A device for automatic titration of anaerobic fermentation buffer capacity

Abstract

The invention discloses an automatic titration device for anaerobic fermentation buffer ability, which relates to the technical field of biological fermentation and is used for solving the problem of failure in simultaneous accurate measurement of mass concentration of total inorganic carbon (TIC) and volatile fatty acids (VFA) in anaerobic fermentation broth in the prior art. The automatic titration device comprises a power module, a man-machine exchange module, a data acquisition module, a driving transmission module and a liquid sucking / dropping module. The automatic titration device adopts the combined and integrated structure, application software provides a user operation panel, the panel of corresponding actual instrument realizes control and signal expression function of the instrument, the automatic titration device can simultaneously realize accurate measurement of mass concentration of TIC and VFA in the anaerobic fermentation broth by once titration, also can realize the functions of automatic calibration of a pH meter, automatic titration and liquid supplement, real-time generation of titration curve, data processing, display and storage, is suitable for pH, TIC and VFA mass concentration determination of anaerobic fermentation broth, and also can be used for titration of other samples.

Description

technical field [0001] The invention belongs to the technical field of biological fermentation, in particular to a device for automatically titrating the buffer capacity of anaerobic fermentation. Background technique [0002] The treatment of organic waste by biogas fermentation technology can achieve the dual effects of environmental protection and energy recovery, thereby realizing the recycling and harmlessness of waste. Therefore, it is widely used in wastewater treatment, livestock and poultry manure treatment, and agricultural solid waste treatment. According to relevant statistics, as of June 2011, Beijing alone has built 259 large and medium-sized biogas projects with a total investment of 430 million yuan, including 120 large and medium-sized biogas centralized gas supply projects with an annual biogas production capacity of 16.68 million cubic meters, 132 gas supply villages, benefiting 40,000 farmers; 139 large-scale farm manure and biogas comprehensive utilizati...

AI Technical Summary

Problems solved by technology

Most of these methods can only detect volatile organic acids and bicarbonate alkalinity separately, and require high equipment costs, operator knowledge and operating procedures, which directly limit the popularization and application of actual biogas projects.

[0005] For large and medium-sized biogas projects with huge investment and high expected economic benefits, a stable fermentation process is crucial. However, conventional indicators such as pH value and methane yield cannot directly and accurately reflect the buffering capacity of the system, and have a great impact on the stability of the system. Judgment has a hysteresis, so it is necessary to study and select indicators that can directly and reliably judge the buffer capacity of the fermentation process and provide timely feedback and early warning of biogas project stability--volatile fatty acids and bicarbonate alkalinity. It is necessary to study a set that can accurately measure anaerobic fermentation The concentration of volatile fatty acids in the liquid and the alkalinity of bicarbonate are used to provide technical support for the stable operation and monitoring and early warning of biogas projects

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