Agricultural drain denitrifying phosphorus uptake simulation device

Abstract

The invention discloses an agricultural drain denitrifying phosphorus uptake simulation device, which comprises a water distribution unit (A), a reaction unit (B) and a water outlet unit (C), wherein the water distribution unit (A) is used for preparing and storing raw water and controlling flow rate of inlet water entering the reaction unit B so as to control reaction time; the reaction unit (B) is a main treatment unit; denitrifying phosphorus uptake reaction is performed in the reaction unit (B); and the water outlet unit (C) is used for water outlet of the agricultural drain denitrifying phosphorus uptake simulation device and adjusting water level of the agricultural drain denitrifying phosphorus uptake simulation device by adjusting opening and closing of water outlet valves at different heights. By using the device, an actual condition of agricultural drain is simulated, and variation conditions of nutritive substances of N and P are monitored, so that a series of technical parameter such as design trench length, carbon source adding amount and the like are obtained, and long-term technical support is provided for technical field construction.

Description

technical field [0001] The invention belongs to the field of agricultural environmental protection, and in particular relates to a novel farmland drainage denitrification phosphorus absorption simulation device. Background technique [0002] The control of nitrogen and phosphorus loss in farmland drainage has become the current worldwide focus of "agricultural ecological stability and water environment security". Farming activities inevitably produce a large amount of farmland drainage, causing a large amount of nitrogen and phosphorus to be discharged into water bodies from ditches, causing eutrophication. Many studies have found that it is difficult to completely solve this problem by relying solely on water and fertilizer management strategies. Farmland drainage ditches are widely distributed in rural areas of my country, and the ditches system can be defined as "linear" shallow wetlands in the sense of ecological environment, which greatly affects the migration and tran...

AI Technical Summary

Problems solved by technology

However, ecological concrete slope protection technology also has defects, including easy clogging, concrete durability, concrete alkalinity, lack of nutrients, and weak capillary water supply in pores.

[0004] It can be seen that the comprehensive utilization level of farmland drainage ditches is relatively low at present. How to combine the characteristics of the material cycle of the agricultural production system to develop new substrates for intercepting nitrogen and phosphorus in ditches has become a key bottleneck in the construction and promotion of farmland ecological ditches.

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