Fermentation tank and dry anaerobic fermentation system and method including same for co-processing municipal solid waste and municipal sludge

An anaerobic fermentation and fermentation tank technology, applied in the field of fermentation engineering, can solve the problems of low gas production potential and gas production quality of the system, unreasonable nutritional structure of digestive flora, low volume load of the reactor, etc., so as to save construction. cost, increased gas production potential, and the effect of appropriate material selection

Active Publication Date: 2020-01-10
营口同方能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The solid content of the material to be processed is generally lower than 15%, the volume load of the reactor is not high, and the volume of the reactor required to process the same material is relatively large, resulting in relatively high construction costs
[0007] 2. During the digestion process, the ratio of the number of different types of bacteria is not easy to adjust, the system is easy to acidify, and the operation stability is relatively poor
[0008] 3. The nutrient structure of the digestive flora is not reasonable, and the gas production potential and quality of the system are not high

Method used

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  • Fermentation tank and dry anaerobic fermentation system and method including same for co-processing municipal solid waste and municipal sludge
  • Fermentation tank and dry anaerobic fermentation system and method including same for co-processing municipal solid waste and municipal sludge
  • Fermentation tank and dry anaerobic fermentation system and method including same for co-processing municipal solid waste and municipal sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162]1. The first round of fermentation

[0163] 1. System establishment:

[0164] At the beginning of the establishment of the system, with the goal of cultivating the digestive flora, the initial reaction materials are uniformly mixed in the mixing and feeding system and then poured into the fermenter for fermentation (the filling factor is about 30%).

[0165] The initial reaction material contains fresh cow dung, municipal sludge and mature straw; its mass ratio is 35:55:10, and its moisture content is 50% to 60%;

[0166] Wherein, the preparation method of the stalk after described ripening is:

[0167] After the corn stalks or corn miscellaneous are crushed, they are mixed with the decomposing bacteria agent. The mass ratio of the decomposing bacterial agent to the corn stalk or corn is 0.002-0.003:1;

[0168] The microbial agent is composed of a comprehensive bacterial group of thermophilic and heat-resistant bacteria, fungi and actinomycetes that can strongly decom...

Embodiment 2

[0189] Consistent with Example 1, the only difference is that in the fermentation cycle stage, the mature straw is added when the VFA rises in the acidification stage.

[0190] The mass ratio of the mature straw to the fermented material in the fermenter is 1: (3-5).

[0191] Adding the mature straw at this time is equivalent to the role of fermentation additives, mainly to adjust the structure of the flora and stabilize the carbon-nitrogen ratio (C / N) of the system; the digestive system is greatly affected by the concentration of ammonia nitrogen, when ammonia nitrogen (NH 3 + NH 4 + ) when the concentration reaches 3000mg / l~4000mg / l, it will inhibit methanogens and acetogens, accumulate propionic acid, increase the acidity of the environment, and eventually cause the system to stagnate. The introduction of additives optimizes the quantity and quality of the leading bacteria in the system, greatly improving the tolerance and stability of the leading bacteria and bacterial ...

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Abstract

The invention relates to the field of fermentation engineering, and relates to a fermentation tank and a dry anaerobic fermentation system comprising the same and cooperatively processing municipal domestic waste and municipal sludge and a dry anaerobic fermentation method. The system comprises a material mixing injection system, an anaerobic fermentation system, a re-circulating system and a discharging and dehydrating system, wherein the municipal domestic waste, the municipal sludge, agricultural waste and other complex organic wastes are cooperatively subjected to anaerobic digestion treatment with high solid content, so that the treatment way of the municipal domestic waste is found, the waste is changed into wealth, and a new energy source is provided.

Description

technical field [0001] The invention relates to the field of fermentation engineering, in particular to a fermenter and a dry anaerobic fermentation system and method comprising the same for co-processing municipal solid waste and municipal sludge. Background technique [0002] With the rapid development of our country's social economy and the continuous improvement of the living standards of urban residents, the amount of municipal solid waste is increasing day by day, and waste disposal has become a major problem in the development of modern cities and towns. Judging from the current status of urban waste disposal, sanitary landfill and large-scale incineration are the main methods of disposal, leading to serious water pollution, biological pollution, and air pollution. In particular, waste incineration enterprises that do not meet the standards for dioxin emissions account for 10% of the total number of enterprises. For the most part, the situation is not optimistic. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04C05F15/00C05F17/00C12M1/16C12M1/107C12M1/04C12M1/02C12M1/00C12P5/02
CPCC02F11/04C05F3/00C05F17/00C05F17/90C12M21/04C12M21/16C12M23/34C12M23/36C12M23/58C12M29/06C12M29/18C12M29/24C12M41/12C12M41/22C12M45/02C12P5/023C05F7/00C05F9/00C05F11/00Y02E50/30Y02W30/40
Inventor 褚海东米卓张松立王世荣
Owner 营口同方能源技术有限公司
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