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Wastewater treatment system and method employing dual-chamber MFC (microbial fuel cell) combined with A/O process

A wastewater treatment system and wastewater treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, electrochemical-biological combination treatment, etc. Standards, low efficiency of wastewater treatment, high application cost and other issues, to reduce the loss of biomass, low battery cost, and achieve the effect of removal

Inactive Publication Date: 2015-03-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current technology of using microbial fuel cells to treat sewage is immature and still in the stage of experimental research. There are no recognized standards for the configuration of electrode chambers, electrode materials, and treatment processes.
Microbial fuel cells still have problems such as low treatment efficiency, low current density, and high application cost in wastewater treatment.

Method used

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  • Wastewater treatment system and method employing dual-chamber MFC (microbial fuel cell) combined with A/O process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Treatment of simulated wastewater by a dual-chamber microbial fuel cell (MFC) wastewater treatment system combined with the A / O process

[0021] The dual-chamber microbial fuel cell (MFC) wastewater treatment system combined with the A / O process is used to treat simulated wastewater. The method for treating simulated wastewater is as follows: microbial fuel cells such as figure 1 As shown, the anode chamber 1 and the cathode chamber 2 are squares with a side length of 12 cm, and the cathode 3 and the main anode 4 are square carbon felt sheets with a length and width of 10 cm and a thickness of 1 cm. The effective volume of the cathode chamber 2 is 1.5 liters; the auxiliary anode 5 fills two-thirds of the volume of the anode chamber 1, and the effective volume of the anode 1 is 0.5 L. The simulated wastewater is prepared with tap water, in which COD is about 400mg / L, ammonia nitrogen is about 40mg / L, phosphorus is about 6mg / L, and NaCl 0.4g / L is added to the s...

Embodiment 2

[0022] Example 2: Treatment of domestic sewage by a dual-chamber microbial fuel cell (MFC) wastewater treatment system combined with the A / O process

[0023] The dual-chamber microbial fuel cell (MFC) wastewater treatment system combined with the A / O process is used to treat domestic sewage as follows: the same microbial fuel cell device as in Example 1 is used, and the raw water is untreated domestic sewage collected from a sewage treatment plant. The raw water COD is 323mg / L, ammonia nitrogen is 34.2mg / L, and phosphorus is 3.7mg / L. Adjust the peristaltic pump to control the total hydraulic retention time to 8 hours, and the internal circulation ratio is 3:1. The experimental results show that the COD of the effluent is 38mg / L, the concentration of ammonia nitrogen is 6.76mg / L, and the concentration of phosphorus is 0.97mg / L. The removal rates are 88%, 80%, and 74% respectively, which meet the national urban domestic sewage treatment discharge standards. The open circuit volt...

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Abstract

The invention discloses a wastewater treatment system and method employing a dual-chamber MFC (microbial fuel cell) combined with an A / O process. An anode chamber is separated from a cathode chamber through a proton exchange membrane; a main anode and an auxiliary anode are arranged in the anode chamber, and are connected with each other through a lead; an aerating apparatus is arranged at the bottom of the cathode chamber; a cathode is arranged in the cathode chamber, and is connected with the main anode through a rheostatic box; a water outlet of the anode chamber is connected with a water inlet of the cathode chamber through a second peristaltic pump, a second settling pond and a third peristaltic pump; the first settling pond is connected with the water inlet of the anode chamber through a first peristaltic pump; a water outlet of the cathode chamber is connected with a water inlet of the anode chamber through a fourth peristaltic pump, a third settling pond and a fifth peristaltic pump; and the water outlet of the cathode chamber is connected with a fourth settling pond. According to the wastewater treatment system and method, two electrode chambers of the dual-chamber microbial fuel cell are effectively utilized; synchronous denitrification and phosphorus and carbon removal are achieved; lasting stable current is generated; unification of sewage treatment and energy recovery is achieved; and the wastewater treatment process employing the microbial fuel cell is further improved.

Description

technical field [0001] The invention relates to a dual-chamber MFC (microbial fuel cell) wastewater treatment system combined with an A / O process and a method thereof. Background technique [0002] A microbial fuel cell (MFC) is a device that uses microorganisms as a catalyst to convert chemical energy in organic matter into electrical energy. Microbial fuel cells use microorganisms attached to the anode to degrade organic matter to generate electrons and protons, and the generated electrons are transferred to the anode and then reach the cathode through an external circuit, thereby generating an external current. The generated protons reach the cathode through the separator material, thereby completing the transfer of charge inside the battery. Common microbial batteries are divided into single-chamber microbial fuel cells and dual-chamber microbial fuel cells. The difference is mainly reflected in the design of the cathode. The single-chamber microbial fuel cell uses an ...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34H01M8/16
CPCC02F3/005C02F3/302C02F3/308C02F3/34H01M8/16Y02E60/50
Inventor 梁志伟王存豹何李宜
Owner ZHEJIANG UNIV
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