A study of the microflocculation-multistage filtration technology of mine water containing suspended solids
In order to solve the problem of difficult solid-liquid separation in the treatment of mine water containing suspended solids, based on the theory of nuclear crystal coagulation induced granulation, the process of “micro flocculation multi stage filtration” of mine water is studied through laborator...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2023-09-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
| Subjects: | |
| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202208080 |
| _version_ | 1797659757978320896 |
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| author | Xiyu ZHANG Shuning DONG Rui WANG Shuxuan WANG Pengkang JIN |
| author_facet | Xiyu ZHANG Shuning DONG Rui WANG Shuxuan WANG Pengkang JIN |
| author_sort | Xiyu ZHANG |
| collection | DOAJ |
| description | In order to solve the problem of difficult solid-liquid separation in the treatment of mine water containing suspended solids, based on the theory of nuclear crystal coagulation induced granulation, the process of “micro flocculation multi stage filtration” of mine water is studied through laboratory experiments. First of all, through the adjustment of reagent dosage and water conservancy conditions, the suspended particles and flocculants are induced to form a copolymer to form a floc settling time curve, and the floc granulation and densification are completed through the selection of optimal parameters. Secondly, four filter media of quartz sand, artificial zeolite, active carbon and aeolian sand are selected to investigate the effects of different media types and particle sizes on the removal efficiency of pollutants, and the physical and chemical reactions generated at the solid-liquid interface are analyzed. Finally, field tests are carried out in typical mines to verify the removal effect of the process on different pollution components. The results show that (1) the sedimentation time can be greatly reduced by adding polyaluminum chloride of 200 mg/L and diatomite of 200 mg/L in the micro flocculation stage. (2) The turbidity removal rate of 1−2 mm quartz sand in the multi-stage filtration stage can reach 97.9%, while the artificial zeolite in the four filter media is the best for the removal of inorganic ions. The removal rates of \begin{document}${\rm{SO}}_4^{2 -} $\end{document}, \begin{document}${\rm{HCO}}_3^- $\end{document} and Na+ in the filtered water can reach 25.5%, 44.1% and 69.9%, respectively. The micro flocculation multi-stage filtration process formed through the research results can greatly reduce the residence time in the process of mine water treatment and improve the solid-liquid separation efficiency. On this basis, the selection of natural diatomite as nucleating agent instead of polyacrylamide can effectively inhibit the generation of acrylamide monomer and reduce environmental risks. In addition, the process has a certain removal effect on inorganic ions. It is good application value for the treatment of mine water containing suspended solids. |
| first_indexed | 2024-03-11T18:19:48Z |
| format | Article |
| id | doaj.art-1829988f359f4230923b2049aa730352 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-03-11T18:19:48Z |
| publishDate | 2023-09-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-1829988f359f4230923b2049aa7303522023-10-16T01:16:39ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652023-09-0150522223010.16030/j.cnki.issn.1000-3665.202208080202208080A study of the microflocculation-multistage filtration technology of mine water containing suspended solidsXiyu ZHANG0Shuning DONG1Rui WANG2Shuxuan WANG3Pengkang JIN4Xi’an Research Institute, CCTEG , Xi’an, Shaanxi 710054, ChinaXi’an Research Institute, CCTEG , Xi’an, Shaanxi 710054, ChinaShaanxi Coal Caojiatan Mining Co. Ltd., Yulin, Shaanxi 719000, ChinaXi’an Research Institute, CCTEG , Xi’an, Shaanxi 710054, ChinaSchool of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaIn order to solve the problem of difficult solid-liquid separation in the treatment of mine water containing suspended solids, based on the theory of nuclear crystal coagulation induced granulation, the process of “micro flocculation multi stage filtration” of mine water is studied through laboratory experiments. First of all, through the adjustment of reagent dosage and water conservancy conditions, the suspended particles and flocculants are induced to form a copolymer to form a floc settling time curve, and the floc granulation and densification are completed through the selection of optimal parameters. Secondly, four filter media of quartz sand, artificial zeolite, active carbon and aeolian sand are selected to investigate the effects of different media types and particle sizes on the removal efficiency of pollutants, and the physical and chemical reactions generated at the solid-liquid interface are analyzed. Finally, field tests are carried out in typical mines to verify the removal effect of the process on different pollution components. The results show that (1) the sedimentation time can be greatly reduced by adding polyaluminum chloride of 200 mg/L and diatomite of 200 mg/L in the micro flocculation stage. (2) The turbidity removal rate of 1−2 mm quartz sand in the multi-stage filtration stage can reach 97.9%, while the artificial zeolite in the four filter media is the best for the removal of inorganic ions. The removal rates of \begin{document}${\rm{SO}}_4^{2 -} $\end{document}, \begin{document}${\rm{HCO}}_3^- $\end{document} and Na+ in the filtered water can reach 25.5%, 44.1% and 69.9%, respectively. The micro flocculation multi-stage filtration process formed through the research results can greatly reduce the residence time in the process of mine water treatment and improve the solid-liquid separation efficiency. On this basis, the selection of natural diatomite as nucleating agent instead of polyacrylamide can effectively inhibit the generation of acrylamide monomer and reduce environmental risks. In addition, the process has a certain removal effect on inorganic ions. It is good application value for the treatment of mine water containing suspended solids.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202208080mine watermicro flocculationmultistage filteringnuclear crystal coagulationfilter medium |
| spellingShingle | Xiyu ZHANG Shuning DONG Rui WANG Shuxuan WANG Pengkang JIN A study of the microflocculation-multistage filtration technology of mine water containing suspended solids Shuiwen dizhi gongcheng dizhi mine water micro flocculation multistage filtering nuclear crystal coagulation filter medium |
| title | A study of the microflocculation-multistage filtration technology of mine water containing suspended solids |
| title_full | A study of the microflocculation-multistage filtration technology of mine water containing suspended solids |
| title_fullStr | A study of the microflocculation-multistage filtration technology of mine water containing suspended solids |
| title_full_unstemmed | A study of the microflocculation-multistage filtration technology of mine water containing suspended solids |
| title_short | A study of the microflocculation-multistage filtration technology of mine water containing suspended solids |
| title_sort | study of the microflocculation multistage filtration technology of mine water containing suspended solids |
| topic | mine water micro flocculation multistage filtering nuclear crystal coagulation filter medium |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202208080 |
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