Emergency handling method for paroxysmal representative heavy metal pollution of water source of city

An emergency treatment and heavy metal technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., to achieve strong reliability, ensure water supply, and strong operability

Inactive Publication Date: 2009-01-14
TONGJI UNIV
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Problems solved by technology

At present, domestic and foreign studies on sudden pollution of drinking water sources are mainly focused on early warning and assessment, and emergency plans for water supply cities are mostly focused on considering the optimal dispatch of multiple water sources and multiple pumping stations to avoid the impact of pollution. Polluted water sources or reducing

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  • Emergency handling method for paroxysmal representative heavy metal pollution of water source of city
  • Emergency handling method for paroxysmal representative heavy metal pollution of water source of city
  • Emergency handling method for paroxysmal representative heavy metal pollution of water source of city

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Embodiment Construction

[0046] The technical scheme of the present invention will be further described below in conjunction with a semi-annual pilot test carried out in a certain water plant.

[0047] (1). Emergency technology for sudden pollution of pentavalent arsenic

[0048] For sudden As(V) pollution, the specific plan:

[0049] 1) Polymerized ferric sulfate is used as the coagulant, the coagulation time is controlled at 15-20min, and the dosage of the coagulant is 4-12mg / L, depending on the degree of pollution, as shown in Table 1. When the concentration of pollutants is at When the two pollutant concentration levels listed in Table 1 are between, the treatment method should adopt the treatment method corresponding to the higher pollutant concentration level.

[0050] 2) The filtration rate is controlled at 8m / h, and the initial water of the filter tank is discharged. The turbidity can be used as an investigation index. According to the actual adjustment ability of the clear water tank in the ...

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Abstract

Disclosed is an emergency treatment method of sudden typical heavy metal pollution of city water-supply source, comprising: measuring the content of heavy metal in raw water, putting a coagulant into the raw water when the concentration exceeds a certain numerical value; controlling the filtering velocity at a proper numerical value and setting down a drainage closing time point of initial filter water; and back flushing in a filter chamber. The method aims at three typical heavy metal pollutants of arsenic (As), plumbum (Pb) and cadmium (Cd) and is an emergency treatment technique developed on the basis of the general water treatment process (namely, coagulation, precipitation, filtration and sterilization) flow, and has rather broad applicable range and strong utility value; and secondly, the method can maximally reduce the time of water supply stopping; and has strong reliability, and can well control the three typical heavy metal pollutants of arsenic (As), plumbum (Pb) and cadmium (Cd), and can also properly control other water quality indexes such as turbidity degree, COD(Mn), disinfection by-products, total manganese, total iron, total aluminum and pH value.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a water purification technology emergency treatment technology proposed for sudden heavy metal pollution of urban water supply sources and applicable to water purification plants. Background technique [0002] In recent years, there have been many major heavy metal sudden pollution incidents in many rivers and basins in my country, which directly endanger the drinking water sources of cities and cause many social problems that residents have no water to drink. For example, on December 15, 2005, the Guangdong Beijiang cadmium pollution incident caused pollution of drinking water sources in Guangzhou, Foshan, Qingyuan and other places. In January 2006, the cadmium pollution incident in the Xiangjiang River in Hunan caused difficulty in drinking water in Xiangtan, Changsha, Zhuzhou and other places. On September 8, 2006, a sudden incident of arsenic pollution in drinking water occurred...

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Application Information

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IPC IPC(8): C02F1/62C02F1/52
Inventor 姚娟娟高乃云夏圣骥陈蓓蓓
Owner TONGJI UNIV
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