Plastic is an important raw material in our production and life. Plastic products can be seen everywhere in our life, and the consumption is increasing. Plastic waste is a recyclable resource. Generally speaking, they are crushed and cleaned, made into plastic particles and reused. In the process of plastic cleaning, a large amount of waste water will be produced. Wastewater mainly contains sediment and other impurities attached to the plastic surface. If discharged directly without treatment, it will pollute the environment and waste water resources.
Principle of plastic cleaning sewage treatment
The pollutants in plastic sewage are divided into dissolved pollutants and insoluble pollutants (i.e. SS). Under certain conditions, dissolved organic matter can be transformed into non-soluble substances. One of the methods of plastic sewage treatment is to add coagulants and flocculants, convert most of the dissolved organic matter into insoluble substances, and then remove all or most of the non soluble substances (i.e. SS) to achieve the purpose of purifying sewage.
Plastic cleaning sewage treatment process
The plastic particle flushing sewage is collected by the collection pipe network and flows into the grid channel by itself. The large suspended solids in the water are removed through the fine grid, and then flows into the regulating pool by itself to regulate the water volume and uniform water quality; The regulating tank is equipped with sewage lift pump and liquid level controller. When the water level reaches the limit, the pump will lift the sewage to the air flotation sedimentation integrated machine. In the system, by releasing dissolved gas and water, the suspended solids in the water are attached to the water surface by small bubbles, and the suspended solids are scraped to the sludge tank by the slag scraping equipment to remove suspended organic matter; The heavy organic matter slowly slides to the bottom of the equipment along the inclined pipe filler, and is discharged into the sludge tank through the sludge discharge valve. The supernatant treated by the equipment flows into the buffer pool by itself, regulates the water volume and uniform water quality in the buffer pool, and then lifts it from the sewage lift pump to the multi-media filter to remove the remaining pollutants in the water through filtration and activated carbon adsorption. The scum of the air flotation tank and the settled sludge of the sludge discharge pipe are discharged into the sludge storage tank for regular transportation and treatment, and the purified sewage can be discharged up to the standard.
Post time: Aug-05-2022