Double-internal-circulation active sludge resource utilization type treatment method

Abstract

The invention discloses a double-internal-circulation activated sludge resource utilization type treatment method which comprises the following steps: conveying dehydrated activated sludge into a rotary anaerobic dry distiller, and carrying out anaerobic dry distillation pyrolysis treatment on the dehydrated activated sludge and crushed waste biomass auxiliary materials at intervals and in sections; the method comprises the following steps: mixing an activated sludge carbonization product and a waste gas biomass carbonization product according to a certain ratio to prepare a carbon-based raw material, crushing the carbon-based raw material, adding an auxiliary agent, uniformly mixing, adding an auxiliary agent for bonding into a particle forming machine, drying, and packaging to obtain a finished carbon-based fertilizer recycling product. According to the method, waste can be recycled and converted into a biochar-based fertilizer product meeting the requirements of NY / T3041-2016'biochar-based fertilizer ', internal circulation treatment in the pollutant design in the production process is linked with one another, no extra waste or waste gas is produced, resource reutilization of pollutants and pollutant circulation retreatment of a matched process are achieved through the whole set of process design, and the method is suitable for industrial production. And finally, the purpose of zero emission of pollutants is achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a double-internal-circulation activated sludge resource utilization type disposal method. Background technique [0002] Activated sludge is a general term for microbial groups such as bacteria, fungi, algae and protozoa and their attached organic and inorganic substances. It plays a key role in the process of domestic sewage treatment and purification. The daily output of activated sludge in the treatment and recycling facilities is about 220,000 to 240,000 tons per day. The analysis predicts that the output of activated sludge will increase at a rate of 10 to 15% per year in the future, but the harmless treatment part is only about 40%. And the harmless treatment technology needs to be upgraded and improved urgently. If such a huge output of activated sludge is not treated effectively, it will inevitably cause huge potential risks to the environment. [0003] A...

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Problems solved by technology

[0002] Activated sludge is a general term for microbial groups such as bacteria, fungi, algae and protozoa and their attached organic and inorganic substances. It plays a key role in the process of domestic sewage treatment and purification. At present, according to relevant published statistics, the national urban sewage The daily output of activated sludge in treatment and recycling facilities is about 220,000 to 240,000 tons per day. The analysis predicts that the output of activated sludge in the future will increase at a rate of 10 to 15% per year, but the harmless treatment part is only about 40%. Moreover, the harmless treatment technology needs to be upgraded urgently. If the activated sludge with such a huge output cannot be disposed of effectively, it will inevitably cause huge potential risks to the environment.

[0003] At present, the main technologies for activated sludge disposal are: concentrated dehydration landfill technology, dry incineration technology, aerobic composting technology and high temperature hydrolysis-anaerobic digestion technology, but these technologies have certain potential risks and some cause pollution to the environment , and the output after processing cannot achieve the expected effect

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