An organic-inorganic composite sewage treatment agent and its preparation method

Abstract

The invention discloses an organic-inorganic composite sewage treatment agent and a preparation method thereof. The composite treatment agent is prepared from the following raw materials in parts by weight: 6-8 parts of gelatin, 9-24 parts of cysteine, 9 ‑24 parts thioglycolic acid, 20‑24 parts sodium lignosulfonate, 22‑26 parts carboxymethyl chitosan, 12‑13 parts urea, 25‑27 parts limestone, 14‑16 parts meerschaum, 28‑30 parts Bentonite, 25‑30 parts of fly ash, 24‑28 parts of quicklime, 13‑15 parts of medical stone, 13‑15 parts of aluminum sulfate, 15‑17 parts of ferric chloride and 12‑14 parts of polyethyleneimine xanthic acid . The composite treatment agent of the present invention combines the advantages of inorganic mineral adsorbents and organic biopolymer flocculants, and the removal rates of heavy metals, COD, SS, TP, and TN in heavily polluted sewage have respectively reached more than 95%. The contents of heavy metals, COD, SS, TP, and TN in the river sewage are in line with the provisions of Category IV in Table 1 of the National Standard of the People's Republic of China, Surface Water Environmental Quality Standard GB3838‑2002.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an organic-inorganic composite sewage treatment agent and a preparation method thereof. Background technique [0002] With the acceleration of industrialization and the improvement of human living standards, the discharge of industrial wastewater and domestic sewage is increasing, and the problem of water pollution is becoming more and more serious, which makes people pay a heavy price. Due to the complex sources of industrial wastewater and domestic sewage, such as the different components of factory wastewater, it is necessary to research and develop a technology suitable for the treatment of various pollutants. [0003] The current sewage treatment methods can be divided into physical methods, chemical methods and biological methods according to their mechanism of action: physical methods mainly use physical effects to separate insoluble substances in sewage, and do not change ...

AI Technical Summary

Problems solved by technology

The flocculation method is to add a flocculant to the sewage to achieve the purpose of flocculation and sedimentation of the pollutants in the sewage. However, the existing flocculation and sedimentation methods often have the following problems: First, the flocculant is usually used together with the coagulant aid, and the effect of using it alone is not good. Second, flocculants and coagulants are less effective in treating high-turbidity or heavily polluted wastewater, and it is difficult to separate the treatment agent from sewage; third, flocculants are mostly powdery, and on the one hand, they are difficult to process during packaging, transportation, and use. The loss is large, which is easy to cause dust pollution. On the other hand, after adding sewage, the powder is easy to aggregate, which reduces the contact probability between the flocculant and the waste water, and reduces the utilization rate of the flocculant. At the same time, the sewage treatment process is long and occupies an area. Large area, high operating cost, easy to cause secondary pollution to water quality

Images