Treating and recycling method for pesticide intermediate wastewater
A technology for intermediates and waste water, which is applied in the treatment and reuse of pesticide intermediate waste water. It can solve the problems that the effluent is difficult to meet the national discharge standard, the profit margin of the product is reduced, and the by-products are difficult to degrade. Processing cost and cost reduction effect
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Embodiment 1
[0024] With a processing capacity of 6 tons per hour, design, install and debug each treatment device of the whole process, and finally conduct a field test, and conduct a pilot test on the pickling and alkali washing wastewater produced by a pesticide intermediate factory:
[0025] 1. The pH of the alkali washing wastewater in the factory is 13.6, COD cr is 220000mg / L, the pH of pickling wastewater is 1.4, COD cr 30000mg / L;
[0026] 2. The pickling and alkaline washing wastewater are sent to the flocculation tank through centrifugal pumps for flocculation treatment, in which the flocculant is polyaluminum chloride, the dosage is 50 g / ton of wastewater, and the coagulant is polyacrylamide with a molecular weight of 18 million. The dosage is 3 grams per ton of waste water, and the settling time is 1 hour;
[0027] 3. The supernatant after the flocculation and sedimentation treatment is passed into the sand filter tank device through the centrifugal pump, wherein the pomegrana...
Embodiment 2
[0033] With a treatment capacity of 4 tons per hour, the design, installation and commissioning of each treatment device in the whole process was carried out, and finally a field test was carried out, and a pilot test was carried out on the pickling and alkali washing wastewater produced by a pesticide intermediate factory:
[0034] 1. The pH of the alkali washing wastewater in the factory is 13.6, COD cr is 226000mg / L, pH of pickling wastewater is 1.2, COD cr 31000mg / L;
[0035] 2. The wastewater from pickling and alkali washing is sent to the flocculation tank through centrifugal pumps for flocculation treatment. The flocculant is polyaluminum chloride, the dosage is 60 g / ton of wastewater, and the coagulant is polyacrylamide with a molecular weight of 18 million. The dosage is 4 grams / ton of waste water, and the settling time is 1.5 hours;
[0036] 3. The supernatant after the flocculation and sedimentation treatment is passed into the sand filter tank device through the ...
Embodiment 3
[0042] Design, install and debug each treatment device of the whole process with a treatment capacity of 2 tons per hour, and finally conduct a field test, and conduct a pilot test on the pickling and alkali washing wastewater produced by a pesticide intermediate factory:
[0043] 1. The pH of the alkali washing wastewater in the factory is 13.8, the COD cr 228000mg / L, pH of pickling wastewater is 1.1, COD cr 32000mg / L;
[0044] 2. The wastewater from pickling and alkali washing is sent to the flocculation tank by centrifugal pumps respectively for flocculation treatment. The flocculant is polyaluminum chloride, the dosage is 70 g / ton of wastewater, and the coagulant is polyacrylamide with a molecular weight of 18 million. The dosage is 5 grams per ton of waste water, and the settling time is 2 hours;
[0045] 3. The supernatant after the flocculation and sedimentation treatment is passed into the sand filter tank device through the centrifugal pump, wherein the pomegranate ...
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Abstract
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