Environment-friendly wastewater treatment process of fish skin gelatin
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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
Inactive Publication Date: 2022-03-25
山东恒鑫生物科技有限公司
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[0003] The collagen content in fish skin is relatively higher than that of pig skin, and the fat content in pig skin is higher than that of fish skin. Wastewater will be generated during the production of fish skin gelatin, and sedimentation sludge will be generated during wastewater treatment. The sludge treatment is sewage treatment The end link is also the most labor-intensive link, and it is usually impossible to recycle it. If the sedimentation sludge produced is used effectively, it will greatly affect the environmental protection index of gelatin wastewater treatment
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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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Abstract
The invention relates to an environment-friendly wastewater treatment process for fish skin gelatin. The environment-friendly wastewater treatment process comprises the following steps: S1, carrying out filter pressing on sludge in a pre-sedimentation tank through a first filter press; s2, carrying out filter pressing on the sludge in the adjusting tank through a second filter press; s3, the wastewater subjected to the flocculation reaction enters a primary sedimentation tank, a mixed flocculant comprises FeSO4, PAC and PAM according to the ratio of 100: (10-20): (10-20), sludge is subjected to filter pressing through a third filter press, and filter pressing tail water enters a standby tank; s4, the wastewater enters a secondary sedimentation tank, sludge is subjected to filter pressing through a fourth filter press, filter pressing tail water enters a standby tank, and mud cakes subjected to filter pressing through the filter presses all enter a batching tank; s5, the weight ratio of the mud cake to the coal gangue in the batching pool is 20: 1-25: 1; s6, mold fixing; s7, a first drying section; s8, pricking holes; s9, a second drying section; s10, an anti-cracking working section; and S11, a third drying section. According to the invention, multi-stage precipitation is carried out, and the generated precipitated sludge is intensively and effectively utilized, so that the environmental protection index of gelatin wastewater treatment is improved while economic benefits are generated.
Description
technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an environment-friendly wastewater treatment process for fish skin gelatin. Background technique [0002] Gelatin, the main component of fish skin, is a high-quality and high-grade material, which is widely used in the fields of medicine, food and cosmetics. Animal tissues from livestock and poultry have always been the main source for people to obtain gelatin, but due to the occurrence of mad cow disease, foot-and-mouth disease, avian influenza and other diseases, people have questioned the safety of animal gelatin from livestock and poultry, and religious belief factors have also made the application of gelatin from livestock and poultry restricted. In contrast, aquatic gelatin has obvious advantages in the above aspects. At the same time, aquatic gelatin has the advantages of low antigenicity, hypoallergenicity, and high solubility, and can gradually replace anim...
Claims
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