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Soapstock acidification wastewater treatment process

A wastewater treatment and soapstock technology, applied in water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc., to achieve the effects of saving industrial water supply, reliable and continuous operation, and realizing the utilization of waste resources

Pending Publication Date: 2021-10-08
上海灿星环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of soapstock acidification waste water treatment process, to solve the problem that the current process that proposes in the above-mentioned background technology exists

Method used

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  • Soapstock acidification wastewater treatment process

Examples

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Effect test

Embodiment 1

[0061] An oil company in Dalian is located in Songmu Island Chemical Industry Park. The company is a large-scale private enterprise mainly engaged in the production, processing and research and development of soybean oil chemical products. It is currently one of the professional acidified oil processing enterprises in China. Raw materials are processed and produced by advanced "fatty acid continuous vacuum distillation technology" to produce oleic acid, stearic acid and other chemical products, extending the industrial chain of oils and fats and realizing the recycling of waste resources. This process produces a large amount of acidified wastewater . The wastewater quality is shown in Table 1 as follows:

[0062] Waste Water Quality Index

[0063]

[0064] Table 1

[0065] 1. Dosing to remove hard flocculation and sedimentation process

[0066] The soapstock acidification wastewater enters the isolation tank. After the oil separation tank is degreased, the soapstock acid...

Embodiment 2

[0092] A company in Hebei that processes acidified oil produces a large amount of saponoid acidified wastewater in the production process, with a production volume of 30t / d.

[0093] 1. Adding medicine to remove hard flocculation and sedimentation process:

[0094] The soapstock acidification wastewater first enters the grease trap, after degreasing in the grease trap, it is pumped into the dosing pool by the pump, and the pH is adjusted to weak alkaline (7-8) by adding caustic soda, and then enters the coagulation by adding soda ash to remove the hardness Sedimentation tank for sedimentation, there will be a lot of impurities in the wastewater: hardness such as Ca 2+ , Mg 2+ , suspended solids, neutral oil, fatty acid, etc. enter the sedimentation; the sedimentation part is discharged into the sludge concentration tank, and the press filter sludge is obtained after press filtration through a filter press, which is handed over to a unit with hazardous waste disposal qualifica...

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Abstract

The invention discloses a soapstock acidification wastewater treatment process. The process comprises the steps of dosing for removing hard flocculent precipitation, heating, centrifuging and removing floc, treating with a ceramic membrane, and evaporating at normal pressure for multi-phase separation. The method disclosed by the invention has the beneficial effects that the influence of grease, salt and the like in the soapstock acidification wastewater on a biochemical treatment process is avoided by adopting a multi-phase separation process of dosing for removing hard flocculent precipitation, a pre-heating centrifugal system, ceramic membrane filtration and normal-pressure evaporation; after flocculent precipitation and preheating centrifugation, suspended carclazyte (rich in a small amount of grease) is reduced to the maximum extent by adopting a ceramic membrane process, salt and glycerol in the wastewater can be effectively separated by adopting a normal-pressure evaporation multiphase separation process, and the whole process can be safely, stably and reliably operated; and industrial water supply is saved, waste resource utilization can be achieved through the whole scheme, and the environment-friendly and zero-emission requirements are met.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular to a process for treating soapstock acidified wastewater. Background technique [0002] Soapstock is a by-product of alkaline refining of animal and vegetable oils and a product of the deacidification process. Soapstock mainly contains fatty acid salt, that is, fatty acid sodium formed by the reaction of free fatty acid in oil and sodium hydroxide. Soapstock contains less neutral oils and more pigments and electrolytes. Fatty acid and acidified oil for biodiesel production can be obtained by adding excess strong acid such as sulfuric acid to soapstock, but this process will generate a large amount of acidified wastewater. [0003] In the process of preparing acidified oil from soapstock, sulfuric acid is used as acidifying agent and neutralizing agent, so that the salt content in the acidified wastewater increases and the pH decreases. This kind of high-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/40C02F1/66C02F1/5281C02F1/5245C02F1/56C02F11/122C02F1/38C02F1/44C02F1/04C02F2209/06C02F2209/02C02F2303/14C02F2301/046
Inventor 周宁娟李雪君吴鲲海
Owner 上海灿星环境科技有限公司
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