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Treatment method of 1,3-propanediol production wastewater

A technology for the production of waste water and treatment methods, which is applied in the directions of water/sewage multi-stage treatment, heating water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of difficult adaptation, high treatment cost, high concentration and high salt content organic waste water no problem

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, on the one hand, this method has the problems of high consumption of chemical oxidants, high treatment costs, and secondary pollution of iron ions in the treated water; on the other hand, due to the high concentration of inorganic salts in the crude glycerol fermentation wastewater, Biological bacteria in traditional biochemical treatment such as UASB and SBR will be difficult to adapt or be inhibited, and cannot meet the standard discharge treatment of 1,3-propanediol wastewater produced by crude glycerol fermentation
CN101700950A proposes a method for treating high-concentration fermentation wastewater, using anaerobic baffle reactors and membrane bioreactors in series to treat high-concentration fermentation wastewater, but the main solution is the optimization and land occupation of traditional biological processes and reactors, and does not involve The adaptation and inhibition of biological bacteria in fermentation wastewater with high inorganic salt content still cannot be used for the treatment of crude glycerin fermentation wastewater
[0004] Based on the above analysis, there is no technically reliable, economically feasible, stable and up-to-standard treatment technology for the high-concentration and high-salt organic wastewater produced in the process of crude glycerin fermentation to produce 1,3-propanediol

Method used

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  • Treatment method of 1,3-propanediol production wastewater

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Embodiment 1

[0031] The 1,3-propanediol production wastewater is treated by the treatment method of the invention. The waste water is produced from crude glycerin, the main by-product of the biodiesel industry, using crude glycerol substrate fermentation, plate and frame filtration, ultrafiltration, electrodialysis, membrane evaporation, crude distillation and rectification to produce the final product1 ,3-Propanediol is produced in the process. The waste water produced mainly includes tank washing water in the fermentation process, filter cloth washing water in the plate and frame filtration process, membrane cleaning liquid in the membrane filtration process, concentrated liquid in the electrodialysis separation process, distillate in the distillation process, etc. Among them, the concentrated solution discharged from the electrodialysis separation process is a kind of high-concentration, high-salt organic wastewater, and its discharge accounts for about 25wt% of the total wastewater dis...

Embodiment 2

[0037] The treatment device of Example 1 was used to treat the same sewage as in Example 1, and the wastewater treatment effects obtained by changing the operating conditions of each treatment unit are shown in Table 2.

[0038] Table 2 Main processing unit composition and processing effect of embodiment 2

[0039] Handling unit name Processing device scale and main components Main operating conditions and control parameters Treatment effluent or effect 1 Multi-effect evaporation Falling film five-effect evaporation test device, made of glass. The wastewater treatment scale of the device is 50mL / h, mainly including evaporation column, preheater, condenser and enamel crystallization tank Continuous operation, the external steam supply is 0.4MPa saturated steam, the consumption is 18g / h; the evaporation water volume of each effect is 12.2, 10.3, 8.7, 7.6, 6.2mL / h; the concentrated solution is 5.0mL / h, and the circulating water is used to cool and crystall...

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Abstract

The invention relates to a treatment method of 1,3-propanediol production wastewater, and the method is used for treating high-concentration organic wastewater from fermentation production of 1,3-propanediol from a raw material of crude glycerin. The method employs multiple-effect evaporation treatment, the evaporation cooling condensate is mixed with drainage water from other production processes, the mixture is subjected to combined treatment including upflow-type anaerobic sludge bed fermentation, first stage aerobic biochemical treatment, ozone oxidation and second stage aerobic biochemical treatment, and the treated water outlet reaches the standards and can be directly discharged. The method has the characteristics of achieving standard discharge of high-concentration organic wastewater with high salt content, effectively recycling and comprehensively utilizing waste materials in the wastewater, and converting high-concentration organic pollutants into methane for resource utilization, and is in line with the requirements of circular economy and cleaner production.

Description

technical field [0001] The invention relates to a treatment method for 1,3-propanediol production wastewater, in particular to the treatment of high-concentration organic wastewater in the process of producing 1,3-propanediol by fermentation using crude glycerin as raw material. Background technique [0002] 1,3-Propanediol is an important chemical raw material, mainly used in polymer synthesis industries such as polyester and polyether, pharmaceutical intermediates, plasticizers, detergents, preservatives, antifreeze agents, emulsifiers and other synthetic industries. Its preparation method is mainly divided into chemical synthesis method and biosynthesis method. Due to the shortcomings of chemical synthesis method, such as large equipment investment, high raw material price, high technical difficulty, and large heavy metal pollution, it is more and more replaced by biosynthesis method. . Biosynthesis methods are mainly divided into glucose route and glycerol route accordi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/78C02F1/04
Inventor 郭宏山陈中涛张蕾李建涛许莹
Owner CHINA PETROLEUM & CHEM CORP
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