Method of producing biocides from industrial process waters

a technology of industrial process water and biocides, applied in the direction of water treatment parameter control, biocidal agent addition, treatment water, etc., can solve the problems of not even providing on-site applications of predominant technologies, existing technologies do not utilize process water for biocide generation, and the application in industrial process water has not been conducted

Inactive Publication Date: 2014-12-11
TEKNOLOGIAN TUTKIMUSKESKUS VTT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a technology that uses electrolysis to create a biocide that can be used to treat other process flows. The technology works well with consistent samples and performs better by adding salt to compensate for salt loss. The technology reduces conductivity levels by decreasing halogen concentration, which improves process efficiency, chemical performance, corrosion control, and waste water management.

Problems solved by technology

Existing technologies do not utilize process waters for biocide generation.
Predominant technologies do not even provide on-site applications.
Inactivation of bacteria in an electrolysis cell has been carried out but the application in industrial process waters has not been conducted.

Method used

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  • Method of producing biocides from industrial process waters
  • Method of producing biocides from industrial process waters
  • Method of producing biocides from industrial process waters

Examples

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Embodiment Construction

[0036]As discussed above, electrochemical generation of oxidants has been studied to find new solutions to control microbial contamination in process waters. The present approach has been used for generating the biocides directly from the process without any chemical additions.

[0037]In the present context, the technology has been applied into the papermaking process but it is applicable to any aqueous process requiring microbial control.

[0038]As the below examples comprising laboratory electrolysis trials indicate direct electrolysis of process waters is an efficient new concept to control microbial contamination at paper mills. Electrolysis considerably reduces the need of halogen containing biocides, thus lessening risk of corrosion.

[0039]Instead of increasing halogen concentration like with the conventional stabilized halogen biocide systems, the electrolysis concept is capable of decreasing the concentration of halogens in the process waters. At the same time the conductivity of...

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Abstract

Method of producing biocides from an aqueous flow of process water, said method comprising the step of subjecting a water flow containing ions which give rise to conductivity through an electrolysis cell in order to generate chemicals with biocidal performance. The method can be used for treating fresh and waste water systems, such as water streams of cooling systems, fermentation, mining and biorefining, for example papermaking process waters. It can be used for reducing halogen concentration.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to the production of biocides. In particular the present invention concerns a method of producing biocides from industrial process waters.[0003]2. Description of Related Art[0004]Conditions in a papermaking process are often favorable for microbes to grow [1]. Microbes in the process can cause a multitude of production problems, from decreased production efficiency via impaired runnability and raw material spoilage to product safety issues [2, 3, 4].[0005]To a great extend microbial control in aqueous systems is based on addition of chemicals (biocides) into the process. They act either by killing microorganisms or by inhibiting the growth of micro-organisms. An ideal biocide should meet several requirements such as: applicability over a wide range of operating conditions, no interference with other additives, broad spectrum of activity towards microbes, efficient and fast-acting, environme...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C25B1/24C25B1/26
CPCC25B1/26C25B1/24D21H21/36C02F1/4674C02F2103/28C02F2209/29C02F2101/12C02F2103/023
InventorPAJARI, HEIKKITSITKO, IRINATUKIAINEN, PAULIINASIEVANEN, JENNIATSUSHI, TANAKAKIURU, JARI
OwnerTEKNOLOGIAN TUTKIMUSKESKUS VTT