CN112777721A - Small centralized water supply disinfection treatment method - Google Patents
Small centralized water supply disinfection treatment method Download PDFInfo
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- CN112777721A CN112777721A CN202011463047.3A CN202011463047A CN112777721A CN 112777721 A CN112777721 A CN 112777721A CN 202011463047 A CN202011463047 A CN 202011463047A CN 112777721 A CN112777721 A CN 112777721A
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- Prior art keywords
- water
- residual chlorine
- factory
- increased
- stroke
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/29—Chlorine compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/14—Treatment of water in water supply networks, e.g. to prevent bacterial growth
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
A small centralized water supply disinfection treatment method comprises the following steps; adding sodium hypochlorite stock solution into a metering tank, preparing industrial water into a medicament solution with effective chlorine concentration, and starting a medicament adding pump to add medicament when a water plant runs; the sodium hypochlorite dosing pump is manually controlled, when the residual chlorine in the factory water is lower than a set lower limit, the stroke of the dosing pump is increased, a medicament is added into an inlet of the reservoir, and the detection frequency is increased; when the residual chlorine of the factory water is higher than the set upper limit, the stroke of a dosing pump is reduced, the detection frequency is increased, and the residual chlorine of the factory water with the water supply radius of less than 2km is ensured to be in the range of 0.04-0.10 mg/L; sampling and analyzing 2 times every day during the operation period of the water plant, periodically sampling the factory water and the pipe network tail water and sending the samples to a local disease prevention control center for detection, wherein the detection items comprise microbial indexes such as escherichia coli and the like, toxicological indexes, sensory properties and general chemical indexes. The invention can ensure that the effluent of a water plant and the domestic water at the end of a pipe network meet the requirements.
Description
Technical Field
The invention relates to the technical field of domestic water disinfection treatment, in particular to a small centralized water supply disinfection treatment method.
Background
The sodium hypochlorite disinfection method is applied to the sterilization and disinfection of the drinking water for killing pathogenic microorganisms in the water. When chlorine and a free chlorine preparation (free chlorine) are used as disinfectants, the quality of the domestic drinking water for centralized water supply meets the requirements that the residual chlorine in factory water is more than or equal to 0.3mg/L and the residual chlorine in water at the periphery of a pipe network is more than or equal to 0.05 mg/L. But during the disinfection process, various disinfection byproducts such as trihalomethanes and haloacetic acids are generated.
By adopting a disinfection treatment method, the residual chlorine of the factory water of the small centralized water supply facility with the water supply radius less than 2km is optimally controlled, the water outlet of the water plant and the residual chlorine of the water outlet of the pipe network terminal water are reduced to a certain level under the condition that the water quality of the pipe network terminal domestic water meets the indexes such as microbial indexes, toxicological indexes, sensory properties, general chemical indexes and the like of escherichia coli in sanitary Standard for Drinking Water (GB5749-2006), and the corrosion of a water supply pipeline and the harm of disinfection byproducts to human bodies are reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a small centralized water supply disinfection treatment method which can effectively ensure the safety of equipment and ensure the life health of human bodies.
In order to achieve the purpose, the invention adopts the technical scheme that:
a small centralized water supply disinfection treatment method comprises the following steps;
(1) sodium hypochlorite stock solution (the concentration of available chlorine is more than or equal to 10%) is added into a metering box, and industrial water is prepared into 4.0-5.0 multiplied by 104Starting a dosing pump to add the medicament when a water plant runs;
sampling the factory water through a sampling tube, and respectively detecting the pH value, the residual chlorine and the turbidity of the factory water by adopting a pH meter, a residual chlorine meter and a turbidity meter; sampling the pipe network end to detect residual chlorine, and sending the pipe network end to a local disease prevention and control center for water quality detection;
(2) the sodium hypochlorite dosing pump is manually controlled, when the residual chlorine in the factory water is lower than a set lower limit (less than 0.05mg/L), the stroke of the dosing pump is increased, the medicament is added into an inlet of the reservoir, and the detection frequency is increased; when the residual chlorine in the factory water is higher than the set upper limit (more than 0.09mg/L), the stroke of a dosing pump is reduced, the detection frequency is increased, and the residual chlorine in the factory water is ensured to be in a control range;
residual chlorine of the factory water is 0.04-0.10 mg/L;
the water plant is a water plant with the water supply radius less than 2 km;
(3) sampling and analyzing 2 times every day during the operation period of the water plant, and measuring the pH value (6.5-8.5), residual chlorine (0.04-0.10 mg/L) and turbidity (less than or equal to 1.0NTU) of factory water;
(4) the factory water and the pipe network tail water are sampled regularly and sent to a local disease prevention control center for detection, and detection items comprise microbial indexes such as escherichia coli and the like, toxicological indexes, sensory properties and general chemical indexes.
In the step (2), the sodium hypochlorite dosing pump is manually controlled, the stroke of the opening of the initial metering pump is 30%, when the residual chlorine of the effluent of the water plant is lower than the set lower limit, the stroke is increased by 5% of the opening of the metering pump every time, the agent is added into the inlet of the reservoir, and the detection frequency is increased; when the residual chlorine in the effluent of the water plant is higher than the set upper limit, the stroke is reduced by 3 percent of the opening of the metering pump each time.
According to the control mode of the domestic water sodium hypochlorite disinfection treatment, the method is mainly characterized in that the residual chlorine of the effluent of a centralized water supply plant with the water supply radius smaller than 2km is controlled, the residual chlorine of the effluent of the water supply plant can be controlled to be 0.04-0.10 mg/L by adjusting the addition amount of sodium hypochlorite, and microbial indexes, toxicological indexes, sensory properties, general chemical indexes and the like of escherichia coli and the like of the effluent of the water supply plant and the peripheral water of a pipe network meet the requirements of sanitary Standard for Drinking Water (GB 5749-2006).
The invention has the beneficial effects that:
the invention can reduce the residual chlorine of the water outlet of the water plant with the water supply radius less than 2km to the level of 0.04-0.10 mg/L, reduce the corrosion to the water supply pipeline of the living water and the harm of disinfection by-products to human bodies, and ensure that the microbial indexes, the toxicological indexes, the sensory properties, the general chemical indexes and the like of the water outlet of the water plant and the escherichia coli and the like of the living water at the periphery of the pipeline network meet the requirements of sanitary Standard for Drinking Water (GB 5749-2006).
Detailed Description
The present invention will be described in further detail with reference to examples.
Example (b):
(1) taking 10 barrels of sodium hypochlorite solution (the concentration of available chlorine is more than or equal to 10 percent and 25 kg/barrel), adding 250kg of the sodium hypochlorite solution into a metering box in total, processing industrial water to 600L, and preparing into 4.0-5.0 multiplied by 104And (3) starting a dosing pump to add the medicament when the water plant runs.
Sampling the factory water through a sampling tube, and respectively detecting the pH value, residual chlorine and turbidity of the domestic water by adopting a pH meter, a residual chlorine meter and a turbidity meter; the residual chlorine of the water at the end of the pipe network is detected by adopting a residual chlorine meter by sampling the water at the end of the pipe network. And taking a domestic water sample and sending the domestic water sample to a local disease prevention and control center for water quality detection.
(2) The sodium hypochlorite dosing pump is manually controlled, the stroke of the opening degree of the initial metering pump is 30 percent, when the effluent residual chlorine of the water plant is lower than the set lower limit (less than 0.05mg/L), the stroke is increased according to the opening degree of the metering pump of 5 percent each time, the medicament is added into the inlet of the reservoir, and the detection frequency is increased; when the residual chlorine of the water outlet of the water plant is higher than the set upper limit (more than 0.09mg/L), the stroke is reduced according to the opening of the metering pump of 3 percent each time, the medicament is added into the inlet of the reservoir, the detection frequency is increased, and the residual chlorine of the water outlet of the water plant is ensured to be in the control range.
(3) Sampling and analyzing 2 times every day during the operation of the water plant, measuring the pH value, the residual chlorine and the turbidity of the effluent of the water plant and the residual chlorine of the peripheral water of the pipe network, and measuring the pH value of the effluent of the water plant to be 7.20-7.80, the residual chlorine value to be 0.04-0.10 mg/L, the turbidity to be less than 0.60NTU, and the residual chlorine of the peripheral water of the pipe network to be more than or equal to 0.01mg/L, thereby meeting the control requirement.
(4) Factory water and pipe network peripheral water are sampled every 15 days and sent to a local disease prevention control center for detection, and detection items including microbial indexes such as escherichia coli and the like, toxicological indexes, sensory properties, general chemical indexes and the like all meet the requirements of sanitary standards for drinking water (GB 5749-2006).
According to the control mode of the domestic water sodium hypochlorite disinfection treatment, the method is mainly characterized in that the residual chlorine of the effluent of a centralized water supply plant with the water supply radius smaller than 2km is controlled, the residual chlorine of the effluent of the water supply plant can be controlled to be 0.04-0.10 mg/L by adjusting the addition amount of sodium hypochlorite, and microbial indexes, toxicological indexes, sensory properties, general chemical indexes and the like of escherichia coli and the like of the effluent of the water supply plant and the peripheral water of a pipe network meet the requirements of sanitary Standard for Drinking Water (GB 5749-2006).
Claims (2)
1. A small centralized water supply disinfection treatment method is characterized by comprising the following steps;
(1) sodium hypochlorite stock solution is taken and added into a metering box, and industrial water is prepared into 4.0-5.0 multiplied by 104Starting a dosing pump to add the medicament when a water plant runs;
sampling the factory water through a sampling tube, and respectively detecting the pH value, the residual chlorine and the turbidity of the factory water by adopting a pH meter, a residual chlorine meter and a turbidity meter; sampling the pipe network end to detect residual chlorine, and sending the pipe network end to a local disease prevention and control center for water quality detection;
(2) the sodium hypochlorite dosing pump is manually controlled, when the residual chlorine in the factory water is lower than a set lower limit, the stroke of the dosing pump is increased, a medicament is added into an inlet of the reservoir, and the detection frequency is increased; when the residual chlorine in the factory water is higher than the set upper limit, the stroke of a dosing pump is reduced, the detection frequency is increased, and the residual chlorine in the factory water is ensured to be in a control range;
residual chlorine of the factory water is 0.04-0.10 mg/L;
the water plant is a water plant with the water supply radius less than 2 km; (3) sampling and analyzing for 2 times every day during the operation period of the water plant, and determining the pH value, residual chlorine and turbidity of the factory water;
(4) and (3) regularly sampling the factory water and the pipe network tail water and sending the samples to a local disease prevention control center for detection, wherein the detection items comprise escherichia coli microorganism indexes, toxicological indexes, sensory properties and general chemical indexes.
2. The small centralized water supply disinfection treatment method according to claim 1, wherein in step (2), the sodium hypochlorite dosing pump is manually controlled, the stroke of the opening degree of the initial metering pump is 30%, the residual chlorine in effluent of a water plant is lower than the set lower limit of 0.05mg/L, the stroke is increased by 5% of the opening degree of the metering pump every time, the agent is added into the inlet of the reservoir, and the detection frequency is increased; the residual chlorine of the effluent of the water plant is higher than the set upper limit of 0.09mg/L, and the stroke is reduced according to the opening of the metering pump of 3 percent each time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463047.3A CN112777721A (en) | 2020-12-14 | 2020-12-14 | Small centralized water supply disinfection treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463047.3A CN112777721A (en) | 2020-12-14 | 2020-12-14 | Small centralized water supply disinfection treatment method |
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| CN112777721A true CN112777721A (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011463047.3A Pending CN112777721A (en) | 2020-12-14 | 2020-12-14 | Small centralized water supply disinfection treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583715A (en) * | 2022-12-08 | 2023-01-10 | 浙江浙能技术研究院有限公司 | Heat-engine plant cooling water bactericide adding system and operation method |
Citations (5)
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| CN201288084Y (en) * | 2008-10-29 | 2009-08-12 | 张明亮 | Automatic throwing-adding bearing duct system for sodium hypochlorite |
| US20100072144A1 (en) * | 2006-09-27 | 2010-03-25 | Tsugiyoshi Osakabe | Method of treating ballast water of ship |
| CN202099102U (en) * | 2011-04-22 | 2012-01-04 | 北京电子科技职业学院 | Residual chlorine control device for water sterilization |
| CN205773579U (en) * | 2016-07-05 | 2016-12-07 | 河南智慧水务有限公司 | Sodium hypochlorite medicine adding device |
| CN207877439U (en) * | 2017-12-26 | 2018-09-18 | 中原环保股份有限公司 | A kind of accurate medicine system of wastewater disinfection |
-
2020
- 2020-12-14 CN CN202011463047.3A patent/CN112777721A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100072144A1 (en) * | 2006-09-27 | 2010-03-25 | Tsugiyoshi Osakabe | Method of treating ballast water of ship |
| CN201288084Y (en) * | 2008-10-29 | 2009-08-12 | 张明亮 | Automatic throwing-adding bearing duct system for sodium hypochlorite |
| CN202099102U (en) * | 2011-04-22 | 2012-01-04 | 北京电子科技职业学院 | Residual chlorine control device for water sterilization |
| CN205773579U (en) * | 2016-07-05 | 2016-12-07 | 河南智慧水务有限公司 | Sodium hypochlorite medicine adding device |
| CN207877439U (en) * | 2017-12-26 | 2018-09-18 | 中原环保股份有限公司 | A kind of accurate medicine system of wastewater disinfection |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583715A (en) * | 2022-12-08 | 2023-01-10 | 浙江浙能技术研究院有限公司 | Heat-engine plant cooling water bactericide adding system and operation method |
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