Sewage treatment system and method for realizing substance and energy recovery based on sulfur circulation

Abstract

The invention discloses a sewage treatment system and a method for realizing substance energy recovery based on sulfur circulation. The system comprises an anaerobic membrane bioreactor, a nitrogen and phosphorus recovery tank, a biological aerated filter, a denitrification filter, a sedimentation tank, a hydrolysis acidification tank, a dosing tank, a dosing metering pump, a first gas distribution pipeline, a second gas distribution pipeline, a biogas storage tank, an aeration disc, a first biogas fan, a second biogas fan, an aeration fan, a chemical desulfurization and drying device and a recycled biogas storage tank. An anaerobic membrane bioreactor is combined with a biological membrane technology, residual sludge can be intercepted and reduced, sulfur recycling is formed in the system, hydrogen sulfide in biogas is used for providing an electron donor for subsequent denitrification, sulfate generation can be reduced, and blockage in operation of a denitrification filter tank can be relieved; the anaerobic membrane bioreactor can effectively recover energy from sewage, so that the cost is reduced while the energy self-sufficiency rate is improved; sediments in a crystallizationmode are easier to separate and recycle, and the material recycling efficiency is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sewage treatment system and method for realizing material and energy recovery based on sulfur cycle. Background technique [0002] Domestic sewage contains a large amount of organic matter, nitrogen, phosphorus and other nutrients, and its water volume is relatively stable, easy to collect and treat, and realize the recycling of materials and energy in it, which can not only bring economic benefits, reduce sewage treatment costs, and contribute to sustainable Development is also important. [0003] Anaerobic biological treatment technology can use the organic matter in sewage to generate biogas under the action of microorganisms, and realize energy recovery and utilization. However, the concentration of organic matter contained in domestic sewage is limited, and the treatment effect of traditional anaerobic biological treatment technology is not good, and the biogas production ...

AI Technical Summary

Problems solved by technology

[0005] Based on the problems existing in the prior art, the purpose of the present invention is to provide a sewage treatment system and method based on the sulfur cycle to realize material and energy recovery, which can solve the problem of poor nitrogen and phosphorus treatment effect in existing processes capable of material and energy recovery. Good, phosphorus recovery is incomplete, difficult operation and maintenance lead to increased operating costs, and large sludge production leads to increased treatment costs, etc.

Images