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Method for treating wastewater by green constructed wetland comprising livestock waste

A technology of livestock manure and constructed wetlands, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of inability to meet the degradation of a large number of pollutants, low amount of oxygen carried by influent water, insufficient degradation capacity, etc. problems, to achieve the effect of avoiding high replacement costs, increasing product added value, and improving adsorption and degradation capabilities

Inactive Publication Date: 2016-10-05
ANHUI UNIVERSITY OF ARCHITECTURE +1
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Problems solved by technology

[0005] At the same time, judging from the existing technical practice, the amount of oxygen carried by the influent water in the constructed wetland system is low, the ability of atmospheric reoxygenation and plant root system oxygen release is limited, and the aerobic degradation of organic matter in sewage and the nitrification process of denitrification require sufficient oxygen. Oxygen, so the dissolved oxygen in the constructed wetland cannot meet the needs of the degradation of a large number of pollutants, limiting the nitrification reaction of organisms
Therefore, there is an urgent need for a new constructed wetland to solve the problem of insufficient degradation capacity.

Method used

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Embodiment Construction

[0026] A method for treating waste water in a green artificial wetland containing livestock excrement, comprising the following steps:

[0027] (1) Sewage enters the grid tank to remove large particles of suspended solids and debris;

[0028] (2) The pretreated wastewater enters the vertical flow constructed wetland for further treatment, and the multilayer filler of the constructed wetland contains treated livestock manure;

[0029] (3) The treated sewage is recycled after further treatment by conventional processes;

[0030] The multi-layer fillers of the vertical flow artificial wetland are as follows from top to bottom: sandy soil covering layer, perlite layer, aerobic brick powder granular layer, blast furnace slag layer; calamus is planted on the sandy soil covering layer;

[0031] The sand covering layer is composed of fine sand with a particle size of 1-5mm and treated livestock manure in a ratio of 8:1;

[0032] The treatment method of the livestock feces is as foll...

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Abstract

The invention discloses a method for treating wastewater by a green constructed wetland comprising livestock waste. Multilayer filler of a vertical flow constructed wetland includes: a sandy soil covering layer, a perlite layer, an aerated brick powdery particle layer and a blast furnace slag layer sequentially from top to bottom; Acorus calamus is planted on the sandy soil covering layer; the sandy soil covering layer is formed of fine sand 1-5 mm in particle size and treated livestock waste according to a ratio of 8:1-2; a method of treating livestock waste includes: after composting the livestock waste, sterilizing at 80-100 DEG C, drying, grinding, adding peat 10-20% by weight of the livestock waste, and granulating to form particles 1-5 mm in particle size to obtain the treated livestock waste.

Description

technical field [0001] The invention relates to the field of artificial wetlands, in particular to a method for treating waste water in green artificial wetlands containing livestock manure. Background technique [0002] Constructed wetland is a sewage treatment technology developed in the 1970s. It can treat domestic sewage, industrial and agricultural sewage. It has the advantages of remarkable purification effect, low construction and operation costs, and easy management. It is especially suitable for domestic sewage treatment in small cities. In recent years more and more people's attention. The purification mechanism of constructed wetlands includes microbial degradation, plant absorption and assimilation, and physical and chemical effects of substrates, among which microorganisms play a key role in the purification of sewage by constructed wetlands. [0003] Constructed wetland is a ground similar to swampland that is artificially constructed and operated under contro...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34
CPCC02F3/32C02F3/34Y02W10/10
Inventor 唐建设黄显怀张勇王坤曹梓凯李军周超吴梦珂许明新
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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