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Treatment device and treatment process for surfactant waste water

A surfactant and treatment process technology, applied in the field of surfactant wastewater treatment equipment, can solve problems such as harsh temperature and pH requirements, difficult stable operation of anaerobic system, serious foam generation, etc., to achieve simple operation and excellent effluent quality , Increase the effect of surface tension

Inactive Publication Date: 2015-03-25
SHANGHAI FINE CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the problems such as low removal rate and serious foam generation in current surfactant wastewater, the object of the present invention is to provide a treatment device and treatment process for surfactant wastewater. The purpose of the whole treatment system is as follows: (1) surface Active agent wastewater contains a large number of carbon chains between C8 and C12. These carbon chains have the effect of penetrating microbial cell walls, and it is often difficult for anaerobic systems to operate stably. Therefore, this system is designed to use a deep hydrolysis system with full formaldehyde fillers. On the one hand, it improves the biodegradability of wastewater and breaks the chain of foaming groups; on the other hand, it degrades the organic matter in wastewater and reduces the subsequent aerobic load; (2) the deep hydrolysis and aerobic contact oxidation system adopts modular treatment, adopts One module is processed in 12 hours, and the bottom is equipped with aeration tubes, which can be adjusted in any proportion. The fans are one for use and one for standby, which can reduce energy consumption when the water volume or water quality is good; (3) The system does not use physical and chemical pretreatment that is difficult to operate means (including electrolysis, micro-electrolysis, UASB system), which minimizes the user's operational complexity and operating costs, while the anaerobic hydrolysis system has less stringent temperature and pH requirements than the UASB system

Method used

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  • Treatment device and treatment process for surfactant waste water
  • Treatment device and treatment process for surfactant waste water

Examples

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Embodiment 1

[0041] A chemical company limited company uses alkyl glycoside (APG) series nonionic surfactants, alcohol ether carboxylate (AEC) series anionic surfactants, imidazoline series amphoteric surfactants and other new green products with market prospects, The production of surfactant wastewater is 100 tons / day, and the influent COD concentration is 3000-6000mg / L. After passing through the full-membrane anaerobic hydrolysis unit (residence time 36h) and the full-membrane aerobic treatment unit (residence time 36h), The COD concentration of the effluent (without adding PAC and PAM) is less than 200mg / L, and it will be discharged after reaching the water quality standard of Shanghai sewage into urban sewers.

[0042] figure 2 This is the SEM picture of the biofilm on the surface of the full-film aerobic unit. The microbial micelle is compact, and the main bacteria are rod-shaped microorganisms, which form a complete package of extracellular polymers and microorganisms, showing a hig...

Embodiment 2

[0044] In a certain anionic surfactant production enterprise, the wastewater concentration is 50 tons / day, the influent COD concentration is 20000mg / L, the surfactant concentration is 860mg / L, and the wastewater toxicity inhibition rate is 99.6%. After being treated by the process of the present invention, The anaerobic hydrolysis COD load is less than 2kg COD / (m3d), the full-film aerobic COD load is less than 1.5kg COD / (m3d), the concentration of the coagulant PAC is 150mg / L, and the concentration of PAM is 1mg / L. The COD concentration in the effluent of the floating system is less than 1000mg / L.

Embodiment 3

[0046] A certain non-ionic surfactant wastewater produces 200 tons / day, the incoming COD concentration is 6000mg / L, BOD / COD=0.1, after passing through the full-membrane anaerobic hydrolysis system, the effluent COD is 3000mg / L, BOD / COD=0.32 , after being treated by 6 modules of full-film aerobic units, the COD concentration of the effluent is less than 150mg / L.

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Abstract

The invention discloses a treatment device and treatment process for surfactant waste water. The varieties of surface active agents suitable for being treated comprise APG series nonionic surfactants, AEC series anion surfactants, and imidazoline series ampholytic surfactants. The COD concentration of the waste water suitable for being treated is smaller than 20,000 mg / L. The treatment device comprises a full film anaerobic hydrolysis treatment unit, a full film aerobic treatment unit, a gas floatation solid-liquid separation unit and a waste gas collecting and surface negative pressure defoaming device. The surface tension is increased and biodegradability is improved through the anaerobic process, the organic concentration of the waste water and biological film colloid remaining in solid and liquid separation through a gas floatation system are greatly reduced through the full film aerobic process, the generation quantity of foams is reduced through the surface negative pressure process formed through the water gas treatment system, and thus excellent outlet water quality is ensured. The treatment technology is efficient, easy to operate and high in adaptability and is the surfactant waste water treatment technology having development potential.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a treatment device for surfactant wastewater and a treatment process thereof. Background technique [0002] With the development of the national economy, the depth and measures of environmental governance at the national level are increasing. On the premise of effectively controlling non-point source pollution, the investment and construction speed of sewage stations have been increased, and urban pollution non-point source control and sewage pipe network have been realized. All over the situation, to curb the occurrence of large-scale pollution. [0003] Surfactants are used as performance additives in many industry formulations, such as personal and home care, and in countless industrial applications: metal treatment, industrial cleaning, oil extraction, pesticides, and more. Surfactants play an important role in changing surface tension and improving product qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 杨春光董万田姚学柱杨庆利王丰收孙一斌王海峰
Owner SHANGHAI FINE CHEM CO LTD