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An embedded bioelectric synthesis system and method

A bioelectricity and embedded technology, applied in biochemical equipment and methods, bioreactor/fermenter combination, biomass post-processing, etc., can solve the problems of high energy consumption and difficult structure expansion

Active Publication Date: 2015-10-28
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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Problems solved by technology

[0004] In order to solve the problem that the existing waste and wastewater treatment process consumes a lot of energy, and the existing bioelectrochemical system is difficult to scale up due to structure and material limitations, the present invention provides a bioelectrosynthesis system and its method, through which The system can couple the anaerobic oxidation of waste and wastewater with the biosynthesis of organic chemicals such as methane, organic acids and alcohols

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  • An embedded bioelectric synthesis system and method

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Embodiment 1

[0054] Example 1: Construction of an embedded bioelectric synthesis system

[0055] The embedded bioelectric synthesis system is mainly composed of a reactor (1) for anaerobic oxidation of waste and wastewater, a bioelectric synthesis reactor (2), and a culture solution circulation control system. Wherein the bioelectric synthesis reactor (2) is embedded in the anaerobic oxidation reactor (1). The wastewater anaerobic oxidation reactor (1) adopts the traditional biological treatment structure or directly utilizes the existing wastewater treatment pool, and is sealed after matching transformation with the embedded bioelectric synthesis reactor, and is used for anaerobic oxidation of waste and wastewater. The bioelectric synthesis reactor (2) consists of a conductive stainless steel tube as the conductor wall (cathode) (3), and the outside of the wall includes a diaphragm (4), an anode current collecting net (5), and an anode (6). Carbon felt construction, the diaphragm between...

Embodiment 2

[0056] Embodiment 2: Embedded bioelectric synthesis system synthesizes organic acid

[0057] (1) System construction

[0058] The bioelectric synthesis system constructed in this example is shown in the attached figure 1 As shown, it mainly includes a wastewater anaerobic oxidation reactor (1) made of PVC plastic, a bioelectric synthesis reactor (2) made of stainless steel pipes, and a culture solution circulation control system connected by a peristaltic pump. Among them, the wastewater anaerobic oxidation reactor is cylindrical, with a height of 230mm, an outer diameter of 110mm, a wall thickness of 4mm, and a total volume of 1800mL (effective volume of 1000mL). The bioelectric synthesis reactor made of stainless steel tube is 200mm in height, 50mm in outer diameter, 1mm in wall thickness, with a total volume of 360ml and an effective volume of 200mL. The bioelectric synthesis reactor is sealed with a rubber plug, and an inlet and outlet pipeline is set. The outer side of ...

Embodiment 3

[0069] Example 3: Simultaneous synthesis of methane and acetic acid under high COD load of the embedded bioelectric synthesis system

[0070] For the bioelectric synthesis system described in Example 2, with the prolongation of the operation time, the COD degradation load in the anaerobic oxidation reactor increases significantly, and a large amount of methane is produced at the same time. Under high COD loading conditions, bioelectrosynthesis experiments were carried out. The influent COD concentration increased to about 10000mg / L, while other conditions and operating parameters remained unchanged. The results of detecting COD degradation and bioelectric synthesis during one batch of operation are as follows: After 6 days of operation, the COD of the influent water in the anaerobic oxidation reactor dropped from 9900mg / L to 40mg / L. During the operation, the collected anaerobic oxidation The generated gas is about 2500mL, the methane concentration in the gas phase product is ...

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Abstract

The invention relates to an embedded bioelectricity synthesis system, which mainly comprises an anaerobic oxidation reactor, a bioelectric synthesis reactor, a culture solution circulation control system, a power supply and an external circuit; the bioelectric synthesis reactor is composed, from the inside to the outside, of a conductive reactor wall, a diaphragm and an anode, and the conductive reactor wall is also a cathode of the reactor; and the culture solution circulation control system is used for controlling and adjusting pH, temperature, CO2 concentration and the like of the culture solution. Through the system disclosed by the invention, the anaerobic oxidation and biosynthetic reduction of the waste and waster water are coupled by applying electrical potential, after waste inside the anaerobic oxidation reactor and the electron generated by anaerobic oxidation of wastewater are transferred to the conductive reactor wall as the cathode, electron streams penetrate through the reactor wall and are transferred to the microbial flora in the bioelectric synthesis reactor and CO2 is reduced and synthesized into organic chemicals after electrons are obtained by the microbial flora,.

Description

technical field [0001] The invention belongs to the technical field of waste and waste water resource utilization and biosynthesis, and specifically relates to an embedded bioelectric synthesis device and a method for biosynthesizing organic chemicals by utilizing the energy generated by waste and waste water anaerobic oxidation . technical background [0002] In the process of industrial and agricultural production and people's life, a large amount of waste and wastewater containing various organic pollutants and inorganic reducing pollutants such as ammonia nitrogen will be discharged. These wastes and wastewater contain a large amount of reducing energy in the form of reduced substances. The reducing energy in these wastes and wastewater, only part of the biomass waste and high-concentration organic wastewater is recovered in the form of methane and other biomass energy through fermentation. The vast majority of waste and wastewater are mainly through terminal treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/38C12M1/36C12M1/107C12P5/02C12P7/54C25B3/00C25B9/00C02F3/28
CPCY02W10/37Y02P20/582
Inventor 李大平何晓红
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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