Cyanobacteria dehydrated algal mud waste treatment process

Abstract

The invention relates to a cyanobacteria dehydrated algal mud waste treatment process. The process comprises the following steps: 1) ultrahigh-pressure deep filter pressing is carried out; 2) sterilizing and drying are carried out; 3) a blue algae granular fertilizer is produced, no conditioner is added, and the blue algae granular fertilizer can be produced after dehydration, sterilization and disinfection, so that harmless treatment and resource utilization of the blue algae mud are realized, and the blue algae granular fertilizer prepared from the blue algae mud is low in water content, remarkable in volume reduction effect, low in process energy consumption and high in sterilization and drying efficiency.

Description

technical field [0001] The invention relates to a cyanobacteria treatment process, in particular to a cyanobacteria dehydrated algae mud waste treatment process. Background technique [0002] For the treatment of cyanobacteria blooms in rivers, lakes, reservoirs and other water bodies, horizontal screw centrifuges, belt filter presses, screw stackers and other machines are generally used to separate algae water and the tail water after the algae water separation is passed through the air Floating treatment, standard discharge, but the algae sludge produced after the separation of algae water must be treated in a harmless manner. [0003] The algae mud produced after the separation of algae water is a paste-like organic mud made of blue-green algae as the main species. It is characterized by high water content (85%-90%) and high organic matter content in dry matter (95%-100%) , and contains algae toxins, which are particularly prone to corruption and odor. [0004] At prese...

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Problems solved by technology

[0004] At present, about 1.5 million tons of algae mud (with a moisture content of 85% to 90%) produced through the separation of algae and water in the process of cyanobacteria treatment in my country will cause great harm to the ecological environment if not properly disposed of.

At present, the large-scale disposal technologies for algae mud mainly include cyanobacteria algae mud fermentation and composting, cyanobacteria algae mud and municipal sludge collaborative deep dehydration, drying incineration, direct landfill and other methods. Medium odor is relatively large, and the synergistic deep dehydration of cyanobacteria and municipal sludge needs to add municipal sludge in a certain proportion, and directly landfill the newly formed stock of algae sludge, which will produce malodorous gas for a long time and have a great impact on the ecological environment, so it is necessary to look for cyanobacteria Harmless disposal of algae mud, new technology and new method of resource utilization

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