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Energy-saving efficient two-phase anaerobic-aerobic coupling treatment process and system for kitchen wastes

A food waste and treatment system technology, applied in the direction of biomass post-treatment, biomass pre-treatment, chemical industry, etc., can solve the problem of COD effluent not up to standard, uneven distribution of internal circulation velocity field, acid-producing phase sludge loss, etc. problems, to achieve the effect of prolonging the hydraulic retention time, preventing scum and crusting, 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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  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of this, the present invention aims to propose an energy-saving and efficient two-phase anaerobic-aerobic coupling treatment process and system for food waste, to solve the shortcomings of the existing treatment process for food waste, and to solve the internal circulation of the current two-phase anaerobic process. Disadvantages such as uneven distribution of velocity field, serious encrustation, loss of acid-producing sludge, substandard COD effluent, etc., and then provide a method that can simultaneously reduce energy consumption, break shells, high-efficiency internal circulation, maintain sludge concentration in the digester and Two-phase anaerobic-aerobic coupling treatment process and system for food waste that can meet higher emission standards

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  • Energy-saving efficient two-phase anaerobic-aerobic coupling treatment process and system for kitchen wastes

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Effect test

Embodiment 1

[0054] An energy-saving and efficient two-phase anaerobic-aerobic coupling treatment process for food waste, comprising the following steps:

[0055] S1: Sieve the food waste into food waste organic matter and food waste inorganic matter, and dilute the food waste organic matter and grind it into a slurry with a particle size below 3mm;

[0056] S2: fully mixing and stirring the slurry obtained in step S1 and the sludge previously added to the acid-producing digester in the acid-producing digester to obtain mixed fermentation broth, primary crude biogas and primary biogas slurry and residue;

[0057] S3: introducing the mixed fermented liquid obtained in step S2 into the methanogenic digester to carry out the fermentation process of methanogenic digester to obtain the sludge produced in the middle part of the methanogenic digester, the effluent produced in the upper part, the secondary crude biogas and the secondary biogas slurry and residue;

[0058] S4: Precipitate and conce...

Embodiment 2

[0063] The energy-saving and high-efficiency two-phase anaerobic-aerobic coupling treatment system for kitchen waste according to the present invention mainly includes a pretreatment unit, an anaerobic treatment unit, an aerobic treatment unit, a biogas residue treatment unit, and a biogas purification and purification unit.

[0064] (1) Preprocessing unit

[0065] The pretreatment unit is equipped with a storage box, food waste grinding and separation equipment, and a discharge bin.

[0066] The storage box is used to hold the raw materials of food waste, and is provided with a discharge port connected with the food waste grinding and separation equipment. The grinding and separation equipment is used to separate the organic matter and the inorganic matter in the food waste output from the storage bin, and grind the organic matter into a slurry with a particle size below 3mm. The discharge bin is used to hold the food waste slurry output from the grinding and separation equi...

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Abstract

The invention provides an energy-saving efficient two-phase anaerobic-aerobic coupling treatment process and system for kitchen wastes. The energy-saving efficient two-phase anaerobic-aerobic couplingtreatment system comprises a pretreatment unit, an anaerobic treatment unit, an aerobic treatment unit, a biogas residue treatment unit and a biogas purifying unit. The treatment process and system disclosed by the invention have the advantages that a multistage hydraulic circulating system is arranged in an acid production digester and an alkane producing digester, so that the hydraulic retention time of a material is prolonged and uniform mixing of high solid wastes and microorganisms at low energy consumption can be ensured; an arranged sludge refluxing structure has multiple functions ofsupplementing activated sludge lost by an acidogenic phase and keeping stable sludge concentration of the acidogenic phase; the sludge concentration in the digester can be flexibly controlled according to organic load change condition of incoming water so as to ensure metabolic stability of microorganisms.

Description

technical field [0001] The invention belongs to the field of kitchen waste treatment technology, and in particular relates to an energy-saving and high-efficiency two-phase anaerobic-aerobic coupling treatment process and system for kitchen waste. Background technique [0002] With the improvement of the living standards of Chinese residents, the development of the catering industry has gradually expanded, followed by a continuous increase in the output of kitchen waste. Efficient treatment of kitchen waste has gradually become one of the problems to be solved urgently. At present, the main disposal methods of food waste include incineration, sanitary landfill, ecological feed, anaerobic digestion, aerobic composting and vermicomposting, etc., which usually have the defects of low resource utilization efficiency and unsatisfactory economic benefits. , anaerobic biological treatment technology is considered to be the most suitable solution for food waste treatment because of...

Claims

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Application Information

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IPC IPC(8): C12M1/33C12M1/107C12P5/02
CPCC12M21/04C12M23/58C12M29/02C12M43/00C12M45/02C12M47/18C12P5/023Y02E50/30Y02P20/10
Inventor 李慧婷胡春萍沈旺杨蛟云熊欢欢
Owner 宜升(天津)环境技术有限公司
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