Combined treatment process for cotton pulping black liquid and saponin wastewater

A combined treatment and black liquor technology, applied in the field of environmental protection and wastewater treatment, can solve the problems of difficult operation and management of sewage treatment process facilities, high investment and operation costs of sewage treatment, and substandard effluent quality, achieving outstanding promotion and application value , Saving sewage treatment costs, and the effect of high-efficiency solid-liquid separation performance

Active Publication Date: 2014-03-12
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, many cotton pulp and saponin production enterprises are faced with the difficulty in the operation and management of sewage t

Method used

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  • Combined treatment process for cotton pulping black liquid and saponin wastewater
  • Combined treatment process for cotton pulping black liquid and saponin wastewater
  • Combined treatment process for cotton pulping black liquid and saponin wastewater

Examples

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with specific embodiments.

[0027] The flow chart of the joint treatment process of cotton pulp black liquor and saponin waste water provided by the present invention is as figure 1 As shown, in the actual operation of the factory, it is necessary to use various process treatment tanks for wastewater treatment.

[0028] The water quality of the selected cotton pulp black liquor and saponin wastewater in the present embodiment is as follows after testing:

[0029]

[0030] Discharge the cotton pulp black liquor and saponin waste water into their respective adjustment tanks according to the volume ratio of 1.1:1, and then lift the cotton pulp black liquor and saponin waste water to the mixed acid analysis tank through the lift pump, and then the mixed acid analysis tank Set the pH online monitoring, and monitor the pH value in the mixed acid analysis tank to be about 2.5, and the mixed solution is...

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Abstract

The invention provides a combined treatment process for cotton pulping black liquid and saponin wastewater. The combined treatment process comprises the steps of mixing the cotton pulping black liquid and the saponin wastewater, carrying out acidification on the mixed liquid, separating the mixed liquid and removing lignin and suspended solids dissolved out in the mixed liquid to obtain treating fluid A; adding zero-valent iron and hydrogen peroxide into the treating fluid A, stirring for reaction and completing the reaction to obtain treating fluid B, wherein the structures of complex macromolecule organic matters in the treating fluid B are damaged; adding lime slurry into the treating fluid B, regulating pH value of the treating fluid B to be neutral, converting sulfate ions in the treating fluid into calcium sulfate to be precipitated out and dissolved out, separating to remove the calcium sulfate to obtain treating fluid C; treating the treating fluid C by an anaerobic UASB (Upflow Anaerobic Sludge Blanket) reactor and an MBR (Membrane Biological Reactor) for aerobic biological treatment, separating by a membrane separation system to obtain final yielding water, and reutilizing the final yielding water or discharging. The combined treatment process can realize treatment of wastes with processes of wastes against one another, is energy-saving, reduces energy consumption, improves the wastewater reuse rate and reduces the water consumption.

Description

technical field [0001] The invention provides a process for treating industrial wastewater, in particular relates to a combined process for treating cotton pulp black liquor and saponin wastewater, and belongs to the technical fields of environmental protection and wastewater treatment. Background technique [0002] Cotton pulp black liquor and saponin wastewater are two of the most difficult wastewater to treat in the water pollution control industry today. Cotton pulp black liquor has the characteristics of high COD, high chroma, and high refractory degradation, while saponin waste water is known as the "king of waste water". The treatment of these two kinds of wastewater has always been a difficult problem that water pollution control workers have been studying and striving to overcome, and it is also a bottleneck restricting the development of related economic crop planting and processing industries. [0003] At present, although there are many academic papers and inven...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 李芙蓉鲍建国
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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