Organic sewage constructed wetland processing and high-yield non-food energy plant cultivating technology

Abstract

The invention relates to an organic sewage constructed wetland processing and high-yield non-food energy plant cultivating technology, which is characterized in that the organic sewage is sent into a methane tank, an oxidation pond and a constructed wetland orderly to achieve the purpose of sewage purification, and simultaneously, the non-food energy plant is cultivated. The invention has the advantages that a buried type ABR system can be ensured to be in an intermediate-temperature fermentation state, the organic matter is digested quickly, and methane is produced with high yield; the methane is used for intensifying light, heating, increasing carbon dioxide fertilizer and enhancing photosynthesis for the system to produce the non-food energy plant with high yield; under the previous condition, plant seeds and energy plants on the oxidation pond (the stabilization pond) and the constructed wetland can grow quickly so as to obtain high yield and produce high-quality protein feed, and the normal growth and absorption of eutrophic substances in the sewage in winter can be ensured; simultaneously, purified reclaimed water is fully utilized; and the plants inside and outside the system grow quickly, a large amount of carbon dioxide is absorbed and utilized, and zero emission of sewage and methane is realized.

Description

Technical field [0001] The invention relates to the technical fields of environmental pollution control, renewable energy and circular economy. Background technique [0002] President Hu Jintao declared at the World Climate Change Conference that China should save energy and reduce emissions by 40% in response to climate change, and use new energy by 15%. To this end, we must vigorously develop the green economy, actively develop low-carbon economy and circular economy, research and promote climate-friendly technologies. [0003] The existing artificial wetland technology for treating organic sewage, especially domestic sewage, produces a wet room effect that is 21 times that of carbon dioxide of the same mass due to the unorganized discharge of methane generated by anaerobic digestion of organic matter. Plants absorb the nutrient-rich substances in the sewage and purify them, but there are still obvious defects: [0004] The existing constructed wetlands are all open-air ...

AI Technical Summary

Problems solved by technology

[0005] However, most of the above-mentioned plants grow well in surface flow constructed wetlands. With the advancement of technology, after the emergence of subsurface flow and vertical flow constructed wetlands that occupy relatively less land, some of them are not suitable for these plants. wetland grows

[0006] Among the above-mentioned plants such as cattail, canna, rush, and reed, it is reported that except windmill grass can grow normally in winter in southern China and continue to absorb nutrient-rich substances in sewage. Most of the other plants will stagnate in winter and even die. Ability to remove nutrient-rich substances in sewage

Moreover, these plants generally have low yields, and some rot in the water and pollute the water environment again.