Process for treating, circulation recovering and reutilizing zero-discharge of algin production waste water

A technology for producing wastewater and recycling it, applied in sustainable biological treatment, flotation water/sewage treatment, oxidized water/sewage treatment, etc. The effect of low cost and improved product quality

Inactive Publication Date: 2007-11-21
威海长青海洋科技股份有限公司
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Problems solved by technology

[0006] In order to overcome the disadvantages in the prior art that the direct discharge of alginate production wastewater will cause environmental pollution, the treated wastewater will be discharged directly without recycling, and fresh water resources will be wasted. The present invention provides a treatment

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  • Process for treating, circulation recovering and reutilizing zero-discharge of algin production waste water

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Embodiment Construction

[0038] The process of the present invention will be further described below by taking the production of one ton of alginate to produce about 690 tons of waste calcium water and about 390 tons of mixed wastewater as an example.

[0039]As shown in the attached figure, the waste calcium water and mixed wastewater produced by the production of alginate undergo the following treatment processes:

[0040] a. Treatment of waste calcium water

[0041] a.1 Pretreatment of waste calcium water: Flow about 690 tons of waste calcium water into the calcium wastewater regulating tank by itself. The main functions of the calcium wastewater regulating tank are: first, to adjust the amount of buffered temporary water, because the valley peak of drainage is relatively large, and The designed decalcification reaction capacity is low (80m 3 / h); the second is to carry out aeration and oxidation pretreatment on the waste calcium water with the bottom-mounted aeration mixer, and carry out conditio...

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Abstract

A multi-stage treatment for effluent or sewage is carried out by pre-oxidation treating for waste calcium water in production of sodium alginate, decalcifying treating, solid-liquid separating for mixed effluent, oxidation pre-treating, biological filtering, oxidation treating, air-floating treating, flocculating, depositing, efficient ozone circulation and oxidation treating for mixed comprehensive water, de-coloring, filtering, biological oxidation treating and reverse osmosis treating. It's safe, reliable, rational, standard, cheap and efficient, it has better quality and zero-effluent discharge, and saves water sources.

Description

technical field [0001] The invention relates to multi-stage treatment of waste water or sewage, in particular to a process method for the treatment and recycling of alginate production waste water generated when alginate is processed by seaweed and zero discharge. Background technique [0002] Alginate is a natural high molecular polysaccharide polymer extracted from seaweeds such as kelp, macroalgae, Ascophyllum nodosum, and sargassum. It has been widely used as a raw material in the fields of medicine, food, chemical industry, and agriculture. The production process of alginate produces a large amount of wastewater, which mainly includes: waste calcium water and mixed wastewater. in: [0003] Waste calcium water mainly refers to the kelp that is digested with sodium carbonate to obtain viscous sodium alginate mud. After diluting with 100-150 times of water, the glue and residue are mixed by mechanical air mixing, floating and standing. Separation of other impurities, the...

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Application Information

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IPC IPC(8): C02F9/14C02F1/72C02F1/52C02F1/24C02F3/02C02F1/44C02F11/12
CPCY02W10/10
Inventor 王秉心
Owner 威海长青海洋科技股份有限公司
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