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Method for treating micro-polluted water

A treatment method and micro-polluted water technology, applied in the field of water treatment, can solve problems such as membrane fouling

Inactive Publication Date: 2018-06-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a major disadvantage of membrane methods is membrane fouling

Method used

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  • Method for treating micro-polluted water

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Embodiment Construction

[0009] Below the embodiment of the present invention is described in detail: present embodiment implements under the premise of technical scheme of the present invention, has provided detailed implementation, but protection scope of the present invention is not limited to following embodiment.

[0010] (1) Acidified attapulgite should be made of high-quality attapulgite clay soil, acidified by adding water and sulfuric acid, and the specific weight percentages are as follows: 50-60% attapulgite clay, 30-50% water, 98% sulfuric acid 1-5%, fully stir and mix evenly. The attapulgite after acidification should be dried, the drying temperature should be controlled at 120-160°C, and the moisture content after drying should be ≤3%.

[0011] (2) Add 0.5g / L acidified attapulgite clay to the raw water (taken from Taihu Lake water), and start the mechanical stirring device for 5-15 minutes before filtering.

[0012] (3) The pressure of the filtered water sample is 0.1MPa, using 0.2m 2 ...

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Abstract

The invention relates to a method for treating micro-polluted water, and provides the method for treating the micro-polluted water by using attapulgite clay as an adsorbent for carrying out pretreatment and coupling with membrane separation. Through the pretreatment of adding the attapulgite clay into a membrane feeding solution, so that COD (Chemical Oxygen Demand), nitrogen, phosphorus, turbidity and contents of various organic matters in the micro-polluted water can be remarkably reduced, the concentration of heavy metal ions in water can be reduced, a function of reducing membrane pollution can be achieved, membrane flux can be improved, and high-quality water can be more easily obtained. A certain amount of acidified attapulgite clay is firstly added in raw water in a water inlet tank1 in advance, a mechanical stirring device can be simultaneously started, suction can be carried out through a booster pump 3, the pressure is controlled to be 0.1MPa, and then separation is carriedout through a membrane assembly 4 (a hollow or flat sheet membrane); during a process, backwashing valves 10 and 11 and a backwashing water outlet valve 13 can be switched off, water inlet valves 5 and 7 and a water outlet valve 9 can be switched on, and differential pressure of a membrane can be read through pressure gauges 6 and 8 arranged on two ends of the membrane assembly.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for treating slightly polluted water. technical background [0002] Slightly polluted water source means that the physical, chemical and microbiological indicators of the water can no longer meet the water quality requirements for drinking water source water in the "Environmental Quality Standards for Surface Water". Individual indicators of pollutants in water bodies, such as turbidity, color, odor, sulfide, nitrogen oxides, harmful and toxic substances (such as heavy metals Hg, Mn, Cr, Pb, As, etc.), pathogenic microorganisms, etc., have exceeded the standard, but In most cases, it is a water source polluted by traces of organic matter. The phenomenon of micro-pollution of water body has caused great difficulties to the selection of drinking water treatment process. Even after being treated by the water plant, the taste of drinking water is still very bad; after drinki...

Claims

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Application Information

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IPC IPC(8): C02F9/02
CPCC02F1/281C02F1/44C02F1/444C02F2209/03C02F2303/14
Inventor 魏永马琦琦姚维昊江晓东赵威
Owner CHANGZHOU UNIV