Method for treating contaminated tidal river reach mud cake

A river section and tidal sensing technology, applied in the field of environmental pollution control, to improve the floating situation of mud skin, improve the effect of algae killing and persistence

Inactive Publication Date: 2018-08-10
广州益禄丰生态环保科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no reports on the comprehensive control of mud flooding in

Method used

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  • Method for treating contaminated tidal river reach mud cake
  • Method for treating contaminated tidal river reach mud cake
  • Method for treating contaminated tidal river reach mud cake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The governance object of the present embodiment is the Shilu Jiechong Landscape River in the Zhujiang River System of Guangzhou City in summer and autumn, and the total length of the river is 5 kilometers.

[0045] The treatment method of polluted tidal river section mud skin provided by the invention comprises the following steps:

[0046] (1) On-site monitoring and collection of sediment samples from the polluted tidal river section for detection, and calculation of the oxygen demand SOD for the surface treatment of the sediment surface according to the composition and content of the surface caking material. After the calculation, set the bottom improvement The oxidant composition and its content in the agent.

[0047] According to the on-site investigation of the river, its main indicators before treatment are: dissolved oxygen in water is 0.25-0.35mg / l, pH6.6-7.1, TDS265-390mg / l, transparency is about 25cm, COD85-185mg / l, When the tide is low, the oxidation-reducti...

Embodiment 2

[0082] The object of treatment of the present embodiment is the section of the Tangxiayong River in Guangzhou City, a tributary of the Pearl River system, with a total length of 3 kilometers. Under the environmental conditions of winter and spring (environmental temperature 10-20° C.), experimental verification treatment is carried out.

[0083] The method provided by this embodiment is basically the same as that of Example 1, the difference being that, according to the situation of on-site sampling, the specific medicaments and their dosages are different:

[0084] (1) Due to the high degree of pollution of the sediment and the low oxidation-reduction potential, the anaerobic process produces a large amount of gas, especially odorous gas, which has a large degree of environmental impact. In response to this situation, the pollution control and transformation of the substrate should be carried out first. After low tide and when the bottom mud is exposed, take 7.5g of potassium...

Embodiment 3

[0089] This embodiment is basically the same as Embodiment 1 and 2, and its difference is:

[0090] The oxidant combination is: the consumption of sodium percarbonate or potassium persulfate is 1g, the consumption of calcium hydroxide or calcium peroxide is 35g; the consumption of slow-release agent zeolite powder is 20g;

[0091] Algicide is that the consumption of isothiazolinone or potassium permanganate is 70g, the consumption of adhesive biochar is 10g, and the consumption of bentonite is 25g;

[0092] The amount of flocculant aluminum sulfate or anhydrous ferric chloride is 1g.

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Abstract

The invention discloses a method for treating contaminated tidal river reach mud cake. The method comprises the following steps: (1) onsite monitoring, collecting and detecting a contaminated tidal river reach sediment sample; (2) taking a quantitative amount of an oxidant, preparing a sediment modifier, and uniformly sprinkling the sediment modifier on an ebbed exposed riverbed after tide ebbingin order to form a first covering layer; (3) collecting and detecting a water sample at the contaminated tidal river reach mud cake; (4) taking a quantitative amount of an algicide, preparing a powderfrom the algicide, and uniformly sprinkling the powder on an exposed riverbed to form a second covering layer; and (5) mutually cooperating the first covering layer with the second covering layer toachieve continuous proceeding of surface oxidation and alga killing effects of sediment, ,digest original sediment skin cakes and continuously prevent the surface of the sediment from forming cakes. The method enhances the sediment modifying and alga killing effects through the mutual synergistic enhancement effect of the covering layers by using the tide rising and tide ebbing opportunity of thecontaminated tidal river reach in order to make the contaminated river reach rapidly and lastingly treated.

Description

technical field [0001] The invention relates to a method for treating environmental pollution, in particular to a method for treating mud in polluted tidal river sections. Background technique [0002] The tidal river section refers to the river section from the estuary to the tidal zone boundary, which is affected by ocean tides, causing significant periodic changes in the salinity, water level, and flow velocity of the river water. In coastal cities, due to their close proximity to the ocean, most rivers are tidal. In such rivers, the common environmental pollution includes the problem of mud flooding in addition to the problem of black and smelly rivers. [0003] The film-like floating mud (mud skin) floating in the urban landscape water body not only affects the water body landscape, but also hinders the oxygen in the air from being transmitted to the water body, affecting the water quality. On the surface of the water body, it is easy to be blown to a local area by th...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F1/52C02F101/30
CPCC02F1/5236C02F11/00C02F2101/30C02F2103/007
Inventor 张太平郝莺飞程扬沈启斌李彦培扈华庚
Owner 广州益禄丰生态环保科技有限责任公司
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