Method for conditioning sludge by two-phase folded plate flow bio-leaching reactor

Abstract

The invention discloses a method for conditioning sludge by a two-phase folded plate flow bio-leaching reactor, and belongs to the technical field of sludge treatment. In order to reduce the inhibition effect of soluble organic matters on acidophilic thiobacillus and improve the sludge dewatering performance. The method comprises the following specific steps: (1) adopting a reactor, which comprises a reaction chamber, a sludge reflux device, an energy substrate adding device and the like, wherein the reaction chamber is divided into two parts, the first part is a first compartment, and the second part is other compartments; (2) adding raw sludge and an energy substrate, aerating, keeping part of sludge after the reactor is successfully started, discharging the rest sludge, supplementing raw sludge and the energy substrate, and repeating the culture process to obtain an inoculation solution; (3) adding the inoculation solution and raw sludge into the reaction chamber and aerating; (4) returning the sludge in a sludge storage tank to the first part; (5) adding the energy substrate into the second part; and (6) continuously operating after the reactor is successfully started accordingto the steps. The method is mainly used for conditioning the sludge by a bio-leaching method.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, in particular to a method for conditioning sludge in a two-phase folded-plate flow biological leaching reactor. Background technique [0002] Sewage plants use the activated sludge method to treat sewage, producing a large amount of sludge. Sludge contains toxic and harmful substances such as viruses, bacteria, and heavy metals, which have potential environmental and ecological health risks. However, sludge also contains plant nutrients such as nitrogen and phosphorus, which has certain utilization value. Therefore, sludge needs to be reduced, harmless and resourced to reduce its toxic effect and be used as a resource. Sludge composting, landscaping and landfill are effective methods for sludge utilization and treatment, which can realize sludge reduction, harmlessness and resource utilization. However, the moisture content of sludge still reaches 80% after being concentrated and mecha...

AI Technical Summary

Problems solved by technology

Its advantage is to increase the processing capacity of the bioleaching reactor, and the pool capacity of the bioleaching reactor can be reduced by 50% under the same treatment capacity. The disadvantage is that the bioleaching cycle is long, the operating cost is high, and it is impossible to form suitable acid-resistant heterotrophic bacteria The pH environment for the growth of A.f bacteria, and there is still a high concentration of DOM in the sludge affects the growth and reproduction of bioleaching microorganisms and the efficiency of bioleaching, so it is necessary to improve the bioleaching technology

[0005] The study found that the current bioleaching reactor cannot form a pH environment suitable for the growth of acid-resistant heterotrophic bacteria, A.t bacteria, and A.f bacteria, so there is still a high concentration of DOM in the sludge that can inhibit the growth and reproduction of A.t bacteria and A.f bacteria, reducing Bioleaching Efficiency

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