Electrochemical coupling upflow anaerobic bioreactor and application method

Abstract

The invention relates to an electrochemical coupling upflow anaerobic bioreactor and an application method. The electrochemical coupling upflow anaerobic bioreactor comprises an upflow anaerobic bioreactor cylinder, a biological electrode system and a constant-temperature water-bath system, wherein the biological electrode system is used for supplying electron donors to a microorganism system in the upflow anaerobic bioreactor cylinder, and the constant-temperature water-bath system is used for providing constant-temperature water bath to the upflow anaerobic bioreactor cylinder; a sludge area of the upflow anaerobic bioreactor is provided with a pair of biological electrodes with adjustable electrode area and adjustable inter-electrode distance, the biological electrodes are connected with a direct-current power supply outside a bioreactor main body through a metal conducting wire, and electrode voltage, loop current and cathode potential are monitored and controlled through the direct-current power supply and an electric gauge, which are connected with the outside of the bioreactor main body. By adopting the electrochemical coupling uupflow anaerobic bioreactor, the granulation of the anaerobic sludge can be accelerated, the bioreactor can be rapidly started, and chloronitrobenzene can be stably degraded; moreover, the electrochemical coupling upflow anaerobic bioreactor is reliable in structure, easy to machine, small in energy consumption and stable in running.

Description

technical field [0001] The invention relates to a novel electrochemical coupling anaerobic biological reaction device and method, belonging to the technical field of water treatment. Background technique [0002] In the field of wastewater biological treatment, anaerobic biological treatment technology has a wide range of applications, low operating energy consumption, high volume load, low sludge production, and biogas production capacity. It is one of the most widely used processes in wastewater treatment processes. Anaerobic biological treatment process from the initial septic tank to the subsequent development of anaerobic biological filter, anaerobic contact method, segmented anaerobic treatment method, sludge expanded bed and anaerobic fluidized bed, anaerobic biological turntable, etc., Rapid development and wide application. Among them, the upflow anaerobic sludge bed reactor (UASB) has become the mainstream process device for anaerobic biological treatment because ...

AI Technical Summary

Problems solved by technology

However, under certain impact load conditions and the influence of toxic substances, anaerobic reactors are prone to acidification phenomena such as increased effluent COD, decreased pH, and reactor sludge floating or washing out, and this phenomenon has long been a UASB phenomenon. One of the limiting factors for popularization and application of a mainstream process

[0003] Chloronitrobenzene is a typical chlorine-containing and nitro-aromatic compound. It has three effects and genotoxicity. It belongs to the first class of priority pollutants stipulated in my country. Stable in nature and difficult to biodegrade, the conventional anaerobic biological treatment process cannot degrade it or the degradation rate is very slow due to the lack of available electron donors

At present, domestic and foreign remediation technologies for such refractory pollutants usually add glycolytic organic matter or substances that can slowly release hydrogen (such as ZVI, etc.) as electron donors to accelerate the reductive degradation of chlorinated compounds, but the above Method Electron donors are unnecessarily lost due to diffusion or abiotic utilization, and the utilization efficiency is not high

Electrochemical coupled anaerobic microbial process is a new anaerobic biological treatment technology, which has been gradually applied to the treatment of nitrate, perchlorate, metal Cr and azo dyes in wastewater in recent years. Single, limited electrode reinforcement

At the same time, the electrode coupling process electrode installation method is limited, lacking a stable installation method with adjustable electrode area and electrode spacing

[0004] In addition, the coupling system lacks an effective operation monitoring method, and the mechanism of action of bioelectrode-enhanced anaerobic bioreactors on chloronitrobenzene needs to be further clarified

Images