A method to improve the removal rate of biogas slurry n, p and cod based on falling water ecological floating bed

Abstract

The invention discloses a method for increasing the N (Nitrogen), P (Phosphorus) and COD (Chemical Oxygen Demand) removal rate of biogas liquid based on a water-dropping ecological floating bed. The method comprises the following steps: constructing the ecological floating bed by adopting two species of plants, namely water hyacinth and canna, and stabilizing the plants for later use; putting 40L of biogas liquid in a liquid storage tank, and controlling flow rate by using a flowmeter to enable the biogas liquid to drop along a water dropping device; enabling dropping biogas liquid to flow into an ecological floating bed tank for plant and microorganism treatment; sampling at a water outlet, analyzing, and detecting the concentration of total nitrogen, total phosphorus and organic substances in outlet water. According to the method, water-dropping oxygenation and the ecological floating bed are adopted as two different wastewater treatment technologies; oxygen in air is transferred into water by dropping water, so as to maintain the normal metabolism of microorganisms in the water; the removal of nutritive salts such as nitrogen and phosphorus and organic substances, from the water is realized through the ecological floating bed, so that the biogas liquid treatment effect is improved effectively; the content of dissolved oxygen in sewage is increased, the operating method is simple, and the treatment cost is low.

Description

technical field [0001] The invention belongs to the technical field of biogas slurry treatment, and in particular relates to a method for improving the N, P and COD removal rates of biogas slurry based on a falling water ecological floating bed. Background technique [0002] The disposal of biogas slurry after anaerobic fermentation in the promotion and application of large and medium-sized biogas projects has become one of the important factors restricting its development. Biogas slurry is a high-concentration organic wastewater containing a large amount of nitrogen, phosphorus and organic matter. If the biogas slurry is not effectively treated and discharged at will, it will lead to the loss of nitrogen and phosphorus, causing serious environmental problems such as water eutrophication and agricultural non-point source pollution. Therefore, the effective treatment of biogas slurry is an urgent problem to be solved. [0003] The treatment of biogas slurry has the followin...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method for improving the removal rate of biogas slurry N, P, and COD based on the falling water ecological floating bed, aiming at solving the problems of large energy consumption, high cost and easy environmental pollution in the existing biogas slurry treatment method. pollution problem

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