Environment-friendly wastewater treatment process of fish skin gelatin
A wastewater treatment and fish skin gelatin technology, which is applied in animal processing wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of high labor intensity and affect the environmental protection index of gelatin wastewater treatment, and improve the firing efficiency , shorten the firing time, strengthen the effect of internal structure strength
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Embodiment 1
[0037] An environment-friendly wastewater treatment process for fish skin gelatin, comprising the following steps:
[0038] S1, the waste water is introduced into the pre-sedimentation tank 1, after natural quieting, the supernatant in the pre-sedimentation tank 1 is discharged into the regulating tank 2, and the sludge in the pre-sedimentation tank 1 is filtered by the first filter press 7, The filtered tail water returns to the pre-sedimentation tank 1, and the mud cake is discharged into the batching tank 11;
[0039] S2, the pH value of the wastewater in the regulating tank 2 is adjusted to 8.5 by adding concentrated sulfuric acid, the re-precipitated wastewater supernatant enters the flocculation reaction tank 3, and the re-precipitated sludge in the regulating tank 2 is processed by the second filter press 8 Pressure filtration, the tail water of the pressure filtration returns to the adjustment tank 2, and the mud cake is discharged into the batching tank 11;
[0040] ...
Embodiment 2
[0060] Parts not mentioned in this embodiment are as described in the foregoing embodiments.
[0061] In this example:
[0062] In step S2, the pH value of the wastewater in the regulating tank 2 is adjusted to 9.5, the re-precipitated wastewater supernatant enters the flocculation reaction tank 3, and the re-sedimented sludge in the regulating tank 2 is filtered through the second filter press 8 , the press-filtered tail water returns to the adjustment tank 2, and the mud cake is discharged into the batching tank 11;
[0063] In step S5, the batching weight ratio in the batching tank 11 is mud cake: coal gangue=25:1, and the moisture content of the mud cake is 70%;
[0064] In step S7, the fixed mold car 24 enters the first drying section 19, the baking temperature is 40°C, and the baking time is 15 minutes;
[0065] In step S9, enter the second drying section 20 for baking, the baking temperature is 60°C, and the baking time is 10 minutes;
[0066] In step S11, enter the ...
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