Water treatment device comprising circular pipe filling and use method

Abstract

The invention discloses a water treatment device comprising circular pipe filling and a use method and belongs to the technical field of water treatment. The water treatment device comprises a tank body reaction system, a gas distribution system and a water distribution system, wherein gas is supplied to a gas distribution pipe via adjustment and opening of an aeration pipe, the gas distribution pipe and a pulse pipe in a gas distribution area; the pulse pipe is connected with a gas storage tank from a high pressure fan via an adjustment valve; an outlet is connected with the pulse pipe via areducing valve, an electromagnetic valve and an adjustment valve; the circular pipe filling is 3-6mm in outer diameter D, 10-30mm in length L, 0.5-1mm in pipe wall thickness h and 1.05-1.2g/cm<3> in density rho; U-shaped notches are formed at the two ends of circular pipes; and the circular pipes are made from PVC (polyvinyl chloride). An operating state of the filling can be changed by adjustinga gas distribution valve according to influent quality. The device is used for biochemical sewage treatment and has a good synchronous treatment effect on C, N and P; the working state of the fillingcan be adjusted according to different C/N ratios; back flushing is easy and low in energy consumption; the possibility of blocking is low; the surface area per unit volume is large; and the device issimple to manufacture.

Description

Technical field: [0001] The invention belongs to the technical field of water treatment, and in particular relates to a water treatment device containing a circular tube filler and a use method thereof. Background technique: [0002] For urban sewage treatment, the biofilm method has a stable effect in water treatment technology and is easy to manage; the structure of the filler affects the living environment of the filler microorganisms, which in turn affects the removal of pollutants in the sewage. For the treatment of domestic sewage in cities and towns, there are many deficiencies in the existing fillers: ① Suspended fillers can easily lead to the growth and accumulation of biofilms, making it difficult for aging biofilms to fall off. The effective use surface of fillers is greatly weakened, and too much aeration will cause biological Excessive film shedding. ② Suspended filler, excessive fluidization, lack of anaerobic components, poor nitrogen and phosphorus removal e...

AI Technical Summary

Problems solved by technology

For the treatment of domestic sewage in cities and towns, there are many deficiencies in the existing fillers: ① Suspended fillers can easily lead to the growth and accumulation of biofilms, making it difficult for aging biofilms to fall off. The effective use surface of fillers is greatly weakened, and too much aeration will cause biological Excessive membrane shedding

②Suspended filler, excessive fluidization, lack of anaerobic components, poor nitrogen and phosphorus removal effect, need to add secondary anaerobic treatment structure

③Sinking filler, after absorbing water and forming film, the weight of biological filler is increased and the accumulation is dense. If backwashing is not timely, it is easy to cause blockage of filler, resulting in uneven air distribution and affecting normal operation.

[0003] Chinese patent CN103951044A discloses a new type of non-sintering fast film-hanging bio-filler and its preparation method. This method still has the problem that the prepared filler has a large proportion, and it is easy to block and difficult to backwash after accumulation and sinking.

The length of the filler is 4-8cm, the diameter is 2-4cm, and the micropore diameter at one end of the closure is 5mm-10mm. The pore diameter of the filler is too large, which is not conducive to the formation of a stable facultative anaerobic microenvironment under aerobic aeration conditions. The gradient oxygen content Difficult and easy to realize; at the same time, the structural design of closed or several micropores at one end, the packing structure is uneven, and the state in the reactor is single, which is not conducive to fluidization, which will easily lead to slow shedding of aging biofilm and poor water treatment effect

The cylindrical organic biological carrier used for wastewater bioenhanced treatment has a hollow cylindrical structure with a support bar or a honeycomb structure inside, and a vertical eel wing structure on the inner or outer wall. It has the following disadvantages: ①The production process is complicated, The production needs to be pressed by abrasive tools. First, heat the plastic, extrude it in the abrasive tool, and after it is qualitative in cold water, it can be cut into fillers of specified size.

② The total surface area per unit reactor volume is small, the volume of a single filler is large, and the specific surface area is large, but the void ratio between the fillers after filling is large, and the volume utilization rate of the reactor with a fixed space relative to the single-hole filler is low, the bulk density is small, and the total surface area is reduced.

③ Lack of anaerobic bacteria living environment, the filler is divided into multiple pore structures, and the air bubbles are continuously replenished and attached to the honeycomb cavity. Under low aeration conditions, the suspension state can be maintained, the fluidization degree is good, and the membrane is renewed quickly. It is difficult to achieve a facultative anaerobic environment in the filler, resulting in poor nitrogen and phosphorus removal effects

At present, the devices with better water treatment effects have some disadvantages: ① the aeration pan is easy to block and difficult to maintain; ② the operation is complicated and difficult to maintain; The aeration regulating valve is damaged, and the aeration volume is insufficient due to the large pressure drop of the aeration pipe

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