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Sewage sludge and kitchen waste treatment device and treatment method

A technology for kitchen waste and sewage sludge, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., to improve volume utilization efficiency and promote nutritional balance

Active Publication Date: 2015-03-04
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a treatment device and method for sewage sludge and kitchen waste, which are used to solve the problems caused by the separate treatment of existing sewage sludge and kitchen waste. The method of waste co-digestion increases the organic matter content of sewage sludge and reduces the acidity and salinity of food waste at the same time, so as to achieve the purpose of increasing methane production and organic matter degradation efficiency

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  • Sewage sludge and kitchen waste treatment device and treatment method
  • Sewage sludge and kitchen waste treatment device and treatment method

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Embodiment 1

[0047] Such as figure 1 As shown, a treatment device for sewage sludge and kitchen waste includes a homogeneous slurry treatment reactor 1, a sewage sludge pretreatment device 2 and a kitchen waste pretreatment device 3. The homogeneous slurry treatment reaction The device 1 is in communication with the sewage sludge pretreatment device 2, and the homogeneous slurry treatment reactor 1 is in communication with the food waste pretreatment device 3.

[0048] Further, in order to complete the two-phase anaerobic co-digestion treatment of sewage sludge and food waste, the treatment device for sewage sludge and food waste further includes an acid-producing phase reactor 4 and a methanogenic phase reactor 5. The homogeneous slurry treatment reactor 1 is in communication with the acid-producing phase reactor 4, the acid-producing phase reactor 4 is in communication with the methanogenic phase reactor 5, and the acid-producing phase reactor 4 includes acid-producing stirring And an acid...

Embodiment 2

[0052] Combine below figure 1 with figure 2 , A detailed description of the treatment method of sewage sludge and kitchen waste according to an embodiment of the present invention.

[0053] Such as figure 2 As shown, the processing method of sewage sludge and food waste in an embodiment of the present invention includes the following steps:

[0054] Step 1: Use the food waste pretreatment device 3 to sort the food waste, remove the large-size inorganic matter and refractory organic matter, crush the food waste with the pulverizer, and adjust the food waste The moisture content of garbage;

[0055] Specifically, food waste can be taken from canteens, homes, hotels or restaurants. The food wastes are sorted to remove large-size inorganic matter and refractory organic matter, such as bones, toothpicks, napkins, etc., and then The remaining food waste is crushed with a grinder, and the particle size after crushing is 1 mm ~ 3mm. The moisture content of the food waste is adjusted to...

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Abstract

The invention provides a sewage sludge and kitchen waste treatment device and a treatment method. The device comprises a homogenizing and pulpifying treatment reactor, a sewage sludge pretreatment device and a kitchen waste pretreatment device. The method comprises the following steps that 1, the kitchen waste pretreatment device pretreats kitchen waste and adjusts water content; 2, a dehydrated mud cake pretreated by the sewage sludge pretreatment device and the kitchen waste treated in Step 1 are mixed in proportion, enter the homogenizing and pulpifying treatment reactor for homogenizing and pulpifying treatment, and then become acid production phase feed; 3, the acid production phase feed is added to an acid production phase reactor for hydrolization and acidification, and then becomes acid production phase outlet mud; and 4, the acid production phase outlet mud is added to a methane production phase reactor for anaerobic fermentation, and methane is generated. The sewage sludge and kitchen waste treatment device and the treatment method effectively solve the problems existing in separate treatment of sewage sludge and kitchen waste, and have higher methane yield and organic matter degradation efficiency.

Description

Technical field [0001] The invention belongs to the field of environmental protection and renewable energy, and relates to a treatment device and method for sewage sludge and kitchen waste. Background technique [0002] Sewage sludge is a solid by-product produced in the process of sewage treatment. The amount of sewage sludge produced is increasing with the rapid growth of sewage treatment facilities in my country. As of the end of 2011, the total amount of sludge produced by urban sewage treatment plants nationwide has exceeded 30 million tons (calculated as dewatered sludge with a moisture content of 80%). At present, the treatment methods of sludge stabilization mainly include anaerobic digestion, aerobic digestion, aerobic composting, lime stabilization technology, sludge wet oxidation and other technologies. Among them, the sludge anaerobic digestion method can not only realize the stabilization of sludge, but also produce biogas methane, so as to realize the resource uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/04B09B3/00
CPCY02E50/30
Inventor 王国华谭学军王磊王逸贤沈昌明
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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