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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  • Abstract
  • Description
  • Claims
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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 proc

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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

Examples

Experimental program
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Example Embodiment

[0053] Example 1:

[0054] This Example 1 is an experimental group of anaerobic activated sludge reactors inoculated with conductive nano-ferric oxide particles. The specific operations are as follows:

[0055] Step (1), test on the composite anaerobic activated sludge containing conductive nano ferroferric oxide: sieve the sludge from the sludge thickening tank of the municipal sewage treatment plant to remove larger particles, and take the sieved sludge 3.3 L add 2.7L nano ferroferric oxide dispersion liquid, the anaerobic sludge concentration is 20gVSS / L, in the preparation step of nano ferric oxide dispersion liquid, add ferroferric oxide nanoparticles into deionized water, and ultrasonically disperse for 30 min , The power is 200W, and the temperature of the deionized water does not exceed 40°C to prepare the nano-ferric oxide dispersion. The concentration of the nano-ferric oxide dispersion is 2.4g / L, and the nano-ferric oxide dispersion (Fe 3 O 4 NPs) The particle size is 2...

Example Embodiment

[0060] Example 2:

[0061] This Example 2 is an experimental group of anaerobic activated sludge reactor inoculated with conductive nano-ferric oxide particles. The specific operations are as follows:

[0062] Step (1), test on the composite anaerobic activated sludge containing conductive nano ferroferric oxide: sieve the sludge from the sludge thickening tank of the municipal sewage treatment plant to remove larger particles, and take the sieved sludge 4.5 L added 1.5L of nano-ferric oxide dispersion, the anaerobic sludge concentration was 20gVSS / L, the nano-ferric oxide dispersion had a concentration of 3g / L, and the nano-ferric oxide dispersion contained tetraoxide Iron (Fe 3 O 4 NPs) The 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, stirring speed 100rpm for anaerobic culture to prepare inoculated sludge.

[0063] Step (2), inoculate the prepared conductive particle com...

Example Embodiment

[0067] Example 3:

[0068] This Example 3 is an experimental group of anaerobic activated sludge reactor inoculated with conductive nano-ferric oxide particles. The specific operations are as follows:

[0069] Step (1), test on the composite anaerobic activated sludge containing conductive nano ferroferric oxide: sieve the sludge from the sludge thickening tank of the municipal sewage treatment plant to remove larger particles, and take the sieved sludge 4.5 L is added 1.5L of nano-ferric oxide dispersion, the anaerobic sludge concentration is 20gVSS / L, the nano-ferric oxide dispersion has a concentration of 1.3g / L, and the nano-ferric oxide dispersion contains four Ferric oxide (Fe 3 O 4 NPs) The 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 24h, stirring speed 100rpm for anaerobic culture to prepare inoculated sludge.

[0070] Step (2), inoculate the prepared conductive particle...

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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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