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Method and device for producing drinking water through deep purifying by DMI and activated carbon composite bed

A deep purification and composite bed technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve problems such as insufficient utilization of water resources, unqualified water output during the cultivation period, and high equipment maintenance costs , to achieve the effect of low overall operating cost, fast filtering speed and reduced infrastructure cost

Pending Publication Date: 2017-10-03
星汉阿卡索环境科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the excessive treatment methods such as iron, manganese and arsenic, the manganese sand filtration treatment process was introduced from Japan 20 years ago to assist in increasing oxygen and aeration to remove heavy metals such as iron, manganese and arsenic; but manganese sand has a disadvantage, it can only remove Iron and manganese have a certain effect, but are ineffective against other heavy metals. In addition, manganese sand must be cultivated by bacterial film for 3 to 6 months, and some as long as one year, before it can remove part of iron and manganese. Cycle plant, only the effluent in the cultivation period is unqualified, and it is still used by residents
For the removal of heavy metals such as iron, manganese and arsenic, due to the rapid development of membrane technology in recent years, some people use reverse osmosis membranes or nanofiltration membranes for treatment, but due to high treatment costs and high equipment maintenance costs, it is difficult for most waterworks Promotion, and the use of reverse osmosis membrane or nanofiltration membrane, the water produced is basically pure water, does not contain other nutrients needed by the human body, does not belong to healthy drinking water, long-term drinking is not beneficial to the human body
Moreover, the water production rate of the membrane filtration process is about 70%, and the water resources cannot be fully utilized, resulting in waste of water resources

Method used

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  • Method and device for producing drinking water through deep purifying by DMI and activated carbon composite bed
  • Method and device for producing drinking water through deep purifying by DMI and activated carbon composite bed

Examples

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Effect test

Embodiment 1

[0036] The method for deep purification of DMI and active carbon composite bed to produce drinking water of the present invention, when processing raw water is underground water, realizes by following steps:

[0037] a. Sterilization and antivirus: add oxidant to raw water;

[0038] b. Arsenic removal: Add soluble iron-based compounds to the water, and the amount of addition depends on the amount of arsenic in the water;

[0039] c. Removal of heavy metals: In the raw water where oxidants exist, through the adsorption and separation of mineral adsorbent DMI, the heavy metals in the water are adsorbed and removed in the form of hydroxide particles. The removal rate of heavy metals is over 99.8%. Hardness above 30%;

[0040] d. Activated carbon adsorption and refining: use activated carbon to absorb and remove residual organic matter, bacteria, viruses, residual heavy metals and free chlorine in the water, so as to obtain fully compliant, pure, healthy and palatable drinking wa...

Embodiment 2

[0043] The method for deep purification of DMI and active carbon composite bed to produce drinking water of the present invention, when the raw water is treated as surface water, is realized through the following steps:

[0044] a. Removal of mechanical impurities: filter the raw water with a grid filter to remove mechanical impurities;

[0045] b. Flocculation and turbidity reduction: add flocculant and stir rapidly to form insoluble substances from impurities in the water, carry out precipitation and separation, and reduce water turbidity.

[0046] c. Sterilization and antivirus: add oxidant to raw water;

[0047] d. Arsenic removal: add soluble iron-based compounds, such as ferrous sulfate, to the water, and the amount of addition depends on the amount of arsenic in the water;

[0048] e. Removal of heavy metals: In the raw water where oxidants exist, through the adsorption and separation of mineral adsorbent DMI, the heavy metals in the water are adsorbed and removed in t...

Embodiment 3

[0052] DMI of the present invention and the method for deep purification of activated carbon composite bed to produce drinking water specifically comprise the following steps:

[0053] 1. Use the grid to intercept the large solid suspended solids in the water, such as weed leaves, plastic bags and other objects; then pump the water into the sedimentation tank, quickly stir and settle through the flocculant, and assist oxygen aeration and other means to remove the organic matter in the water Precipitation to achieve preliminary purification of water; groundwater does not need this process because it is relatively clear;

[0054] 2. For underground water sources, most of the existing waterworks in my country need the process of flocculation and sedimentation, because the organic matter in groundwater must be removed through this process, and the quartz sand or manganese sand filter at the back end cannot remove organic matter, and the present invention does not need this process ...

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Abstract

The invention provides a method and a device for producing drinking water through deep purifying by a DMI and activated carbon composite bed, and belongs to water treatment methods and devices. The method comprises the following steps: sterilizing and disinfecting; removing arsenic; removing heavy metal; and absorbing with activated carbon to remove organic substances, bacteria, virus left in water, and residual heavy metal and free chlorine, thus obtaining the drinking water which comprehensively meets the standard, and is pure and clean, healthy and tasty. The device comprises a raw water pump, an activated carbon absorbing separating device, etc. With the adoption of the method and the device, the efficiency of removing heavy metal such as iron, manganese and arsenic is high, and the removing rate is more than 99.8%; the heavy metal index of the drained water is below 0.01 ppm, which is beyond the current international standard of drinking water; no wastewater is drained, except the backwashing wastewater; and the backwashing is intermittently carried out at fixed period, and the backwashing wastewater accounts for 2% of the total water inlet quantity. Therefore, the water production rate is high; and the water resource can be saved.

Description

technical field [0001] The invention belongs to a water treatment method and a device, in particular to a method and a device for deep purification of a DMI and activated carbon composite bed to produce drinking water. Background technique [0002] According to data released by the Ministry of Water Resources in 2016, 70% of my country's groundwater and surface water are polluted to varying degrees, and the types of pollutants vary in different regions. The main pollutants are excessive heavy metals, excessive chemical substances, excessive fluorine, etc., as well as excessive iron in pipe network pollution, which seriously threatens people's life and health, especially excessive heavy metals, which are the main cause of cancer. Iron, manganese, and arsenic are indispensable trace elements for the human body. However, excessive iron and manganese entering the human body will seriously endanger human health. According to relevant reports and "China Environmental Protection E...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F9/04C02F101/10C02F101/20
CPCC02F1/281C02F1/283C02F9/00C02F2101/206C02F2101/103C02F2101/20C02F2101/203C02F2303/04C02F1/72C02F1/50
Inventor 齐龙郑亚青赵雨胡必成王鹰瀚
Owner 星汉阿卡索环境科技(北京)有限公司
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