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Circulating and mixing device in two-phase anaerobic digester for efficiently promoting acid production

An anaerobic digestion and mixing device technology, which is applied in anaerobic digestion treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of insufficient mixing power of the bottom reflux of the methane-producing phase, insufficient hydraulic stirring power of the acid-producing phase, Uneven distribution of velocity field and other problems, to achieve the effect of prolonging hydraulic retention time, improving acid production performance, and improving operating efficiency

Pending Publication Date: 2018-06-29
宜升(天津)环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the invention aims to propose a two-phase anaerobic digester internal circulation mixing device that can efficiently promote acid production, which solves the problem of insufficient hydraulic agitation power and uneven velocity field distribution of the acid production phase in the existing two-phase anaerobic technology , severe crusting, low fermentation acid production performance, and insufficient hybrid power for bottom reflux of the methanogen phase

Method used

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  • Circulating and mixing device in two-phase anaerobic digester for efficiently promoting acid production
  • Circulating and mixing device in two-phase anaerobic digester for efficiently promoting acid production

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Embodiment 1

[0049] The creation of the present invention has been applied in the resource utilization and harmless treatment project of kitchen waste in Hefei City. The treatment project is 150m 3 The food waste is processed into biogas energy.

[0050] The acid-producing digester 1 of the biogas project adopts a fully mixed anaerobic reactor (CSTR), and the digester volume is 2500m 3 , with a diameter of 18m and a height of 10.5m; our company adopted a secondary acid-producing feed system 11 and a secondary acid-producing circulation system 12 in the acid-producing digester 1 of the food waste treatment project. A primary acid-generating feed valve 114 is set at a height of 1 m in the digester, and a secondary acid-generating feed valve 115 is set at a height of 9.9 m. Due to the high solid content of kitchen waste, the feeding method of the top feed pipe is adopted, and the bottom feed pipe is reserved for the long-term treatment of landfill leachate. Considering the relatively large di...

Embodiment 2

[0055] The creation of the present invention has also been applied in the resource utilization and harmless treatment project of kitchen waste in Taiyuan City. 3 The food waste is processed into biogas energy.

[0056] The acid-producing digester 1 of the biogas project uses two fully mixed anaerobic reactors (CSTR), with a digester volume of 1000m 3 , with a diameter of 9m and a height of 16m; considering the high solid content and high specific gravity of food waste, a primary acid production feed system 11 is used for top feeding, and a primary acid production feed system is set at a height of 15m in the digester. Feed valve 114. Combined with the small diameter-to-height ratio of the acid-generating digester 1, our company adopted a single-side three-stage acid-generating cycle system 12 in the acid-generating digester 1 of the food waste treatment project (see figure 2 ), an acid production circulation water intake valve 126 is set at a height of 9 meters, and a primar...

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Abstract

The invention provides a circulating and mixing device in a two-phase anaerobic digester for efficiently promoting acid production. The circulating and mixing device comprises a generated acid digester and a generated methane digester, which are connected with each other through a circulating water pipeline, wherein a generated acid feeding system and at least one group of generated acid circulating systems are arranged on the generated acid digester; the generated acid feeding system comprises a generated acid feeding pump and at least one-stage generated acid feeding pipeline, wherein the generated acid feeding pump is connected with the generated acid feeding pipeline; and the generated acid feeding pipeline enters the generated acid digester. The multi-stage feeding system of the circulating and mixing device in the two-phase anaerobic digester for efficiently promoting acid production can increase contact time between acid-generating phase microorganisms and materials, improves acid-generating performance, and improves material degradation efficiency.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a two-phase anaerobic digester internal circulation mixing device for efficiently promoting acid production. Background technique [0002] At present, compared with the single-phase anaerobic digestion technology, the two-phase anaerobic reactor has more obvious advantages in the treatment of high organic waste and wastewater because it fully considers the different physiological and metabolic characteristics of acidogenic bacteria and methanogenic bacteria. Among them, the treatment efficiency of the acid production phase mainly depends on the uniformity of mixing between the material and the sludge. Therefore, adopting an appropriate stirring method to maintain the sufficient interaction between the microorganisms and the fermented product in the reactor is the key to obtaining a good treatment and fermentation capacity. Especially when dealing with high-solid waste,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/286C02F3/2866
Inventor 胡春萍李慧婷沈旺杨蛟云熊欢欢
Owner 宜升(天津)环境技术有限公司
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