Polycaprolactone (PLC) particles for sewage nitrogen removal treatment device

Abstract

The invention discloses polycaprolactone (PLC) particles for a sewage nitrogen removal treatment device. The PLC particles have an average particle size of 3-3.5mm, a specific surface area of 0.87m<2> / L, real density of 1.12kg / L and filling density of 0.74kg / L. The PLC particles for the sewage nitrogen removal treatment device have good nitrogen removal effects.

Description

technical field [0001] The invention relates to a polycaprolactone particle for a sewage denitrification treatment device based on an artificially synthesized biodegradable polymer, which is specially aimed at the deep denitrification treatment of rural distributed domestic sewage. Background technique [0002] In recent years, with the rapid development of economy and society, the total nitrogen load of the decentralized sewage treatment system used to solve the problem of non-point source pollution in rural areas is increasing. However, although the upper limit of the total nitrogen concentration in my country's pollutant discharge standards (Class A standard is 15mg / L) is much higher than the maximum allowable values ​​stipulated by the United States and the European Union (respectively 3mg / L and 8mg / L), the decentralized The total nitrogen in the effluent of the sewage treatment system is still high, and a large amount of nitrogen nutrients are discharged into the environ...

AI Technical Summary

Problems solved by technology

However, there are many hidden dangers in its device and method.

For example, the top-down water flow mode is easy to form short flow and contact blind area; the addition of activated carbon, zeolite and other materials will cause the device to be easily blocked and need to be replaced frequently; the raw water pollution of drinking water is low, and there is no treatment for solid carbon sources Demonstrate the characteristics of sewage with higher total nitrogen concentration, etc.

Another example is in the patent application for "an ecological barrier column and method for removing underground subsurface flow pollution (CN 103224286 A)", the outer frame made of solid carbon source is filled with polymers such as activated carbon, and buried in the ground to reduce pollution. However, this technology will consume the total nitrogen in the soil leachate by using solid-phase carbon sources, and these total nitrogen are likely to be nitrogen nutrients needed by plants, thus causing solid-phase Unnecessary consumption and waste of carbon sources; at the same time, after being buried underground, the high content of suspended solids in the subsurface sewage can easily lead to blockage of activated carbon. The above-mentioned defects did not propose a good solution in this patent

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