High-temperature aerobic fermentation process for sludge with low energy consumption and no pollution

Abstract

The invention discloses a high-temperature aerobic fermentation process for sludge with low energy consumption and no pollution, and relates to the technology for aerobic fermentation treatment on dewatered sludge. The process is used for decontamination, stabilization and reduction treatment of town sewage sludge, sewage sludge, organic industrial wastewater sludge and organic sludge. In the process, the dewatered sludge and auxiliary materials are mixed, the mixture is crushed into composting particles with the diameter less than or equal to 20mm, the composting particles are evenly distributed into a pile with the height of 2m by a spreader, and the pile is covered by fermented decaying products to effectively reduce the odor emitted by the composting. A fermentation bin with two combined or separated bins is provided with a ventilation and oxygen supply system which is detachable, is easy to clear, prevents blockage and has even gas distribution, and a pile turning device inside; and the oxygen concentration, fermentation temperature, water ratio of the pile in the fermentation bin are controlled, so that sludge fermented products meet national standard. The process facilitates air supply and aerobic fermentation of the pile due to small diameter of the composting particles and the loose pile, has thorough fermentation of the particles of the sludge mixture, improves the quality of the sludge fermented products, makes the sludge fermented products meet the decontamination, stabilization and reduction index requirements specified by the national standard, and greatly saves electric energy consumption and reduces operating cost.

Description

technical field [0001] A low-energy, pollution-free sludge high-temperature aerobic fermentation process, involving dewatered sludge aerobic fermentation treatment technology, used for the treatment of urban sewage sludge, and can also be used for organic sewage sludge, organic industrial wastewater sludge, etc. Sludge treatment. Background technique [0002] With the rapid development of urbanization, the requirements for urban environmental governance have increased and the urban sewage treatment system has been improved. The amount of sewage sludge to be treated is huge. Strong odor, the sludge also contains organic substances, nitrogen and phosphorus, heavy metals and salts, as well as pathogenic microorganisms and parasite eggs. If the sewage sludge is not effectively treated and disposed of, it will damage the environment, pollute water and soil, and endanger Human health, the treatment, disposal and utilization of sewage sludge have become the focus of urban construc...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing aerobic sludge fermentation process, there are especially deficiencies in high energy consumption, extensive use of plant residues (such as wood chips, wheat grass chips, reed chips, etc.), environmental pollution, and incomplete stabilization and harmlessness. After long-term research, the inventor proposed a low-energy, non-polluting sewage sludge with low energy consumption, less plant residues, no environmental pollution, stable fermentation products, and harmless indicators that meet or exceed national standards. High temperature aerobic fermentation process

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