- Authors
- Liqiang Jin Qilu University of Technology, School of Light Industry and Engineering, Jinan, China
- S. XiuQilu University of Technology, School of Light Industry and Engineering, Jinan, China
- Y. WangQilu University of Technology, School of Light Industry and Engineering, Jinan, China
- Z. Zhang
- J. Fang
- E. Shen
- title
- Minimization of the environmental impact in the chrome tanning process by a closed-loop recycling technology
- Please use the following URL when quoting:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-342324
- conference
- XXXV IULTCS Congress Dresden 2019 / 8th Freiberg Leather Days. Dresden, 25. - 28. Juni 2019
- original_in_proceeding00000
- XXXV IULTCS Congress 2019 - Proceedings
Herausgeber: Dr. Dietrich Tegtmeyer, Dr. Michael Meyer
Erscheinungsort: Dresden
Verlag: Verein für Gerberei-Chemie und -Technik e. V., Freiberg, Forschungsinstitut für Leder und Kunststoffbahnen (FILK) gGmbH, Freiberg
Erscheinungsjahr: 2019 - publication_date
- 2019
- Abstract (EN)
- Content: It is acknowledged that conventional chrome tanning in leather processing discharges significant amounts of chromium, dissolved solids and chlorides. The recycling technology is one of the effective solutions to reduce the environmental impact of chrome tanning waste water at source. In this work, a novel closed recycling technology of chrome tanning wastewater was applied in the tanning process of the goat skins at a pilot scale level. The properties of chrome tanning liquors obtained by the recycling technology and the resultant crust were analyzed. The results show that this close recycling process works well. The contents of Cr2O3, total organic carbon, ammonia nitrogen and chloride ion in the waste water tend to accumulate with the increase of recycling times, and finally reach a balance after 5 times of recycling. The obtained leather sample is full, soft and having a shrinkage temperature comparable to that of conventional chrome tanned leather. SEM images indicate that the resulting leather samples by this recycling technology show fine and clean grain and well-dispersed fibrils. TG and DSC results show that the thermal stability of wet blue leathers tanned by the circular process are similar to those tanned by conventional chrome tanning process. Compared with conventional chrome tanning technology, water, salt and chrome tanning agent are saved in this process, and the zero emission of chrome tanning wastewater is realized. The cleaner production technology exhibits promising application prospect for its economic and environmental benefits. Take-Away: 1. A novel closed recycling technology of chrome tanning wastewater was applied in the tanning process of the goat skins at a pilot scale level. 2. The chrome tanning liquors obtained by the recycling technology and the resultant crust were analyzed. 3. Water, Sodium chloride and chrome tanning agent are saved by the closed recycling technology, and the zero emission of chrome tanning wastewater is realized.
- Keywords (EN)
- chrome tanning liquor, recycling technology, goat skin, zero emission
- Classification (DDC)
- 620
- Classification (RVK)
- ZS 7250
- Publishing house
- Verein für Gerberei-Chemie und -Technik e. V., Freiberg
- Forschungsinstitut für Leder und Kunststoffbahnen (FILK) gGmbH, Freiberg
- corporation_other
- International Union of Leather Technologists and Chemists Societies
- version
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-342324
- Qucosa date of publication
- 26.06.2019
- Document type
- in_proceeding
- Document language
- English
- licence