Treatment method of sheep fur pretreatment processing wastewater and application
A treatment method and technology for processing wastewater, applied in animal processing wastewater treatment, water/sewage treatment, chemical instruments and methods, etc.
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Embodiment 1
[0030] The method for treating soaking wastewater from pretreatment of sheep fur comprises the following steps:
[0031] 1) Add calcium chloride and calcium sulfate of 0.2wt% by weight of waste water, aluminum sulfate and ammonium aluminum sulfate of 0.6wt%, stir to make them all melt, heat up to 50°C through steam, stand still for 4-6h to break the emulsion, remove the floating Grease on the surface of wastewater;
[0032] 2) Add a small amount of sodium hydroxide, adjust the pH value of the wastewater to 6-7, stir at a high speed for 1 minute, stir at a medium speed for 6 minutes, stir at a low speed for 4 minutes, stir at a slow speed for 5 minutes, stand still for 4-6 hours to precipitate the flocs, suck out clean water, and remove the precipitate things.
[0033] The treated waste water can be recycled for 8 times, the chemical oxygen consumption is 1000-2000 mg / L, the oil content is ≤0.2%, the pH value is 6-7, the appearance is colorless or light yellow and transparent,...
Embodiment 2
[0035] The method for treating soaking wastewater from pretreatment of sheep fur comprises the following steps:
[0036] 1) Add 1.0wt% sodium chloride, 0.2wt% potassium aluminum sulfate, and sodium aluminum sulfate to the waste water, stir to make them all melt, heat up to 90°C by steaming, stand still for 4-6h to break the emulsion, and remove the water floating on the surface of the waste water grease;
[0037] 2) Add a small amount of potassium hydroxide, adjust the pH value of the wastewater to 6-7, stir at 400rpm at high speed for 2min, at 200rpm at medium speed for 5min, at 150rpm at low speed for 5min, at 50rpm for 3min, stand still for 4-6h to precipitate the flocs, and suck out Clean water to remove sediment.
[0038] The waste water after the above treatment can be recycled for 10 times, the chemical oxygen consumption is 1000-2000 mg / L, the oil content is ≤0.2%, the pH value is 6-7, the appearance is colorless or slightly yellow and transparent, and no suspended ma...
Embodiment 3
[0040]The method for treating wool scouring waste water from pre-treatment of sheep fur comprises the following steps:
[0041] 1) Add 1.0wt% sodium chloride, 0.2wt% aluminum potassium sulfate, and aluminum sodium sulfate to the weight of the waste water, stir to make them all melt, heat up to 70°C with steam, stand still for 4-6h to break the emulsion, and remove the water floating on the surface of the waste water grease;
[0042] 2) Add a small amount of potassium hydroxide, adjust the pH value of the wastewater to 6-7, stir at 500rpm at high speed for 2min, at 300rpm at medium speed for 7min, at 100rpm at low speed for 4min, at 100rpm at slow speed for 3min, stand still for 4-6h to precipitate the flocs, and suck out Clean water to remove sediment.
[0043] The waste water after the above treatment can be recycled for 10 times, the chemical oxygen consumption is 1000-2000 mg / L, the oil content is ≤0.2%, the pH value is 6-7, the appearance is colorless or slightly yellow a...
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