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Treatment system comprising wood-based organic material, use thereof in wastewater treatment, and method for removing dissolved organic compounds from wastewater

A technology for processing systems and organic materials, applied in the field of removing COD and removing dissolved organic compounds, and can solve problems such as ash formation

Active Publication Date: 2022-02-01
KEMIRA OY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it instead leads to the formation of a large amount of ash, which still needs to be landfilled later

Method used

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  • Treatment system comprising wood-based organic material, use thereof in wastewater treatment, and method for removing dissolved organic compounds from wastewater
  • Treatment system comprising wood-based organic material, use thereof in wastewater treatment, and method for removing dissolved organic compounds from wastewater
  • Treatment system comprising wood-based organic material, use thereof in wastewater treatment, and method for removing dissolved organic compounds from wastewater

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Embodiment

[0070] The wastewater used in the following reference examples and application examples 1-5 originated from the manufacture of bleached softwood kraft pulp, and samples were collected after wastewater biological treatment. Precipitation of organic soluble compounds occurred as described in more detail in the Examples below.

[0071] Reference example: COD removal efficiency in waste water when using ferric sulfate coagulant Ferix-3 alone

[0072] The COD removal efficiency of wastewater using ferric sulfate coagulant Ferix-3 (Kemira Oyj) alone is as follows figure 1 shown in . figure 1 . Ferix-3 coagulant alone (dose of the product is 784ppm) tested without pH adjustment and with pH adjustment (dose of the product = 202, 224, 269, 314 and 358ppm; pH = 4) COD removal efficiency. Such as figure 1 It was shown that 90% COD removal could be achieved without pH adjustment at the coagulant dosage of 784 ppm. When the pH value of wastewater was adjusted to 4, when the dosage o...

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Abstract

A treatment system for removing dissolved organic compounds from wastewater, which comprises a water- soluble cationic polymer, and wood-based organic material having an average particle size which is less than 10 mm. The invention relates also use of said treatment system for COD removal in the treatment of wastewaters, and a method for removing dissolved organic compounds from wastewater.

Description

technical field [0001] The present invention relates to a treatment system according to the independent claims presented below and its use for the removal of COD in the treatment of wastewater originating from pulp and / or paper mills. The present invention also relates to a method for the removal of dissolved organic compounds from wastewater originating from pulp and / or paper mills. Background technique [0002] Pulp and paper production is one of the most water-intensive industrial processes, generating large volumes of highly polluted wastewater for every ton of paper or board produced. The chemical oxygen demand (COD) in pulp and paper wastewater can even be as high as 40,000mg / L. Traditionally, water treatment facilities for such wastewater include: primary clarification, to remove total suspended solids and other particulate matter; biological treatment, to remove most dissolved organic matter; secondary clarification, for activated sludge separation; and tertiary tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F103/28
CPCC02F1/5236C02F1/56C02F2103/28C02F1/5245C02F1/5263C02F1/66B03D1/1431B03D2201/002B03D1/028B03D1/001Y02W10/10B01J20/0229B01J20/0248B01J20/24B01J20/261C02F2209/08
Inventor 萨卡里·哈尔图宁马蒂亚斯·彭蒂宁约尼·阿尔格伦苏珊·哈尔科宁马里纳·舍斯塔科娃
Owner KEMIRA OY
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