Method of treating high-concentration metaformaldehyde waste water into reuse water

A technology for wastewater treatment and polyformaldehyde, which is applied in the direction of flotation water/sewage treatment, adsorption water/sewage treatment, neutralization water/sewage treatment, etc. Problems such as high content of toxic organic matter, to achieve the effect of improving the impact resistance of water quantity and water quality, increasing the concentration of microorganisms, and saving costs

Inactive Publication Date: 2010-03-17
上海中耀环保实业有限公司
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Problems solved by technology

Although these biological processes can effectively remove COD and formaldehyde in wastewater, due to the characteristics of high content of toxic organic substances and large fluctuations in water quality in formaldehyde wastewater, microbial activity is still easily inhibited, COD is difficult to meet the standard, and formaldehyde treatment effect is easily affected by water quality. Problems that take a long time to recover from shocks

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  • Method of treating high-concentration metaformaldehyde waste water into reuse water
  • Method of treating high-concentration metaformaldehyde waste water into reuse water

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Embodiment Construction

[0027] see figure 1 , The technique of the present invention does not add any dilution water. The volume of high-concentration polyoxymethylene wastewater in a polyoxymethylene factory is 1800m 3 / d. The sources of wastewater are: a. Wastewater from monomer workshops, with a water volume of 28.6m 3 / h; b. Wastewater from polymerization workshop, water volume 13m 3 / h; c, domestic wastewater, water volume 7.7m 3 / h; d, initial rainwater, water volume 96m 3 / Second-rate;

[0028] A, first carry out physical and chemical pretreatment

[0029]The wastewater from a, b, c, and d first enters the regulating tank, and the measured formaldehyde content is 1500-4000mg / L. Add alkali to the tank to adjust the pH of the wastewater to about 3.5, and then stir to make the water quality uniform. Use a pump to 30~45m 3 / h is sent to the cooling tower for cooling to meet the water temperature requirements of the subsequent process, and the effluent from the cooling tower automatically f...

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Abstract

The invention discloses a method of treating high-concentration metaformaldehyde waste water into reuse water, relating to a treatment technology of high-concentration metaformaldehyde waste water. The pH of metaformaldehyde waste water of which the formaldehyde content is 4000mg/L into 3.0-4.0, then metaformaldehyde waste water is sent into an anaerobic hydrolysis composite reactor combining activated sludge with biomembrane and an aerobic composite reactor; at last, a double-membrane method is adopted to treat to ensure that effluent reaches the standard of urban wastewater recycling industrial water quality, thus serving as recirculated cooling water. The invention strengthens removal of high-concentration formaldehyde, COD, trioxymethylene, divinylene oxide and other pollutants in high-concentration metaformaldehyde waste water by biological treatment, can effectively resist impact from violent water yield and water quality, and has the advantages of high system starting speed, small foam of the aerobic composite reactor, low operation cost, stable and effective treatment and zero discharge of waste water.

Description

technical field [0001] The invention discloses a method for treating high-concentration polyoxymethylene wastewater into reuse water, and relates to a treatment process for high-concentration polyoxymethylene wastewater. The invention belongs to the technical field of wastewater treatment in environmental engineering technology. Background technique [0002] At present, domestic research and application are limited to the treatment of formaldehyde wastewater, and have not involved the treatment of POM wastewater containing paraformaldehyde and dioxane. Organic pollutants in high-concentration POM wastewater mainly include formaldehyde, methanol, benzene, paraformaldehyde, and dioxane, among which formaldehyde can directly react with proteins, DNA, and RNA in microorganisms, leading to the death of microorganisms or inhibiting their biological processes. active. When the formaldehyde concentration reaches 150mg / L, the microbial activity is half of the original activity, and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/24C02F1/28C02F1/44C02F1/66
CPCY02A20/131
Inventor 刘霞贾志宇卢毅明邹平
Owner 上海中耀环保实业有限公司
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