Environment-friendly wastewater treatment process of fish skin gelatin

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...

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