal decreased with the increase of transmembrane pressure difference and increased with the increase of temperature.It was not affected significantly by crossflow velocity.As the transmembrane pressure difference increased，the targeted processing time was shortened at first and then extended.With the increase of operating temperature or crossflow velocity，the target processing time was reduced.The quality of the skim rubber via the BDF process reached the first grade standard by the Ministry of Agriculture. |
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