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Bone gelatin liming wastewater treatment method
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A technology for bone gelatin and waste water, which is applied in the field of water treatment, can solve the problems of complex operation process and lack of resource utilization, and achieves the effect of simple process and high-efficiency separation.
Pending Publication Date: 2021-11-26
自然资源部天津海水淡化与综合利用研究所
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However, the operation flow of this process is still relatively complicated, and the ions in the wastewater, especially a large amount of calcium ions, are directly discharged in the form of sludge, which has not been well utilized as a resource.
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[0030] (1) with 50mM, pH=8.5Tris-HCl buffer solution is the solution that solvent preparation contains 5g / L dopamine, adds ozone water and makes final concentration be 0.05mg / L, stirs and is mixed with co-deposition solution; Described Tris is three Abbreviation for hydroxymethylaminomethane;
[0032] (3) Inject the co-deposition solution obtained in step (1) into the shell side of the ultrafiltration membrane module obtained in step (2), leave to coat and react for 6 hours, and drain the liquid;
[0033] (4) washing twice with ultrapure water in the shell side of the ultrafiltration membrane module obtained in step (3), to obtain a bionic modified ultrafiltration membrane module.
[0034] The membrane substrate of the ultrafiltration membrane module is polysulfone...
Embodiment 2
[0036] The bionic modified ultrafiltration membrane module is made by the following method:
[0037] (1) With 50mM, pH=8.5Tris-HCl buffer solution is the solution that solvent preparation contains 1g / L dopamine, adds ozone water and makes final concentration be 0.1mg / L, stirs and is mixed with co-deposition solution; Described Tris is three Abbreviation for hydroxymethylaminomethane;
[0039] (3) Inject the co-deposition solution obtained in step (1) into the shell side of the ultrafiltration membrane module obtained in step (2), leave to coat and react for 12 hours, and drain the liquid;
[0040] (4) washing twice with ultrapure water in the shell side of the ultrafiltration membrane module obtained in step (3), to obtain a bionic modified ultrafiltration membrane module.
[0041] The membrane substrate of the ultrafiltration membrane module is polyethersu...
Embodiment 3
[0043] The bionic modified ultrafiltration membrane module is made by the following method:
[0044] (1) With 50mM, pH=8.5Tris-HCl buffer solution is the solution that solvent preparation contains 10g / L dopamine, adds ozone water and makes final concentration be 1.0mg / L, stirs and is mixed with co-deposition solution; Described Tris is three Abbreviation for hydroxymethylaminomethane;
[0045] (2) Add ultrapure water to the shell side of the ultrafiltration membrane module for wetting; discharge water;
[0046] (3) Inject the co-deposition solution obtained in step (1) into the shell side of the ultrafiltration membrane module obtained in step (2), leave to coat and react for 1 hour, and drain the liquid;
[0047] (4) washing the shell side of the ultrafiltration membrane module obtained in step (3) with ultrapure water three times to obtain a bionic modified ultrafiltration membrane module.
[0048] The membrane substrate of the ultrafiltration membrane module is polyvinyli...
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Abstract
The invention discloses a bone gelatin liming wastewater treatment method. The method comprises the following steps: introducing supernate of the bone gelatin liming wastewater into a water collecting tank through a first pump, sequentially adding a coagulant and a flocculant into the water collecting tank, and completely precipitating the mixture to obtain first sludge and upper-layer wastewater; adding an oxidizing agent into the upper-layer wastewater, standing to obtain first upper-layer wastewater, introducing the first upper-layer wastewater into an inclined plate sedimentation tank, settling the mixture to obtain second sludge and second upper-layer wastewater, introducing the second upper-layer wastewater into a bionic modified ultrafiltration membrane assembly, separating the mixture to obtain produced water and concentrated water, and conveying the concentrated water through a pipeline by a second pump to be converged with the bone gelatin liming wastewater; and introducing the produced water into an evaporation crystallizer for evaporation to obtain fresh water and calciumchloride crystals. The method is simple and convenient in process, can be continuously operated, and is environment-friendly and energy-saving. By means of the method, the organic matters and inorganic matters in the bone gelatin liming wastewater can be efficiently separated, so that the wastewater is finally evaporated and crystallized to prepare fresh water and calciumchloride crystals, and resource utilization is realized.
Description
technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a bionic modified ultrafiltration membrane module and a treatment method for bone gelatin liming wastewater. Background technique [0002] At present, gelatin is one of the very important natural biopolymer materials, which has been widely used in food, medicine and chemical industries. Extracting gelatin from animal bones is the most commonly used gelatin extraction process. However, a large amount of wastewater will be generated during the gelatin extraction process, mainly including gelatin extraction wastewater, pickling wastewater and liming wastewater. Among them, although the liming process can produce calciumhydrogenphosphate as a by-product, the high COD and oil in the wastewater are prone to serious environmental pollution, mainly manifested in the deterioration of river water quality and soil quality decline. The process flow of gelatin wastewate...
Claims
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Application Information
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