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A kind of ph adjustment method of anaerobic fermentation liquid

A technology of anaerobic fermentation broth and adjustment method, which is applied in the field of pH adjustment of anaerobic fermentation broth, can solve the problems of imperfect reuse technology, inability to meet diversification, etc., so as to reduce the cost of separate treatment, eliminate safety hazards, and reduce procurement. The effect of the process

Active Publication Date: 2018-06-26
ANHUI GEYI CYCLIC ECONOMY IND PARK
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  • Claims
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Problems solved by technology

However, these reuse technologies are not perfect in themselves, and cannot meet the current diverse needs

Method used

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  • A kind of ph adjustment method of anaerobic fermentation liquid
  • A kind of ph adjustment method of anaerobic fermentation liquid
  • A kind of ph adjustment method of anaerobic fermentation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] 1. Clear liquid storage tank: the storage tank is a cuboid stainless steel box type with a volume of 12m 3 .

[0038] 2. When the clear liquid comes to the water treatment, it first enters the storage tank, and then by adjusting the outlet valve of the storage tank, the flow rate is controlled so that the pH of the circulating pool can be kept within the range of 6.8 to 7.5.

[0039] 3. Various indicators of the clear liquid: temperature ≤ 45°C, pH value 12-12.5, COD (chemical oxygen demand) content ≤ 15000mg / L, SS (suspended solids) content ≤ 300mg / L.

[0040] 4. Various indicators of the hemicellulose liquid entering the circulating pool: temperature 30°C-37°C, pH value 5.0-7.5, COD (chemical oxygen demand) content ≤ 8000mg / L, SS (suspended solids) content ≤ 500mg / L .

[0041] 5. Various indicators of the hemicellulose liquid in the circulating pool: temperature 30°C-37°C, pH value 6.8-7.5, COD (chemical oxygen demand) content ≤ 8000mg / L, SS (suspended solids) conte...

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Abstract

The invention provides a method for adjusting the pH of anaerobic fermentation liquid. The method includes the step that industrial waste water is used as pH adjusting liquid to adjust the pH value of the anaerobic fermentation liquid, wherein the temperature of the industrial waste water is larger than 0 DEG C and smaller than 45 DEG C, the pH value is larger than 12 and smaller than 12.5, the chemical oxygen demand content is 15000 mg / L or below, and the suspended matter content is 300 mg / L or below. By means of the method, independent treatment cost of supernate can be reduced. Besides, potential pollution damage of the liquid to the environment is effectively eliminated, the complicated purchasing process is shortened, and safety hazards existing during loading and unloading of caustic soda liquid are eliminated.

Description

technical field [0001] The invention relates to the field of high-efficiency comprehensive utilization of biomass resources, in particular to a method for adjusting the pH of anaerobic fermentation liquid used in the process of producing cellulose, hemicellulose and lignin from biomass raw materials through a three-stage separation technology. Background technique [0002] A large amount of fiber components are contained in agricultural biomass resources such as various plant straws. One of the important research directions for the comprehensive utilization of biomass resources is to obtain cellulose, hemicellulose and lignin from biomass resources through separation technology, and the three are collectively referred to as "three elements". A large amount of water is required in the three-stage separation process, and a considerable amount of various liquids are also produced, including the hemicellulose liquid phase produced during the first-stage separation and the bioche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F103/26
CPCC02F1/001C02F1/04C02F1/44C02F1/66C02F9/00C02F2001/007C02F2103/26C02F2201/007C02F2301/08
Inventor 邹海平周婉莹黄裔邹妍李刚刘湘逸朱友
Owner ANHUI GEYI CYCLIC ECONOMY IND PARK
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