Emergency handling process for sudden burst of raw material alga

An emergency treatment and raw water technology, applied in the direction of adsorption water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as poor emergency algae removal efficiency, poor treatment effect, and aggravated water pollution , to achieve ideal removal effect, low cost of use and simple process

Inactive Publication Date: 2008-03-05
济南市供排水监测中心
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, due to a large number of untreated point source and non-point source pollutants entering the surface water body, the eutrophication of the water body is becoming more and more serious, and the overgrowth of algae leads to a sharp increase in algae and their metabolites in the water source, which is critical for the safe operation of the water plant. It has a relatively large impact, leading to a decline in the quality of urban water supply and a potential threat to the health of users
[0003] The traditional raw material water purification process is generally coagulation-sedimentation-filtration-disinfection. This process has poor treatment effect on algae and their metabolites in water. Although coagulation can remove some algae, the destruction of algae leads to more Intracellular substances enter the water, which aggravates the water pollution. In the emergency situation of high incidence of algae, the shortcomings of the conventional treatment process are even more exposed.
The current emergency treatment process to deal with the high incidence of algae requires high-efficiency purification equipment, a large site, and a large amount of funds. The pre-chlorination process usually used has limited oxidation capacity, poor emergency algae removal efficiency, and will produce "three causes" (carcinogenic Chlorinated disinfection by-products

Method used

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  • Emergency handling process for sudden burst of raw material alga

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0014] The field experiment was conducted with a water supply of 230,000m 3 / d's Jinan Yuqing water plant.

[0015] As shown in Figure 1, the present embodiment adopts the following steps: 1) take water from the water intake of the water source, add chlorine dioxide pre-oxidation: the dosage is 1mg / L, and send it to the distribution well of the water plant; 2) from the distribution well Fetching water, adding powdered activated carbon adsorption dosage is 10mg / L; 3) remixing: adding polyaluminum ferric chloride, dosage is 5.9mg / L, using pipeline mixer to mix; 4) Reaction: ordinary reaction tank ;5) Sedimentation: Advection pool, the length of the pool is 100m, and the residence time is 2.2h; 6) Filtration: Filtration rate is 10m / h, air and water recoil, air impact intensity is 70m 3 / h·m2, the water flushing intensity is 13m 3 / hm 2 ; 7) Disinfection: Chlorine disinfection, the dosage is 3mg / L, input into the clear water pool, and then sent to the water supply pipe network...

specific Embodiment 2

[0016] The field experiment was conducted with a water supply of 230,000m 3 / d's Jinan Yuqing water plant.

[0017] As shown in Figure 1, the present embodiment adopts the following steps: 1) take water from the water intake of the water source, add chlorine dioxide pre-oxidation: the dosage is 2mg / L, and send it to the distribution well of the water plant; 2) from the distribution well Take water, add powdered activated carbon for adsorption, the dosage is 20mg / L; 3) remix: add polyaluminum ferric chloride, the dosage is 5.9mg / L, and mix with pipeline mixer; 4) Reaction: folding plate Reaction pool; 5) Sedimentation: Advection pool, pool length 120m, residence time 2h; 6) Filtration: V-shaped filter, filtration rate 8m / h, air-water recoil, air impact intensity 55m 3 / h·m2, the water flushing intensity is 11m 3 / h·m 2 ; 7) Disinfection: Chlorine disinfection, the dosage is 2.7mg / L, input into the clear water pool, and then sent to the water supply network.

specific Embodiment 3

[0018] The field experiment was carried out in Jinan Yuqing Water Plant with a water supply of 230,000 m3 / d.

[0019] As shown in Figure 1, this specific embodiment adopts the following steps: 1) take water from the water intake of the water source, add chlorine dioxide pre-oxidation: the dosage is 4.5mg / L, and send it to the distribution well of the water plant; Take water from the well, add powdered activated carbon for adsorption, and the dosage is 40mg / L; 3) remix: add polyaluminum ferric chloride, the dosage is 5.9mg / L, and mix with a pipeline mixer; 4) Reaction: folding Plate reaction pool; 5) Sedimentation: advection pool, pool length 120m, residence time 2h; 6) Filtration: V-shaped filter, filtration rate 8m / h, air-water recoil, air impact intensity 55m 3 / h·m2, the water flushing intensity is 11m 3 / h·m 2 ; 7) Disinfection: Chlorine disinfection, the dosage is 3.4mg / L, input into the clean water pool, and then sent to the water supply pipe network.

[0020] The wat...

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Abstract

The emergency treatment process for material water with water bloom includes the following steps: 1. throwing chlorine dioxide in the amount of 0.5-5.0 mg/l for pre-oxidation; 2. adding active carbon powder in 5-50 mg/l for adsorption; 3. adding flocculant polyferric aluminum chloride to react, and filtering after precipitation; and 4. sterilizing with chlorine in 2.5-3.5 mg/l. The process has excellent algae, algal poison and arene eliminating capacity, ideal permanganate index eliminating effect, simple technological process and low cost, and is suitable for emergency treatment for material water with water bloom.

Description

(1) Technical field [0001] The invention relates to an algae emergency treatment process, which is used for the emergency treatment when the raw material water algae in the urban water supply industry explodes suddenly. (2) Background technology [0002] At present, due to a large number of untreated point source and non-point source pollutants entering the surface water body, the eutrophication of the water body is becoming more and more serious, and the overgrowth of algae leads to a sharp increase in algae and their metabolites in the water source, which is critical for the safe operation of water plants. There is a relatively large impact, which leads to the decline of urban water supply water quality and poses a potential threat to the health of users. [0003] The traditional raw material water purification process is generally coagulation-sedimentation-filtration-disinfection. This process has poor treatment effect on algae and their metabolites in water. Although coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/76C02F1/28C02F1/52C02F1/50
Inventor 贾瑞宝陈家全孙韶华周维芳
Owner 济南市供排水监测中心
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