Improved method for enhancing ammonia nitrogen removal effect of constructed wetland by using wetland harvested bamboo reeds
A constructed wetland and ammonia removal technology, applied in chemical instruments and methods, other chemical processes, biological water/sewage treatment, etc., can solve the problems of low dissolved oxygen level and poor denitrification effect, and achieve enhanced growth and reproduction and nitrification reaction. , long use time, no secondary pollution effect
Active Publication Date: 2013-08-21
SOUTHWEST UNIVERSITY
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[0008] Aiming at the poor denitrification effect of traditional artificial wetlands, low dissolved oxygen levels, and the disposal of wetland plants after harvesting, the present invention provides a method for using wetland harvested Arundos arundoides to strengthen artificial wetlands to remove ammonia nitrogen
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[0031] The wetland type of the present invention is subsurface flow or surface flow artificial wetland, including pool body 1, water inlet and outlet system, wetland matrix filled in the pool body, and wetland plant Arundis 2 planted on the matrix. The Arundis biochar material is obtained through processing, and then the Arundis biochar material is used as a wetland matrix to backfill into the pool body. The wetland matrix is divided into a three-layer structure, which is the bottom layer 3, the middle layer 4 and the surface layer 5 from bottom to top. The carbon material is 30-50% of the total volume of the wetland matrix.
[0032] Wherein the process of obtaining the Arundos reeds biochar material through carbonization treatment is as follows:
[0033] (1) Raw material preparation: wash the harvested reed bamboo stalks, cut them to 4-5 cm, and dry them for later use;
[0034] (2) Pretreatment of reed bamboo straw: add the reed bamboo straw obtained in step (1) into the ...
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The invention discloses an improved method for enhancing ammonia nitrogen removal effect of a constructed wetland by using wetland harvested bamboo reeds. The constructed wetland comprises a tank body, a water inlet and outlet system, a wetland substrate and wetland plants (bamboo reeds), wherein the bamboo reeds are harvested and then subjected to carbonization treatment (being subjected to irenine pretreatment before carbonization) to obtain a bamboo reed biomass charcoal material; the biomass charcoal material is used as a wetland substrate and filled back into the tank body; the wetland substrate sequentially comprises a bottom layer, a middle layer and a surface layer from bottom to top; and the biomass charcoal material is arranged in the middle layer. The method enhances the NH4<+>-N removal effect in sewage, causes no secondary pollution, can effectively lower the construction and operating cost of the traditional constructed wetland, has the characteristics of stable water treatment effect and the like, and can buffer the impact of water power and pollution load. The invention solves the problem that the harvested wetland plants cause secondary pollution to the environment in case of improper treatment, effectively enhances the NH4<+>-N removal effect of the wetland and realizes the reutilization of the wetland plants.
Description
technical field [0001] The invention belongs to the field of water treatment, and in particular relates to an improved method for removing ammonia nitrogen by using wetland harvesting of reed bamboo to strengthen artificial wetland. [0002] Background technique [0003] Constructed wetland is based on the principle of natural wetland purification of sewage, with natural wetland technology as the main body, combined with the action of substrate, microorganisms and plants, to construct an ecological restoration system with the advantages of low investment, simple management, and low operating costs. After nearly 40 years of development, constructed wetlands, as a potential wastewater denitrification technology, have been widely used at home and abroad. [0004] Traditional constructed wetlands mostly use self-flowing water inflow, and the dissolved oxygen in the wetland mainly comes from the contact between the water surface and the air and the oxygen secretion of plant root...
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Login to View More IPC IPC(8): C02F3/32B01J20/20C02F101/16
CPCY02W10/10
Inventor 黄磊高旭杜刚鲁言言常宝军郭劲松
Owner SOUTHWEST UNIVERSITY