Ecological dredging recycling method

Abstract

The invention relates to an ecological dredging recycling method. The method is realized in the following steps: sediment is pretreated, sediment organic liquid fertilizer is fermented, a bacterial sediment liquid is added to a lake, reservoir or river to be used as a microbial strain, a nutrient solution or a concentrated nutrient solution passes through an aeroponic cultivation system, a residual plant absorption liquid is obtained through absorption of nutrient substances by plants, bacterial sediment is flavored by a flavoring agent, mycoprotein feed is prepared, and an alga liquid is obtained through alga culture of the residual plant absorption liquid; an alga culture container is made of a high-transmittance high-polymer hard material; algae comprise green algae and diatom; the culture period lasts 48-72 h; the illumination intensity is 3,000-7,000 LX, and the illumination time lasts 48-72 h; the obtained mycoprotein and the alga liquid enter a high-efficiency bioreactor via a feed adding system and a pipeline, residual feed and excrement of all aquatic organisms in the high-efficiency bioreactor are collected and dewatered and then enter an organic fertilizer fermentation system for fermentation recycle, and aquiculture water is directly discharged into a water body after being disinfected by a biological purification system in the high-efficiency bioreactor.

Description

technical field [0001] The invention relates to an ecological dredging resource recovery method. Background technique [0002] Sediment pollution of water bodies is a worldwide environmental problem. Sediment is usually the reservoir of pollutants such as nutrients, refractory organic matter, and heavy metals in rivers and lakes. Most of the polluted sediment is the main source of pollution for the water body where it is located. The concentration of N and P pollutants contained in bottom mud sediment and interstitial water is much higher than that contained in the overlying water. Under certain conditions, these substances are released into the water body, thereby destroying the ecosystem of the water body. The common sediment pollution control treatment and remediation technologies are generally exogenous pollution control, physical remediation, chemical remediation, and biological remediation. Exogenous pollution control is to cut off pollution sources, but it is relati...

AI Technical Summary

Problems solved by technology

This method consumes a lot of energy, does not consider the harmful gas generated by combustion, and is not very popular; the application number is 201010165633. Sludge, use light-assisted Feton technology to remove heavy metal pollutants and organic pollutants in the contaminated bottom mud slurry; sludge is used for solid waste harmless treatment, and for sludge with high sedimentary components of aquatic plants, it is used as a sludge fuel for development. Sludge with a high content of sand and gravel is used as a building material for the production of cement, ceramsite or landscape bricks

These two methods are not efficient in remediating sediment pollution, and will cause secondary pollution. The hidden danger of endogenous release of sediment pollution still exists and cannot be completely solved.