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Method for promoting startup of anaerobic reactor

An anaerobic reactor and composite anaerobic technology are used in the field of using conductive particles to promote the start-up of anaerobic reactors. Transfer efficiency, sludge loss prevention, wide application effect

Active Publication Date: 2018-07-24
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the problems that the anaerobic reactor in the prior art has a long start-up period, and the operating state is easily affected by fluctuations in water quality, water quantity, and water temperature during the start-up process, the present invention aims to provide an environmentally friendly conductive Material compounded with anaerobic activated sludge to increase organic load tolerance of anaerobic reactor and facilitate start-up method of anaerobic reactor

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  • Method for promoting startup of anaerobic reactor
  • Method for promoting startup of anaerobic reactor
  • Method for promoting startup of anaerobic reactor

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Embodiment 1

[0054] The present embodiment 1 is to inoculate the anaerobic activated sludge reactor experimental group containing conductive nano-ferric oxide particles, and the specific operations are as follows:

[0055] Step (1), get the compound anaerobic activated sludge test that contains conductive nano ferric oxide: will be taken from the sludge sieve of the sludge thickening tank of the municipal sewage treatment plant, remove larger particles, get the sieved sludge 3.3 L adds 2.7L nanometer iron ferric oxide dispersion liquid, described anaerobic sludge concentration 20gVSS / L, in nanometer iron ferric oxide dispersion liquid preparation step, iron ferric oxide nanoparticle is added in deionized water, ultrasonic dispersion 30min , power 200W, the temperature of the deionized water does not exceed 40 ° C, the preparation of nano ferric oxide dispersion. Described nanometer ferric oxide dispersion liquid concentration 2.4g / L, in described nanometer ferric oxide dispersion liquid, f...

Embodiment 2

[0061] The present embodiment 2 is to inoculate the anaerobic activated sludge reactor experimental group containing conductive nano-ferric oxide particles, and the specific operations are as follows:

[0062] Step (1), get the compound anaerobic activated sludge test that contains conductive nano-ferric oxide: will be taken from the sludge sieve of the sludge concentration tank of the municipal sewage treatment plant, remove larger particles, get the sieved sludge 4.5 L adds 1.5L nanometer ferric oxide dispersion liquid, described anaerobic sludge concentration 20gVSS / L, described nanometer ferric oxide dispersion liquid concentration 3g / L, in described nanometer ferric oxide dispersion liquid Iron (Fe 3 o 4 NPs) particle size is 30nm; Fe 3 o 4 NPs: dry weight of anaerobic activated sludge (VSS) = 0.05:1 (mass ratio), slowly stirred at room temperature 25°C for 24h, and agitated at a speed of 100rpm for anaerobic culture to prepare inoculum sludge.

[0063] Step (2), inoc...

Embodiment 3

[0068] The present embodiment 3 is to inoculate the anaerobic activated sludge reactor experimental group containing conductive nano-ferric oxide particles, and the specific operations are as follows:

[0069] Step (1), get the compound anaerobic activated sludge test that contains conductive nano-ferric oxide: will be taken from the sludge sieve of the sludge concentration tank of the municipal sewage treatment plant, remove larger particles, get the sieved sludge 4.5 L adds 1.5L nanometer ferric oxide dispersion liquid, described anaerobic sludge concentration 20gVSS / L, described nanometer ferric oxide dispersion liquid concentration 1.3g / L, four in the nanometer ferric oxide dispersion liquid Ferric oxide (Fe 3 o 4 NPs) particle size is 30nm; Fe 3 o 4 NPs: dry weight of anaerobic activated sludge (VSS) = 0.2:1 (mass ratio), slowly stirred at room temperature 25°C for 24 hours, and performed anaerobic culture at a stirring speed of 100rpm to prepare inoculum sludge.

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Abstract

The invention provides a method for promoting the startup of an anaerobic reactor, and belongs to the field of anaerobic biological treatment of wastewater. The method comprises the following steps: (1) performing mixed culturing on a conductive particle dispersion and anaerobic activated sludge to prepare compound anaerobic activated sludge; and (2) inoculating the anaerobic reactor with the compound anaerobic activated sludge obtained in step (1) at a concentration of 5-15 gVSS / L, and intensifying the startup of the reactor, wherein the conductive nanoparticles are an electrical non-biotoxicmaterial. The conductive nanomaterial is compounded with bacteria in an anaerobic sewage treatment system in the method to enhance the metabolism of anaerobic bacteria, and the introduction of the conductive particles effectively improves the anaerobic reactor's ability to cope with high organic load, enhances the stability in the startup process of the reactor, and promotes the startup of the reactor.

Description

technical field [0001] The invention belongs to the field of anaerobic biological treatment of wastewater, and in particular relates to a method for promoting the start-up of an anaerobic reactor by using conductive particles. Background technique [0002] Anaerobic biological treatment technology is a technology in which facultative anaerobic and anaerobic microorganisms convert organic matter into methane and carbon dioxide under anaerobic conditions, also known as anaerobic digestion. Due to the low energy consumption of this technology, the low output of residual sludge, and the recovery of biomass energy (methane), it has been widely concerned and applied in wastewater treatment. However, due to the long generation cycle of anaerobic bacteria in anaerobic activated sludge and their sensitivity to environmental changes, the start-up period of anaerobic reactors is long, usually 3 to 8 months. Moreover, during the start-up process of the anaerobic reactor, the operating ...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 花铭孙得胜潘丙才郭琼鹿时雨张炜铭吕路
Owner NANJING UNIV
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