Pesticide wastewater treatment

Description

There are a wide variety of pesticides and the water quality of wastewater is complex. Its main characteristics are:

1) The pollutant concentration is high, and the COD can reach tens of thousands of mg/L;
2) It is highly toxic. In addition to pesticides and intermediates, the wastewater also contains toxic substances such as phenol, arsenic, mercury, and many substances that are difficult to degrade by organisms;
3) It has a foul odor and is irritating to the human respiratory tract and mucous membranes;
4) The water quality and quantity are unstable, and the seasonal changes are large.

How to deal with formaldehyde-containing pesticide wastewater?

Formaldehyde is a toxic, mutagenic and carcinogenic organic substance. Pesticide wastewater containing formaldehyde is one of the highly toxic and difficult-to-treat chemical wastewaters.

Is there a technology or solution that can not only effectively help pesticide companies deal with formaldehyde-containing pesticide wastewater, but also scientifically and reasonably control investment and operating costs?

Approach:

(1) When the formaldehyde concentration is above 5000 mg/L, the formaldehyde is recovered by steam stripping;

(2) When the formaldehyde concentration is 1000-10000 mg/L, the lime condensation method can be used for pretreatment, and the formaldehyde in the wastewater is converted into substances with lower biological toxicity, and then treated by the microorganism method.

(3) When the formaldehyde concentration is within 2000 mg/L, the sodium sulfite reduction method can be used for pretreatment, and the reduction of sodium sulfite can be used to reduce aldehydes to alcohols, reduce the toxicity of wastewater, and improve the biodegradability, and then use the microbial method for treatment. The method has mild reaction conditions, high efficiency, and no secondary pollution. The disadvantage is that the operation cost is relatively high.

(4) For pesticide wastewater with a formaldehyde concentration of less than 1000 mg/L, it is recommended to use the microbial method. The “LBQ compound microbial flora” used in this method can withstand the toxicity of 1000 mg/L formaldehyde-containing wastewater, and at the same time effectively degrade various organic substances in the wastewater. pollutants, ensure that the formaldehyde concentration in the effluent is below 0.1 mg/L. The main advantages of biological method are good effect and low cost.

(5) For pesticide wastewater with low formaldehyde concentration, the “AOP oxidation” technology can be preferentially used, so that the formaldehyde concentration in the effluent is less than 0.5 mg/L.

Get A Free Quote

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

FAQ

A: We have one year quality guarantee, our customers have used our machines for a long time.
A: Choose the products what you like, or send us your requirement, our engineer can make a project and quotation for you. (After confirming all details and signing the contract, you can do deposit or make the LC, then we produce it ,We deliver these machines by ship according to our agreement. We send the documents to you after shipment).
A: T/T and Irrevocable LC payment can be accept.
A: 2-3 months (depends on the style of the machine).
A: We are located in Jangsu China, which is nearby Shanghai, you can take the flight to Shanghai airport,We will arrange the driver to pick you up. You are welcome to visit our factory.
Our products are welcomed in the Mid East,Eastern Asia, Africa and the united states, and domestic with high quality low price and top-grade services. If you have any quostions, please feel free to contact with us at any time.
Scroll to Top
Scroll to Top