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Device and method for strengthening granulation process of aerobic sludge

An aerobic sludge and granulation technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc. The effect of high biomass, good sludge settling performance and simple operation

Active Publication Date: 2019-02-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the common problems of long granulation cycle and long-term operation instability in the prior art, the present invention provides a device and method for strengthening the aerobic sludge granulation process

Method used

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  • Device and method for strengthening granulation process of aerobic sludge
  • Device and method for strengthening granulation process of aerobic sludge
  • Device and method for strengthening granulation process of aerobic sludge

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specific Embodiment approach 1

[0027] Specific implementation mode one: as figure 1 As shown, the device for strengthening the aerobic sludge granulation process provided by this embodiment includes a water inlet unit, a reactor 3, an aeration unit, a water outlet unit and a control unit 9, wherein:

[0028] The water inlet unit includes a water inlet tank 1 and a water inlet peristaltic pump 2 for controlling the water inlet flow and time, and the outlet pipe of the water inlet peristaltic pump 2 is connected with the water inlet at the bottom of the reactor 3;

[0029] The main body of the reactor 3 is a cylindrical sequential batch reactor, an inert titanium cathode 12 is arranged on the inner side of the cylinder wall, an active iron anode 11 is arranged in the center of the cylinder, and two electrodes of the inert titanium cathode 12 and the active iron anode 11 are arranged. The lead wire at the end of the terminal is connected with the DC stabilized voltage power supply 10;

[0030] The aeration un...

specific Embodiment approach 2

[0038] Embodiment 2: This embodiment provides a method for strengthening the aerobic sludge granulation process using the device described in Embodiment 1. The method includes the following steps:

[0039] Step 1. Influent water source configuration process: manually configure the influent water source to simulate urban domestic sewage, in which: COD is 300-800mg / L, NH4 + -N is 40~80mg / L, TP is 8~1510mg / L;

[0040] Step 2. Inoculation process: inoculate the domesticated flocculent sludge in the reactor so that the initial MLSS in the reactor is 3-6 g / L;

[0041] Step 3. Aerobic sludge granulation process: The reactor is operated by SBR process, and the operation period is 4-6 hours, which is divided into four stages: water inflow, aeration, sedimentation and drainage. Among them: the sedimentation time is 5-20 minutes, and the aeration The gas time is 210-225 minutes; constant voltage direct current is continuously applied to the aerobic granular sludge system during the oper...

specific Embodiment approach 3

[0047] Specific implementation mode three: This implementation mode provides a method for strengthening the aerobic sludge granulation process, and the specific implementation steps of the method are as follows:

[0048] (1) Preparation of water source

[0049] The influent water source is simulated urban domestic sewage artificially configured in the laboratory, in which COD is 600mg / L, NH4 + -N is 60 mg / L, TP is 10 mg / L, and pH is 6.5. In addition, 0.5mM calcium and magnesium ions and 1mL / L trace element solution were added to the influent. Among them, 1L trace element solution contains: FeCl 3 ·6H 2 O, 1.5g; H 3 BO 3 , 0.15g; CuSO 4 ·5H 2 O, 0.03g; KI, 0.18g; MnCl 2 4H 2 O, 0.12g; Na 2 MoO 4 2H 2 O, 0.06g; ZnSO 4 ·7H 2 O, 0.12g; CoCl 2 ·6H 2 O, 0.15g; EDTA, 0.04g.

[0050] (2) Inoculate flocculent sludge

[0051] A certain amount of domesticated flocculent sludge is inoculated in the device of the present invention, so that the initial MLSS in the reactor ...

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Abstract

The invention discloses a device and method for strengthening a granulation process of aerobic sludge. The device comprises a water inlet unit, a reactor, an aeration unit and a water outlet unit, wherein the water inlet unit comprises a water inlet tank and a water inlet peristaltic pump; a water outlet pipe of the water inlet peristaltic pump is connected with a water inlet at the bottom of thereactor; an inert titanium cathode is arranged on an inner wall of the reactor; an active iron anode is arranged at the center of the reactor; tail ends of the inert titanium cathode and the active iron anode are connected with a direct-current voltage-stabilization power supply through lead wires; the aeration unit comprises an air pump, a rotor flow meter and a sand filtering aeration head whichare connected in sequence; the sand filtering aeration head is arranged at the bottom of the reactor; the water outlet unit comprises a water outlet tank and a water outlet solenoid valve connected with the water outlet tank; the water outlet solenoid valve is connected with a water outlet formed in the middle of the reactor through a water outlet pipe. According to the device disclosed by the invention, rapid granulation of the aerobic sludge and long-period stable operation of an aerobic granular sludge system can be realized at the same time.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to a device and a method for strengthening the granulation process of aerobic sludge. Background technique [0002] Aerobic granular sludge is a dense biological aggregate formed by mutual adhesion and self-flocculation of microorganisms under the drive of various selective pressures. The aerobic granular sludge technology developed based on this has obvious advantages , such as: dealing with a wide variety of pollutants, strong impact resistance, good sludge settling performance and less land occupation of treatment facilities, etc. Since the discovery of aerobic granular sludge in the 1990s, domestic and foreign scholars have carried out a lot of research on its physical and chemical characteristics, microbial communities, mass transfer models, and formation mechanisms. As a technical brand, the process has established more than 30 aerobic granular sludge s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/00
CPCC02F3/005C02F3/1263C02F2201/48Y02W10/10
Inventor 时文歆郭媛李伟光
Owner HARBIN INST OF TECH
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