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Method for controlling blackening and stinking of water bodies and sediments by sulfur control

A sediment and water body technology, applied in the direction of water pollutants, chemical instruments and methods, seawater treatment, etc., can solve the problems of reducing black odor, high repeatability of treatment cost, etc., to prevent black odor, reduce total amount and activity Effect

Inactive Publication Date: 2019-08-30
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional technical means such as sewage interception and dredging can reduce black and odor to a certain extent, the cost of treatment is high and repetitive

Method used

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  • Method for controlling blackening and stinking of water bodies and sediments by sulfur control

Examples

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Effect test

Embodiment 1

[0022] Example 1: Removal of sulfides in coastal black and odorous water

[0023] The black and odorous water body to be treated is a river course in Yantai, Shandong Province. Due to the increasing pollution in recent years, the water body is facing a serious situation of compound pollution. The COD of the water body is much higher than 100 mg / L, the sulfide concentration is about 5 mg / L, and the water body transparency is only About 3cm, the dissolved oxygen is only about 0.1mg / L, which is a typical urban black and odorous water body, and the odor pollution is particularly serious.

[0024] Specific process:

[0025] (1) Take water samples from different sections of the black and odorous river to be treated, and briefly analyze the content of various sulfur-containing substances in them, and the concentration of sulfides is about 5mg / L;

[0026] (2) Determine the dosage (10-50ppm) of the sulfur-controlling agent according to the content of sulfide (2-6mg / L);

[0027] (3) G...

Embodiment 2

[0031] Embodiment 2: industrial wastewater sulfate removal

[0032] Influent sulfate concentration is 2100-4000mg / L

[0033] (1) Add barium salt or calcium salt with a molar ratio of 1:1 to sulfate in the waste water to be treated, and then introduce it into the adjustment tank for stirring and mixing and static precipitation, so as to reduce the sulfate in the waste water to a certain extent and generate pollution The sludge enters the sludge thickening tank.

[0034] (2) The effluent from the previous stage is directly introduced into the microalgae biofilm rotary disk reactor, and the bacterium-algae symbiosis system of microalgae and microorganisms is used to further remove sulfate in the wastewater. The residence time of the water body is set to 2 days. The removal rate is above 45%. The treated wastewater can be discharged into open water bodies as water for landscape and greening, resulting in certain economic benefits.

Embodiment 3

[0035] Embodiment 3: method for removing black and odor of coastal deposits:

[0036] The black and odorous bottom mud (sediment) to be treated is a tidal flat at the estuary of a coastal river in Yantai, Shandong Province and an exposed riverbed in the intertidal zone of the river. Due to the continuous increase in coastal discharge pollution in recent years, the composite pollution situation of the bottom mud is severe, and the organic matter content exceeds 10%, the exposed riverbed and tidal flats are seriously black and smelly at low tide, which has a serious negative impact on the surrounding environment.

[0037] Along the river channel where the coastal black and odorous bottom mud is to be treated, the powder compounded with modified red mud and calcium nitrate is sprayed directly with spraying equipment at low tide, so that it is evenly distributed on the surface of the black and smelly bottom mud, and the spraying thickness varies. The degree of pollution in the are...

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Abstract

The invention relates to the field of water body and sediment pollution treatment in environmental engineering, in particular to a method for controlling blackening and stinking of water bodies and sediments by sulfur control. Through comprehensive control of source-process-terminal on various forms of sulfur-containing compounds in the environment, the process that the water bodies and the sediments become black and stink is effectively controlled.

Description

technical field [0001] The invention relates to the field of water body and sediment pollution control in environmental engineering, in particular to a method for preventing and controlling water body and sediment black and odor by controlling sulfur. Background technique [0002] With the continuous improvement of residents' living standards, people's requirements for living environment are also constantly provided. Due to the traditional custom of living by water, surface water bodies such as rivers and lakes have played a huge role in creating a hydrophilic environment. However, with the continuous increase of various types of pollution emissions, black and smelly urban water bodies have been seen everywhere, and have also attracted widespread attention from all walks of life. Black and smelly governance is urgent. At present, it is generally believed that black odor is caused by eutrophication of water body formed by excess organic matter and nitrogen and phosphorus. " ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/00C02F11/02C02F101/10C02F103/08
CPCC02F1/281C02F1/58C02F3/325C02F3/34C02F9/00C02F11/00C02F11/02C02F2101/101C02F2103/007C02F2103/08C02F2209/19C02F2303/02
Inventor 盛彦清赵国强姜明李兆冉
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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