Blue-green algae and excess sludge resourceful treatment method

Abstract

The invention discloses a blue-green algae and excess sludge resourceful treatment method.Blue-green algae with water content of 95-98% and excess sludge are mixed according to the mass ratio of 1:100 to 1:5, dry solid flocculant is added according to the mass percentage of 1%o to 8%o, the materials are sent into a plate frame pressure filter, and sludge cakes with water content of 70-80% is obtained after dewatering.Then, the mud cakes are sent to a storage yard, sludge drying is further achieved through solar drying and air blowing measures, mud cakes are sent into a sludge granulating device to prepare granules with granularity of 2-4 mm and water content of 5-15%.The method has the advantages that blue-green algae and excess sludge can be effectively used as raw materials, nitrogen phosphorus and potassium organic fertilizer contained in blue-green algae and excess sludge is sufficiently used for preparing garden greening and biological agriculture organic slow-release fertilizer, and harmless treatment and resource utilization of blue-green algae and excess sludge are achieved.

Description

technical field [0001] The invention relates to the field of solid waste disposal, in particular to a method for recycling blue-green algae and excess sludge. Background technique [0002] Excessive content of nitrogen, phosphorus and other substances in the natural water environment will cause the overgrowth of aquatic organisms, especially algae, destroy the ecological balance of the water body, and form serious lake eutrophication. With economic development and social needs, water environment governance, especially lake eutrophication, has become the primary problem to be solved at present. [0003] The main methods of controlling cyanobacteria in my country include biological treatment, mechanical salvage, and engineering dredging. Among them, the mechanical salvage method and engineering dredging method are the most common. These two methods can separate cyanobacteria from the water body in a short time, but how to dispose of the separated algae mud is still a difficu...

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