Light filtering material used for sewage treatment of oily waste water

Abstract

The invention discloses a light filtering material used for sewage treatment of oily waste water. The filtering material comprises, by weight, 100 parts of active carbon, 32-45 parts of cotton, 32-40 parts of zeolite and 3-8 parts of bentonite. The light filtering material used for sewage treatment of the oily waste water is developed according to the characteristics of the oily waste water, the adsorption capacity is greater, the density of the used materials is low, so that the filtering material of unit volume is lighter, and the cost of water treatment is reduced.

Description

technical field [0001] The invention relates to a lightweight filter material used for the treatment of oily wastewater. Background technique [0002] Oily wastewater mainly comes from petroleum, petrochemical, steel, coking, gas generation stations, mechanical processing and other industrial sectors. The relative density of oil pollutants in wastewater is less than 1 except heavy tar whose relative density is above 1.1. [0003] Oily substances contained in oily wastewater include natural petroleum, petroleum products, tar and its fractions, and edible animal and vegetable oils and fats. In terms of pollution to water bodies, it is mainly oil and tar. Due to the great difference in the oil concentration in the wastewater discharged from different industrial sectors, such as the wastewater generated in the refining process, the oil content is about 150-1000mg / L, the tar content in the coking wastewater is about 500-800mg / L, and the wastewater discharged from the gas genera...

AI Technical Summary

Problems solved by technology

The impact of oil substances on the environment is multifaceted, such as polluting the water body, forming an oil film on the water surface, which can hinder the reoxygenation of the water body, and due to the reduction of dissolved oxygen in the water body, the photosynthesis of algae is limited, affecting the normal growth of aquatic organisms, making Aquatic plants and animals have oily smell or toxicity, and even make the water body smelly, destroying the utilization value of water resources; the oil adheres to the gills of the fish, which can suffocate the fish. When the concentration is 200mg / L, the fish cannot survive; it adheres to the algae , plankton, can kill them; oil will inhibit waterfowl spawning and hatching, and in severe cases, a large number of birds will die; if oily wastewater is used to irrigate farmland, oil and its derivatives will cover the surface of soil and plants, blocking the soil Pores prevent air from penetrating, prevent soil and microorganisms from performing normal metabolism, reduce the quality and practical value of agricultural products, and cause crop yield reduction or death in severe cases, oil migrates downward in the soil, and may cause serious groundwater pollution

[0008] To sum up, oily wastewater pollution may cause devastating damage to the ecosystem, and also cause potential harm to human health