Process and device for treating Fenton iron mud by anaerobic microorganisms

An anaerobic microorganism and anaerobic sludge bed technology, which is applied in anaerobic digestion treatment, biological sludge treatment, biological water/sewage treatment, etc., to achieve the effect of enhancing efficiency and increasing production

Inactive Publication Date: 2017-09-19
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on using Fenton iron sludge as a source of ferric iron to promote anaerobic digestion

Method used

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  • Process and device for treating Fenton iron mud by anaerobic microorganisms
  • Process and device for treating Fenton iron mud by anaerobic microorganisms
  • Process and device for treating Fenton iron mud by anaerobic microorganisms

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Embodiment Construction

[0021] (1) The application mechanism involved in the present invention is the reduction mechanism of dissimilated iron, and the reduction mechanism of dissimilated iron is as follows: image 3 As shown, the life metabolism process of microorganisms needs respiration. The life metabolism of dissimilatory iron-reducing bacteria uses organic matter as the electron donor, ferric iron as the electron acceptor, and transfers electrons to the trivalent iron while oxidizing the organic matter into carbon dioxide and water. Iron, which reduces ferric iron to divalent iron, and in this process obtains energy for life growth. Compared with other anaerobic microorganisms, dissimilatory iron-reducing bacteria have a stronger ability to decompose and transform organic matter, especially macromolecules and refractory substances. The small molecules produced by the degradation of macromolecules can be used by methanogens to generate methane for energy recovery. Adding Fenton iron slime as a s...

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Abstract

A device for treating Fenton iron mud by anaerobic microorganisms comprises a barrel of an up-flow anaerobic sludge blanket reactor. Mud shields and a three-phase separation are arranged in the barrel, and a water inlet pipe is connected with the bottom of the barrel. The device is characterized in that the barrel is provided with a hollow thermal insulation cavity connected with a circulating water bath. A process for treating Fenton iron mud by the device includes: adding to-be-treated Fenton iron mud into a water feeding regulation tank, running the barrel of the up-flow anaerobic sludge blanket reactor, and controlling hydraulic retention time, temperature and pH; leading iron mud mixed wastewater into the barrel, and enriching dissimilatory iron-reducing bacteria by ferric iron in iron mud through ferric iron reducing action to remove organics in iron mud and wastewater and generate energy gas. The process and the device have advantages that effective removal of the organics in the iron mud is realized, wastewater chemical oxygen demand removal rate is increased, and methane yield is increased. The process and the device are especially suitable for treatment of organic wastewater with long-chain fatty acids and rich in aromatic hydrocarbon compounds of benzene, phenol and the like.

Description

technical field [0001] The invention relates to the field of solid waste recycling technology. Background technique [0002] The Fenton and Fenton-like oxidation process is a catalytic oxidation technology that has been gradually promoted in recent years. 2+ and Fe 3+ Hydrogen peroxide is catalyzed to generate strong oxidizing hydroxyl radicals (·OH) to oxidize refractory components in wastewater. The reaction can be carried out under normal temperature and pressure. The process is simple and has great potential for industrialization. It has been successfully applied to the treatment of printing and dyeing wastewater, oily wastewater, phenolic wastewater, coking wastewater, nitrobenzene-containing wastewater, and diphenylamine wastewater. middle. However, not only the oxidation reaction of hydroxyl radicals occurs during the Fenton reaction process, but also the flocs of ferric hydroxide also have a certain flocculation effect on organic matter and other pollutants, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F3/28C02F101/30C02F103/06
CPCC02F3/2846C02F11/04C02F2101/30C02F2103/06C02F2305/06
Inventor 张耀斌王名威赵智强
Owner DALIAN UNIV OF TECH
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