A two-phase anaerobic treatment device and process based on magnetite and activated carbon reinforcement

Abstract

The invention discloses a two-phase anaerobic treatment device based on magnetite and activated carbon reinforcement. The device is provided with an acidizing phase barrel body, a methane production phase barrel body and a stirring machine. Technological steps of the device comprises slowly adding FeCl3 and FeCl2 mixture into HCl solution, adjusting pH of mixed solution to be 6.5 to 7.5 through NaOH solution and obtaining black suspension precipitation namely magnetite; adding the magnetite into a suspension sludge area in an acidizing phase device and sealing the device; adding coal-quality columnar activated carbon into an activated carbon filling layer in a methane production phase device and sealing the device; respectively controlling hydraulic retention time of the acidizing phase device and the methane production phase device and pH and temperature in the devices. The two-phase anaerobic treatment device disclosed by the invention has the following effects of reinforcing acidizing phase complex organism decomposition, improving hydrolytic acidizing efficiency, quickening methane production phase organic aid and alcohol matter metabolism, maintaining acidity balance in the methane production phase and having an obvious effect of improving methane yield. The two-phase anaerobic treatment device has small invest cost, is simple to operate and can be applied to upgrading and reconstruction of an existing two-phase anaerobic technology to resist impact of high organic load wastewater.

Description

technical field [0001] The invention relates to an anaerobic biological treatment process for industrial waste water. Background technique [0002] Medium and high-concentration organic wastewater, such as the excessive discharge of chemical, pharmaceutical, textile printing and dyeing industries, is one of the important reasons for water pollution. The anaerobic methanation technology represented by the above-mentioned flowing anaerobic sludge bed (UASB) has the characteristics of high load, low energy consumption, biogas production (main components are methane and carbon dioxide), and is theoretically suitable for treating medium and high concentration organic wastewater. One of the preferred methods for . However, the process of anaerobic acid production and methanogenesis is quite different in terms of microbial ecology and metabolic rate, which may easily lead to acid imbalance and stop of methanation. [0003] It is generally believed that the two-phase anaerobic pro...

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Problems solved by technology

[0005] In order to solve the problems of low hydrolysis and acidification efficiency of the acidification phase in the two-phase anaerobic process, and the slow mutual trophic metabolism of methanogens, which leads to the limitation of the application of the two-phase anaerobic process in the actual industrial wastewater treatment process, the present invention proposes the following technical solutions: A two-phase anaerobic treatment device based on magnetite and activated carbon reinforcement, characterized in that: the acidification phase cylinder body with the acidification phase insulation layer is the acidification phase suspended sludge area, and the main shaft of the mixer passes through the acidification phase cylinder body The upper cover extends into the suspended sludge area of ​​the acidification phase

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