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Application of lignin and derived carbon thereof in anaerobic digestion

A technology of anaerobic digestion and derivation of carbon, which is applied in anaerobic digestion treatment, carbon preparation/purification, chemical instruments and methods, etc., which can solve the problems of microbial toxicity inhibition, high value-added lignosulfonate utilization efficiency, Poor biodegradability and other problems, to achieve the effect of increasing methane production and realizing high-value utilization

Active Publication Date: 2019-04-19
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the high value-added utilization of lignosulfonate is not efficient
In addition, the biodegradability of wastewater containing lignosulfonate is poor and it is easy to produce toxic inhibition to microorganisms and other factors.
Therefore, the biochemical treatment of this type of wastewater has always been a difficult problem in the industry.

Method used

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  • Application of lignin and derived carbon thereof in anaerobic digestion
  • Application of lignin and derived carbon thereof in anaerobic digestion
  • Application of lignin and derived carbon thereof in anaerobic digestion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Preparation of lignosulfonate-based derivatized charcoal: Derived charcoal was prepared by temperature programming method. Sodium lignosulfonate (calcium) was dried at 85° C. for 24 hours, and then pulverized into a powder with a particle size of 100 mesh by a high-speed pulverizer. Weigh 40g of dried sodium lignosulfonate (calcium) powder, place it in a ceramic crucible, cover the surface with pebbles of different sizes, compact and seal it, put it into a temperature-programmed furnace, pass nitrogen gas into it for 20 minutes, and discharge it from the furnace Air, then heat up to 100°C at a rate of 10°C / min for preheating, heat evenly and then heat up to 400°C, constant temperature pyrolysis for 2 hours, cool to room temperature and crush into powder with a particle size of 100 mesh, put it in a brown glass bottle for later use .

[0056] (2) Cultivation of inoculated sludge: The remaining sludge was taken from the sludge dewatering room of Jinan West Wastewater...

Embodiment 2

[0064] (1) Preparation of lignosulfonate-based derivatized charcoal: Derived charcoal was prepared by temperature programming method. Sodium lignosulfonate (calcium) was dried at 90° C. for 36 h, and then pulverized into a powder with a particle size of 100 mesh by a high-speed pulverizer. Weigh 40g of dried sodium lignosulfonate (calcium) powder, place it in a ceramic crucible, cover the surface with pebbles of different sizes, compact and seal it, put it into a temperature-programmed furnace, pass nitrogen gas into it for 20 minutes, and discharge it from the furnace Air, then heat up to 100°C at a rate of 10°C / min for preheating, heat evenly and then heat up to 400°C, thermolyze for 2 hours at a constant temperature, cool down to room temperature, crush into powder with a particle size of 100 mesh, and pack it in a brown glass bottle for later use .

[0065] (2) Cultivation of inoculated sludge: The remaining sludge was obtained from Jinan West Wastewater Treatment Plant, ...

Embodiment 3

[0068] (1) Preparation of lignosulfonate-based derivatized charcoal: Derived charcoal was prepared by temperature programming method. Sodium lignosulfonate (calcium) was dried at 100° C. for 18 hours, and then pulverized into a powder with a particle size of 100 mesh by a high-speed pulverizer. Weigh 40g of dried sodium lignosulfonate (calcium) powder, place it in a ceramic crucible, cover the surface with pebbles of different sizes, compact and seal it, put it into a temperature-programmed furnace, pass nitrogen gas into it for 20 minutes, and discharge it from the furnace Air, then heat up to 100°C at a rate of 5°C / min for preheating, heat evenly and then heat up to 200°C, thermolyze for 1 hour at a constant temperature, cool to room temperature and crush into powder with a particle size of 100 mesh, put it in a brown glass bottle for later use .

[0069] (2) Cultivation of inoculated sludge: The remaining sludge was obtained from Jinan West Wastewater Treatment Plant, and ...

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Abstract

The invention relates to an application of lignin and derived carbon thereof in anaerobic digestion. The invention discloses a method capable of increasing the application value of lignosulfonate andchanging / influencing the methane output of anaerobic digestion. Sodium (calcium) lignosulfonate is taken as the raw material to prepare derived carbon, then sodium (calcium) lignosulfonate and derivedcarbon are applied to anaerobic digestion, the inhibition mechanism of lignosulfonate on anaerobic digestion can be researched, and theoretical basis is provided for the biochemical treatment on wastewater rich in lignosulfonate. At the same time, derived carbon of lignosulfonate is added during the anaerobic digestion process, anaerobic microbes are enriched, the activity of anaerobic microbes is improved, and the methane output is increased.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to the preparation and application of a lignosulfonate and its sulfonate-based derived carbon, and adding the lignosulfonate and its derived carbon into an anaerobic digestion system for analysis Effects of lignosulfonate and its derived char additions on gas production in anaerobic digestion. Background technique [0002] Lignin is a natural macromolecular organic substance that is naturally renewable and rich in sources on the earth. It is estimated that about 6×10 14 Lignin is a resource with great potential. Lignin is a by-product of the paper industry. During the pulping process, most of the lignin is dissolved in the waste liquid, which is the main component of the pulping waste liquid. Due to different raw materials and pulping methods, lignin exists in different forms in pulping waste liquor. Alkali lignin exists in the waste liquid of alkalin...

Claims

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Application Information

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IPC IPC(8): C02F3/28C01B32/05
CPCC01B32/05C02F3/28C02F2305/06Y02E50/30
Inventor 张记市臧立华赵蕾
Owner QILU UNIV OF TECH
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