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Integrated technology for treating wheat straw wastewater

A waste water and technology technology, applied in the direction of sedimentation treatment, water/sewage treatment, biological water/sewage treatment, etc., can solve the problems of environmental secondary pollution, environmental hazards such as organic chlorides, etc.

Inactive Publication Date: 2020-01-07
XINJIANG ENVIRONMENTAL ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an integrated technology for treating wheat straw wastewater, which solves the problem that the traditional wheat straw chemical pulping process will produce organic chlorides that are harmful to the environment, and once the wastewater and floating objects are discharged To the outside world, it will cause secondary pollution to the environment

Method used

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  • Integrated technology for treating wheat straw wastewater

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Experimental program
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Effect test

Embodiment 1

[0023] S1. Cleaning of suspended solids and other organic substances: discharge the wastewater generated after the chlor-alkali cleaning pulping process to the adjustment tank, buffer in the adjustment tank, set a suitable buffer time, and adjust the pH value of the wastewater in the adjustment tank , and carry out pre-aeration work. After this period of buffering, the wastewater is transported into the high-speed screw separator at a speed of 300r / min. After most of the suspended solids in the wastewater and organic substances in the suspended solid state are eliminated The high-speed spiral separator can only be turned off after it has been completely cleared;

[0024] S2. Anaerobic reaction treatment of wastewater: transport the wastewater after removing suspended solids in S1 to the anaerobic reactor, react in the anaerobic reactor for 3 hours, and remove most of the organic matter under the action of anaerobic microorganisms. The anaerobic reactor is stopped after the mat...

Embodiment 2

[0028] S1. Cleaning of suspended solids and other organic substances: discharge the wastewater generated after the chlor-alkali cleaning pulping process to the adjustment tank, buffer in the adjustment tank, set a suitable buffer time, and adjust the pH value of the wastewater in the adjustment tank , and carry out pre-aeration work. After this period of buffering, the wastewater is transported into the high-speed screw separator at a speed of 400r / min. After most of the suspended solids in the wastewater and organic substances in the suspended solid state are eliminated The high-speed spiral separator can only be turned off after it has been completely cleared;

[0029]S2. Anaerobic reaction treatment of wastewater: transport the wastewater after removing suspended solids in S1 to the anaerobic reactor, react in the anaerobic reactor for 4 hours, and remove most of the organic matter under the action of anaerobic microorganisms. The anaerobic reactor is stopped after the mate...

Embodiment 3

[0033] S1. Cleaning of suspended solids and other organic substances: discharge the wastewater generated after the chlor-alkali cleaning pulping process to the adjustment tank, buffer in the adjustment tank, set a suitable buffer time, and adjust the pH value of the wastewater in the adjustment tank , and carry out pre-aeration work. After this period of buffering, the wastewater is transported into the high-speed screw separator at a speed of 500r / min. After most of the suspended solids in the wastewater and the organic substances in the suspended solid state are eliminated The high-speed spiral separator can only be turned off after it has been completely cleared;

[0034] S2. Anaerobic reaction treatment of wastewater: transport the wastewater after removing suspended solids in S1 to the anaerobic reactor, react in the anaerobic reactor for 5 hours, and remove most of the organic matter under the action of anaerobic microorganisms. The anaerobic reactor is stopped after the...

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Abstract

The invention discloses integrated technology for treating wheat straw wastewater. The integrated technology specifically comprises the following steps: S1, cleaning organic substances such as suspended matters, wherein discharging wastewater generated after a chlor-alkali clean pulping process into an adjusting tank, buffering in the adjusting tank, setting proper buffering time, adjusting the pHvalue of the wastewater in the adjusting tank, and carrying out pre-aeration work. The invention belongs to the technical field of wastewater treatment. According to the integrated technology for treating wheat straw wastewater, the chlor-alkali clean pulping process is adopted; slurry can be formed under a low-temperature catalytic condition; less lignin is dissolved out; the degradation reaction degree of hemicellulose, and saccharides and carbohydrates hydrolyzed from hemicellulose is relatively low; according to the chlor-alkali clean pulping process, black liquor is not generated, the generated process liquid is low in pollution load (COD) and small in chroma, the pH value is only 7.5-8, pollutant emission, refractory organic matter and the like can be effectively reduced, and the process is environmentally friendly and does not cause secondary pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an integrated technology for treating wheat straw wastewater. Background technique [0002] Wheat straw is the collective name for the remaining parts of the wheat crop after harvesting. It generally includes leaves, stems, nodes, roots and other organs. The main components of wheat straw are extracts (non-structural sugars, proteins, etc.), cellulose, and hemifibers Lignin, lignin, ash, etc. As agricultural waste, the main treatment method at present is to return it directly to the field, and it can also be used as industrial raw materials, feed, and base material for mushroom cultivation. Now wheat straw is widely used as a renewable biomass resource. [0003] Wheat straw should be soft in texture, suitable for straw weaving, and also a good raw material for biogas. It can also be used to extract industrial starch, but the most used straw is used as the raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/281C02F1/283C02F1/285C02F1/38C02F1/56C02F1/66C02F1/72C02F1/76C02F1/78C02F3/2806C02F7/00C02F9/00C02F2001/007C02F2101/30
Inventor 唐倩倩幸建全李东旭许正伟
Owner XINJIANG ENVIRONMENTAL ENG TECH
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