Integrated dry-wet anaerobic digestion device

Abstract

The invention discloses an integrated dry-wet anaerobic digestion device. The integrated dry-wet anaerobic digestion device comprises a digestion tank, and a feed pipe and a bottom sullage discharge pipe are arranged at the bottom of the digestion tank. The integrated dry-wet anaerobic digestion device is characterized in that a dry anaerobic region, a three-phase separation region and a wet anaerobic region are arranged in the digestion tank from bottom to top; a stirrer is arranged in the dry anaerobic region and carries out material stirring, large-size organic materials are decomposed into small-size materials in the dry anaerobic region, and a great number of biogas bubbles are generated; the large-size solid materials return to the dry anaerobic region through the three-phase separation region, and the small-size materials and liquid phase enter the wet anaerobic region; a biogas aerator pipe is arranged in the wet anaerobic region, an upper discharge pipe is arranged on the upper portion of the wet anaerobic region, water is output through the upper discharge pipe in an overflow mode, the biogas generated under the anaerobic condition enters a top air chamber in the upper portion of the wet anaerobic region, and a top biogas pipe is arranged at the top of the top air chamber. The integrated dry-wet anaerobic digestion device is high in organic matter degradation rate, high in biogas content, low in biogas residue yield, high in outlet water quality, capable of automatically and continuously producing biogas with high-concentration organic solid waste and particularly suitable for anaerobic digestion production of the organic materials which are low in water content and high in impurity content.

Description

technical field [0001] The invention belongs to the technical field of organic material treatment, and relates to an anaerobic digestion device for organic materials, in particular to an integrated dry-wet anaerobic digestion device. Background technique [0002] The organic waste of the present invention includes catering waste, kitchen waste, municipal sludge, poultry manure, vegetable market waste, supermarket expired food, food processing waste, distiller's grains, agricultural organic solid waste and other high-concentration organic solid waste. The classification mechanism is not yet perfect in my country, and traditional organic waste is usually disposed of by landfill, incineration or aerobic composting. Due to the constraints of available land, landfills are facing more and more difficult site selection problems in my country; although incineration can achieve better reduction results, organic waste with a high moisture content often greatly increases the cost of inc...

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Problems solved by technology

[0006] How to give full play to the respective advantages of wet and dry anaerobic, the traditional process adopts a split design, that is, after the dry anaerobic digestion is dehydrated, the liquid phase enters the wet anaerobic digestion, the process is complicated, the floor area is large, and It is necessary to set up an intermediate buffer and dehydration system. Since the dry anaerobic adopts a fully mixed digestion method, the output contains a large amount of undegraded organic matter. After passing through the dehydration system, only the liquid phase enters the wet anaerobic digestion, and the dehydrated solid phase remains Contains more undegraded organic matter

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