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Sequential water treating and sterilizing method by chloramine after short free chlorine

A disinfection method and free chlorine technology, applied in the direction of sterilization/microdynamic water/sewage treatment, etc., can solve the problems of inability to take into account the disinfection effect, the generation control of disinfection by-products protected by the remaining disinfectant, and the economical and operability issues. To achieve the effect of effective control of by-product production, reduction of production rate, and economical and efficient disinfection effect

Inactive Publication Date: 2005-02-23
TSINGHUA UNIV +1
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Problems solved by technology

[0010] The purpose of the present invention is to provide a sequential water treatment and disinfection method for short-term free chlorine and then chloramine conversion, which is economical, safe and efficient to achieve dual control of microorganisms and disinfection by-products in water, so as to solve the problem that the current disinfection process cannot take into account the disinfection effect , residual disinfectant protection, disinfection by-product generation control, and lack of economy and operability

Method used

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  • Sequential water treating and sterilizing method by chloramine after short free chlorine
  • Sequential water treating and sterilizing method by chloramine after short free chlorine
  • Sequential water treating and sterilizing method by chloramine after short free chlorine

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Embodiment Construction

[0029] Below in conjunction with embodiment technical solution of the present invention is described further:

[0030] In the water plant disinfection process, the present invention firstly adds chlorine to carry out free chlorine disinfection, then adds ammonia to water after a suitable contact time (generally less than 30min, shorter than conventional chlorine disinfection contact time), and converts free chlorine in water into Chloramine, proceed to chloramine disinfection. According to the different water quality (such as water temperature, pH, bacteriological indicators, concentration of disinfection by-product precursors or organic content), select the appropriate amount of chlorine, free chlorine disinfection time and appropriate proportion of ammonia. The clean water pool is specially constructed to meet the requirements of adjusting the short-term free chlorine disinfection contact time. See attached image 3 .

[0031] The sequential disinfection process of short-...

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Abstract

A water treating and disinfecting process for water works includes such steps as adding chlorine in water for disinfecting water by free cl ions for ions for 5-30 min, and adding ammonia to convert said free cl ions to chloroamine for disinfecting water further.

Description

technical field [0001] The invention relates to a sequential water treatment and disinfection method for short-term free chlorine and then chloramine conversion, in particular to a sequential water treatment and disinfection method for drinking water for short-term free chlorine and then chloramine conversion, belonging to the technical field of disinfection in water treatment . Background technique [0002] At present, the commonly used disinfection processes in the field of drinking water treatment include free chlorine, chloramine, chlorine dioxide, ozone and ultraviolet disinfection processes. [0003] 1. Chlorine disinfection is the most widely used disinfection process at present, with mature technology; it has the advantages of high efficiency and rapid inactivation of microorganisms; and the cost is low. The disadvantage is that the production of chlorinated disinfection by-products (such as trihalomethanes, haloacetic acids, etc.) is large, and there is a danger of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50
Inventor 张晓健陈超何文杰韩宏大
Owner TSINGHUA UNIV
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