Blue algae slurry dewatering process method

Abstract

The invention relates to a method for dewatering blue-green algae slurry by utilizing a horizontal spiral discharge sedimentary centrifuge, so as to change liquid phase algae slurry into a quasi solid phase algae cake, and enable the volume thereof to be greatly reduced. The invention belongs to the environmental protection technology field. The invention is characterized in that the blue-green algae slurry to be dewatered is pumped to centrifugal equipment, a flocculant is added to adjust the particle size of the solid substance, the blue-green algae residue is discharged through an unloading mouth after the centrifugal dewatering, and clear water is recycled through a pipeline. The centrifugal equipment adopts the horizontal spiral discharge sedimentary centrifuge. The horizontal spiral discharge sedimentary centrifuge utilizes the density difference of the quasi solid phase and the liquid phase of the suspension liquid to enable the solid phase substance to fast sedimentate on the wall of a rotary drum in the centrifugal force field produced by the high speed rotation of the rotary drum, so as to separate the solid and the liquid phases, the centrifuge continues to feed while continuously separating, and the separating medium and the residues are respectively discharged. The invention provides a practical and coordinate comprehensive method for the algal bloom treatment engineering in a lake, solves the problem that the transportation and the processing of the algae slurry are difficult, and improves the feasibility of the algae comprehensive utilization.

Description

technical field [0001] The invention relates to a method for using a horizontal spiral unloading sedimentation centrifuge to remove water from blue algal pulp, so that the liquid phase algae pulp becomes semi-solid phase algae cake, and its volume is greatly reduced. It belongs to the field of environmental protection technology. technical background: [0002] A large number of blooms of blue-green algae in lakes seriously endanger drinking water sources on the one hand, and also greatly damage the landscape on the other hand. Studies have shown that the bloom of cyanobacteria is an abnormal response of the ecosystem after the eutrophication of the lake. The reason for its occurrence is related to the physical environment of the lake such as light (or transparency), temperature and suitable hydrodynamic conditions, as well as to the chemical environment of the lake. , such as nitrogen, phosphorus concentration and its nitrogen, phosphorus ratio, etc., as well as some physio...

AI Technical Summary

Problems solved by technology

A large amount of algae pulp will be produced by mechanical salvage. These algal pulps contain a large amount of water and rich in nitrogen, phosphorus and other nutrient-rich substances. They are easily corrupted, emit foul odors, and have the risk of secondary pollution; moreover, the storage occupies a large area and is inconvenient to transport.

The dehydration performance of algae pulp is poor, the algae cake is not easy to form, and the dehydration methods such as vacuum suction filtration and pressure filtration are not effective. Therefore, the problem of difficult treatment of algae pulp has become an important factor restricting the control of cyanobacteria blooms in lakes for a long time.

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