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Zeolite modified macromolecule suspension biological carrier based wastewater reinforcement and nitrification process

A biological carrier and polymer technology, applied in biological water/sewage treatment, aerobic process treatment, sustainable biological treatment, etc., can solve the lack of enrichment of nitrifying bacteria functional design, restriction of nitrification effect, hydrophilicity and electrophilicity In order to achieve the effect of accelerating the growth rate of microbial attachment, improving the electrophilicity and hydrophilicity, and increasing the abundance

Active Publication Date: 2019-08-06
DALIAN UNIV OF TECH
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Problems solved by technology

Traditional suspension carriers usually have inherent disadvantages such as poor hydrophilicity and electrophilicity, and lack of functional design for enriching nitrifying bacteria, which restricts the further improvement of nitrification effect

Method used

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  • Zeolite modified macromolecule suspension biological carrier based wastewater reinforcement and nitrification process

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Embodiment 1

[0018] 1) The reactor of this embodiment is a cylindrical device made of plexiglass, with an effective volume of 4L; 2) Control group: only 8-10g of zeolite powder (200 mesh) was added to the reactor for adsorption test; 3) Experimental group: The IFFAS reactor with zeolite-modified polymer suspended biological carrier, the dosage of the carrier is 30% of the effective volume of the reactor, and the sequential batch water feeding method is adopted. The concentration of the water in the reactor is 45mg / L, and the DO concentration is 2 -3mg / L. After each group of reactors operated for 6 hours, the effluent NH of the control group reactor 4 + -N concentration is 38.2mg / L, NH 4 + -N removal rate is 15%; the effluent NH of the experimental group reactor 4 + -N concentration is 0.9mg / L, NH 4 + -N removal rate was 98%.

Embodiment 2

[0020] 1) figure 1 It is a schematic diagram of the reaction device of this embodiment. Control group 1: activated sludge reactor, control group 2: IFFAS reactor with common carrier (the dosage of carrier is 30% of the effective volume of the reactor), experimental group: adding zeolite modified polymer suspended biological carrier The IFFAS reactor (carrier dosage is 30% of the effective volume of the reactor); 2) The sludge in the secondary sedimentation tank of the municipal sewage treatment plant is used to start the IFFAS reactor, and the sludge concentration in each reactor after inoculation is 2500mg / L; 3) The reactor adopts a continuous flow water inlet method, and the water flow rate is controlled to adjust the hydraulic retention time to 6 hours; an aeration plate is placed at the bottom of the reactor, and an external aeration device is connected to ensure the sludge and biological carrier. Fully fluidized and evenly distributed, and adjust the aeration rate throu...

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Abstract

The invention discloses zeolite modified macromolecule suspension biological carrier based wastewater reinforcement and nitrification process, and belongs to the technical field of sewage treatment. Through the improvement on the core part, a suspension biological carrier, of moving bed biofilm process and biofilm and activated sludge composite process, the suspension biological carrier can have functions of adsorbing ammonia nitrogen and enriching nitrobacteria by adding a functional material; and the zeolite modified macromolecule suspension biological carrier is put into a MBBR / IFFAS reactor according to a certain proportion, so that the enrichment effects of nitrosomonas & nitrobacter on the carrier can be improved, the abundance of functional flora in a reaction system can be enhanced, and therefore, the nitrification effects of the system can be reinforced, and effluent ammonia nitrogen can meet requirements for discharging.

Description

technical field [0001] The invention relates to a waste water enhanced nitrification process based on a zeolite-modified polymer suspended biological carrier, belonging to the technical field of sewage treatment. Background technique [0002] With the continuous development of my country's social economy, water nitrogen pollution and water eutrophication have become increasingly serious, and have become important factors that affect the water environment and restrict the sustainable development of the economy and society. Therefore, how to remove ammonia nitrogen in sewage efficiently and at low cost has become an urgent focus in the field of water treatment. According to the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), the level A standard of sewage treatment requires the discharge limit of ammonia nitrogen to be 5mg / L (8mg / L in winter), and the discharge limit of total nitrogen to be 15mg / L. L. However, some local standards (such as B...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F3/12C02F3/10C02F101/16
CPCC02F3/02C02F3/101C02F3/12C02F2101/16Y02W10/10
Inventor 全燮景傲霜刘涛陈硕
Owner DALIAN UNIV OF TECH
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