CN-224216317-U - Biological film in-situ sampling device of underground water system

CN224216317UCN 224216317 UCN224216317 UCN 224216317UCN-224216317-U

Abstract

The utility model relates to the field of groundwater science and engineering, in particular to an in-situ sampling device for a biological membrane of a groundwater system. The in-situ biomembrane sampling device of the groundwater system comprises a connecting rope, a biomembrane enrichment assembly and a balancing weight. The tail end of the connecting rope is connected with the balancing weight. The biomembrane enrichment component is connected in series on the connecting rope. The weight is configured to maintain a stable state of the connecting string in the underground well by its own weight. The biofilm enrichment assembly includes a collection unit. The plurality of collecting units are linearly arranged along the extending direction of the connecting rope. The collection unit includes a collector. A plurality of collectors are tied to the connecting rope. The shell of the collector is provided with an opening. The interior cavity of the collector is filled with an adhesion matrix. The attachment matrix is configured to provide an attachment surface for the biofilm using a porous structure. The in-situ biological film sampling device for the groundwater system has the characteristics of multi-depth adaptability, sample preservation and enrichment high efficiency, and meets the accurate requirement of groundwater environment monitoring.

Inventors

LI HUIHUI
LI CHENGCHENG
GAO XUBO
LI SIYU
LIU ZHANGHUI
YAN ZHIHUI
WANG XUE

Assignees

中国地质大学（武汉）

Dates

Publication Date: 20260508
Application Date: 20250421

Claims (8)

1. The in-situ sampling device for the biomembrane of the groundwater system is characterized by comprising a connecting rope (1), a biomembrane enrichment assembly and a balancing weight (5); the tail end of the connecting rope (1) is connected with a balancing weight (5), the biomembrane enrichment assembly is connected in series on the connecting rope (1), and the balancing weight (5) is configured to keep the connecting rope (1) in a stable state in an underground well by utilizing self weight; The biological membrane enrichment assembly comprises a collection unit, and a plurality of collection units are linearly distributed along the extending direction of the connecting rope (1); The collecting unit comprises a plurality of collectors (2), the collectors (2) are tied on the connecting rope (1), an opening (21) is formed in a shell of each collector (2), and an adhesion matrix (4) is filled in an inner cavity of each collector (2); the attachment matrix (4) is configured to provide an attachment surface for a biofilm using a porous structure.
2. An in situ sampling device for a groundwater system biofilm according to claim 1, characterized in that the attachment matrix (4) comprises a natural matrix configured to provide an attachment surface for collection of biofilm using gravel and clastic rock and an artificial matrix configured to provide an attachment surface for collection of biofilm using frosted glass beads (42), polyurethane sponge (41) and porous ceramsite.
3. An in situ sampling device for a biological membrane of a groundwater system according to claim 1, characterized in that the collector (2) is tied to the connecting rope (1) by means of a tie (3).
4. A groundwater system biofilm sampling device according to claim 1, characterized in that the collector (2) is provided with an opening and closing structure (22), the collector (2) being configured to open or close an internal cavity with the opening and closing structure (22).
5. An in situ sampling device for a biological membrane of a groundwater system according to any one of claims 1-4, characterized in that each collecting unit is provided with 3 collectors (2), the 3 collectors (2) being arranged in a linear array along the extension direction of the connecting rope (1).
6. The in-situ sampling device for a biological membrane of a groundwater system according to claim 5, wherein the collector (2) is of a spherical structure, and the diameter of the spherical structure is 50mm-60mm.
7. The in-situ sampling device for the biomembrane of the groundwater system according to claim 1, wherein the balancing weight (5) is a lead weight, and the lead weight is tied at the tail end of the connecting rope (1).
8. The in-situ sampling device for the biological film of the underground water system according to claim 1, wherein the side wall of the connecting rope (1) is provided with a depth mark.

Description

Biological film in-situ sampling device of underground water system Technical Field The utility model relates to the field of groundwater science and engineering, in particular to an in-situ sampling device for a biological membrane of a groundwater system. Background Groundwater is used as an important water resource, and the quality condition of the groundwater is directly related to drinking water safety, agricultural production and industrial water guarantee. However, with the acceleration of industrialization and town processes, the problem of groundwater pollution is increasingly prominent, and the continuous migration and diffusion of pollutants through a surface-gas-covered zone-water-bearing layer system form a serious threat to sustainable use of water resources. Under the background, the development of accurate groundwater environment monitoring has great significance for pollution prevention and control and water quality management, and the reliability of the sampling technology directly determines the accuracy of monitoring data. Microorganisms are used as important indicator organisms of the groundwater ecological system, and the community structure and the functional activity of the microorganisms can sensitively reflect the water pollution condition. Groundwater biofilm refers to a microbial aggregate consisting of microorganisms and their secreted extracellular polymers, etc., attached to solid surfaces in groundwater environments, such as well walls, aquifer particles, etc. The underground water biomembrane not only participates in key ecological processes such as pollutant degradation, element circulation and the like, but also causes problems such as well pipe blockage, water outlet efficiency reduction, water quality deterioration and the like due to overgrowth. Through sampling and analyzing the groundwater biomembrane, the biological geochemical action mechanism participated by microorganisms can be deeply analyzed, and scientific basis is provided for groundwater environment protection. At present, underground water biofilm sampling faces a major technical bottleneck that firstly, an underground water well is complex and various in structure, for example, the well diameter is 50-500 mm, the depth of the underground water well is 10-500 m, a traditional scraping method can only obtain a shallow surface layer biofilm sample of the underground water well, namely, a biofilm sample with the depth of less than 5m, and samples with different depths are difficult to obtain at the same time by scraping once, secondly, serious cross contamination risks exist in the sampling process, so that a laboratory analysis result has obvious deviation from an actual situation, and furthermore, the existing device cannot realize efficient in-situ biofilm collection. Disclosure of Invention In view of the technical problems, the utility model provides a biological film in-situ sampling device of a groundwater system, which comprises a connecting rope, a biological film enrichment assembly and a balancing weight; The tail end of the connecting rope is connected with a balancing weight, the biological film enrichment assembly is connected in series on the connecting rope, and the balancing weight is configured to keep the stable state of the connecting rope in the underground well by utilizing the dead weight; The biological membrane enrichment assembly comprises a collection unit, and a plurality of collection units are linearly distributed along the extending direction of the connecting rope; The collecting unit comprises a collector, a plurality of collectors are tied on the connecting rope, an opening is formed in a shell of the collector, and an adhesion matrix is filled in an inner cavity of the collector; The attachment matrix is configured to provide an attachment surface for a biofilm using a porous structure. Preferably, the attachment matrix comprises a natural matrix configured to provide an attachment surface for collection of a biofilm using gravel and clastic rock and an artificial matrix configured to provide an attachment surface for collection of a biofilm using frosted glass beads, polyurethane sponge, and porous ceramsite. Preferably, the collector is tied to the connecting rope by means of a tie. Preferably, the collector is provided with an opening and closing structure, the collector being configured to open or close the internal cavity with the opening and closing structure. Preferably, each collecting unit is provided with 3 collectors, and the 3 collectors are arranged in a linear array along the extending direction of the connecting rope. Preferably, the collector is of spherical configuration with a diameter of 50mm-60mm. Preferably, the balancing weight is a lead weight, and the lead weight is tied at the tail end of the connecting rope. Preferably, the side wall of the connecting rope is provided with depth marks. Compared with the prior art, the in-situ sampling device for the