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Stevia rebaudiana processing wastewater treatment system

A technology for processing waste water and treatment systems, applied in flotation water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as pollution and large fluctuations in pH value, and avoid environmental pollution Pollution, energy consumption and operating costs are low, and the effect of simple operation and management

Pending Publication Date: 2019-07-09
云南今业生态建设集团有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Stevia extraction industry wastewater contains high concentration of organic matter, the pH value fluctuates greatly, the color is dark, and the solid content reaches 10% to 12%. If it is directly discharged into natural water bodies, it will inevitably cause serious pollution

Method used

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  • Stevia rebaudiana processing wastewater treatment system
  • Stevia rebaudiana processing wastewater treatment system
  • Stevia rebaudiana processing wastewater treatment system

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Experimental program
Comparison scheme
Effect test

Embodiment

[0030] 1.1 Influent water quality

[0031] According to the information provided by the owner and referring to the water quality in the same industry, the designed influent water quality indicators are shown in Table 1-1:

[0032] Table 1-1 Raw water quality indicators

[0033]

[0034] 1.2 Outlet water quality

[0035] According to the requirements of the owner, the wastewater after treatment must meet the third-level standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996). The specific effluent quality indicators are shown in Table 2-2.

[0036] Table 2-2 Design effluent quality indicators

[0037]

[0038] 2.1 Process selection

[0039] According to the water quality, the BOD / COD value is about 0.3, and the biochemical property is good. Therefore, the biochemical treatment process is adopted as the core process. This process is mature, reliable and stable for this type of sewage process. And for the high concentration of raw water, the advanced tr...

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Abstract

The invention belongs to the field of wastewater treatment and specifically relates to a stevia rebaudiana processing wastewater treatment system. Wastewater automatically flows into a water collecting well after large-particle impurities are removed by using a grid, and the PH value is regulated; the wastewater is lifted to air flotation equipment by a lift pump after the pH value is regulated, and the wastewater automatically flows into a regulating (hydrolysis) tank; and an effluent of the regulating tank is lifted by the pump to enter a UASB anaerobic reactor, the effluent enters an anaerobic deposition tank for sludge-water separation, part of sludge is pumped into the UASB anaerobic reactor and is further used, a supernatant in the anaerobic deposition tank automatically flows into atwo-stage aerobic tank for aerobic treatment and then automatically flows into a secondary sedimentation tank, and an effluent from the secondary sedimentation tank is discharged to reach the standard. The sewage treated by a sewage treatment plant can meet the requirement of recycled water in a manufacturing workshop in the company, and thus, the production investment expense of the company is reduced while the local environmental pollution is avoided.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a stevia processing waste water treatment system. Background technique [0002] Stevioside is a glycoside extracted from Stevia rebaudiana, which is an effective ingredient in the treatment of diabetes. In the stevioside extraction process, water is used as the extraction agent, chemical auxiliary materials such as calcium hydroxide and ferric chloride are added as flocculants in the production process, ethanol is added as a reagent for analysis, and the resin is backwashed with strong acid and alkali from time to time, resulting in Large amount of sewage discharge and unstable water quality. COD in wastewater Cr It is 7000~10000mg / L, and hydrochloric acid, neutralized lime and alcohol are added during the processing. Stevia extraction industry waste water contains high concentration of organic matter, the pH value fluctuates greatly, the color is dark, and the...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/122
CPCC02F9/00C02F11/122C02F1/001C02F1/66C02F3/30C02F2001/007C02F1/24
Inventor 邓辅商邓辅唐曾郴林
Owner 云南今业生态建设集团有限公司
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