Device for treating pig raising wastewater by using myriophyllum spicatum

Abstract

The invention relates to the field of sewage treatment. A device for treating pig raising wastewater by using myriophyllum spicatum comprises an adjusting sedimentation tank, wherein the adjusting sedimentation tank is sequentially communicated with a first-stage matrix tank, a second-stage matrix tank and a third-stage matrix tank; the third-stage matrix tank is sequentially communicated with a downward-vertical flow first-stage myriophyllum spicatum artificial wetland, a surface-flow second-stage myriophyllum spicatum artificial wetland, an upward-vertical flow third-stage myriophyllum spicatum artificial wetland and a surface-flow four-stage myriophyllum spicatum artificial wetland; the surfaces of the second-stagemyriophyllum spicatum artificial wetland and the four-stage myriophyllum spicatum artificial wetland are wave-shaped; myriophyllum spicatum is planted in each stage of myriophyllum spicatum artificial wetland; straw is put into each stage of matrix tank. The device can effectively enhance the tortuosity of a water flow and improves the treatment efficiency of the myriophyllum spicatum artificial wetlands.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a device for treating pig-raising wastewater by using foxtail algae. Background technique [0002] Foxtail algae, a perennial stout submerged herb with well-developed rhizomes, spreads in the bottom mud and takes root at the nodes. Stem cylindrical, much branched. The leaves above the water are alternate, lanceolate, stronger, bright green, with wider lobes. At present, it is used as a water purification tool species and a pioneer species of vegetation restoration in ecological restoration projects such as lakes, and it is used as bait, refuge and spawning place in the process of fish, shrimp and crab pond breeding. [0003] Constructed wetland is a ground similar to swampland that is artificially constructed and operated under control. Sewage is distributed to the artificially constructed wetland in a controlled manner. During the flow of sewage and sludge in a certain directio...

AI Technical Summary

Problems solved by technology

[0004] Pig wastewater due to COD, BOD 5 , ammonia nitrogen, etc. are high, the treatment cost is high, and the effect is often unsatisfactory

Foxtail algae has a very good effect on purifying water, but the current device that uses the foxtail algae artificial wetland to treat pig wastewater has too high a pollutant load; after the foxtail algae rots and decomposes, it affects growth and is easy to block; the constructed wetland has long-term After use, the treatment effect is reduced. When the temperature rises in summer, the foxtail algae will wither and die, and the treatment effect is not good.

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