Integrated granular sludge vulcanization and decalcification apparatus and method

Abstract

The invention discloses an integrated granular sludge vulcanization and decalcification apparatus and method. A main body of the apparatus comprises a sludge collection area, a water distribution area, a decalcification area, a vulcanization area and a circulation area. The sludge collection area is provided with a sludge collection chamber and a sludge guide pipe; the water distribution area is provided with a water inlet pipe and a water distribution chamber; the decalcification area is provided with a granular sludge chamber and a sedimentation separation chamber; the vulcanization area isprovided with an air supply chamber, a sulfur granule bed and an annular acid storage chamber; and the circulation area is provided with an acid liquor circulation system and a mixed liquor circulation system. Through the function of the circulation area, the continuous production of sulfuric acid is implemented; through the function of the decalcification area, the continuous dissolution of calcium carbonate is implemented; through the function of the circulation area, the recycling of sulfuric acid liquor is implemented; and through the function of the sludge collection area, the output of decalcified granular sludge is implemented. The apparatus integrates acid production by vulcanization and granular sludge decalcification together, so the structure of the apparatus is compact; becausethe acid is produced by thiobacillus, the cost is low, and the thiobacillus can oxidize elemental sulfur into the sulfuric acid as long as the sulfur granule bed is aerated; because acid liquor is adopted for dissolution for decalcification, the amount of acid can be controlled, and damage to granular sludge can be alleviated.

Description

technical field [0001] The invention relates to a granular sludge decalcification device, in particular to an integrated granular sludge sulfide decalcification device and method. Background technique [0002] Human life and production activities discharge a large amount of organic wastewater, resulting in serious pollution of lakes, rivers and coastal waters in my country. As a class of cost-effective wastewater treatment technologies, UASB, EGSB, and IC reactors are widely used in organic wastewater treatment. Organic wastewater, especially industrial organic wastewater generally contains calcium. During anaerobic biological treatment, organic pollutants are converted into carbon dioxide, combined with calcium to produce calcium carbonate, which is distributed inside and on the surface of granular sludge, which can affect activity by affecting mass transfer. Calcified granular sludge accumulates in the reactor, which not only reduces the effective volume of the device, i...

AI Technical Summary

Problems solved by technology

So far, the main means to deal with the calcification of granular sludge in engineering is to carry out chemical decalcification pretreatment of wastewater or increase the replacement frequency of calcified granular sludge in the reactor. The former needs to add a large amount of chemicals, and the latter needs to add a large amount of High efficiency sludge, high cost

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