Treatment method for high-concentration phosphorus-containing wastewater
A treatment method and high-concentration technology, applied in the direction of neutralized water/sewage treatment, oxidized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve the problem of difficult to meet discharge standards, difficult to completely remove organic phosphorus and inorganic phosphorus, etc. problems, to achieve the effect of improving the reactivity, rapid and thorough phosphorus removal, and a wide range of phosphorus removal
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Embodiment 1
[0033] A treatment method for high-concentration phosphorus-containing wastewater:
[0034] Step a, take 10t of phosphorus-containing pesticide wastewater, measure wherein the inorganic phosphorus content is 1245mg / L and the organic phosphorus content is 2398mg / L, add a mass fraction of 10% calcium hydroxide solution to the pesticide wastewater, and adjust the pH to 7.5 , adding 0.45t of the above-mentioned calcium hydroxide solution with a mass fraction of 10%, carrying out the precipitation reaction for 0.5h, and filtering to obtain the primary treatment solution;
[0035] In step b, the primary treatment liquid is conditioned so that its calorific value reaches 3.9-4.5MJ / Kg, and then the conditioned waste liquid is added to a supercritical oxidation reaction device at a temperature of 600°C and a pressure of 23MPa Under the conditions of supercritical oxidation reaction, the reaction time is 3.5h, the temperature is lowered to 55°C, and the water is discharged to obtain 50t...
Embodiment 2
[0038] A treatment method for high-concentration phosphorus-containing wastewater:
[0039] Step a, take 10t of phosphorus-containing pesticide wastewater, measure the content of inorganic phosphorus to 6545mg / L and organic phosphorus to 8625mg / L, add calcium hydroxide solution with a mass fraction of 8% to the pesticide wastewater, and adjust the pH to 7.2 3.52 tons of the above-mentioned calcium hydroxide solution with a mass fraction of 8% were added, the precipitation reaction was carried out for 1.5 hours, and filtration was performed to obtain the primary treatment solution;
[0040] In step b, the primary treatment liquid is conditioned so that its calorific value reaches 3.9-4.5 MJ / Kg, and then the conditioned waste liquid is added to a supercritical oxidation reaction device at a temperature of 500°C and a pressure of 22.4 Under the condition of MPa, the supercritical oxidation reaction is carried out, the reaction time is 3.5h, the temperature is lowered to 50°C, and...
Embodiment 3
[0043] A treatment method for high-concentration phosphorus-containing wastewater:
[0044] Step a, get 10 tons of phosphorus-containing pesticide waste water, measure wherein inorganic phosphorus content is 5630mg / L and organic phosphorus content is 6851mg / L, in described pesticide waste water, add the calcium hydroxide solution that massfraction is 12%, adjust pH as 8.0, add 2.2t of the above-mentioned calcium hydroxide solution with a mass fraction of 12%, carry out the precipitation reaction for 1.0h, and filter to obtain the primary treatment solution;
[0045] In step b, the primary treatment liquid is conditioned so that its calorific value reaches 3.9-4.5MJ / Kg, and then the conditioned waste liquid is added to a supercritical oxidation reaction device at a temperature of 650°C and a pressure of 24MPa Under the conditions of supercritical oxidation reaction, the reaction time is 3.5h, the temperature is lowered to 50-60°C, and the water is discharged to obtain 50t of se...
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