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Method and device for treating catering wastewater

A technology for catering wastewater and treatment device, applied in the field of environmental engineering, can solve problems such as poor treatment effect, high oil content, difficult management, etc., and achieve the effects of stable and reliable effluent water quality, high sludge load and low operating costs.

Active Publication Date: 2016-04-13
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the characteristics of dispersive, intermittent, high oil content and difficult management of catering wastewater discharge, some processes have poor treatment effects on it. Therefore, it is necessary to find a technical solution suitable for catering wastewater treatment.

Method used

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  • Method and device for treating catering wastewater
  • Method and device for treating catering wastewater

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Embodiment 1

[0020] Implementation process: The catering wastewater of a certain canteen is used as the influent water source, the flow rate is 6 tons / d, and the sewage enters the alternate flow integrated catering wastewater treatment device after passing through the grille. COD (chemical oxygen demand), BOD (biochemical oxygen demand), SS (solid suspended solids concentration), NH3-N (ammonia nitrogen) in raw water are: 1500~2000mg / L, 850~1200mg / L, 600~900mg / L, 15~20mg / L.

[0021] The overall length, width and height of the equipment are 4500mm, 2000mm and 2500mm respectively, the thickness of the sand filter layer is 300mm, the thickness of the ceramsite layer is 600mm, the particle size of ceramsite is 3~5mm, and the length of the alternating flow reactor is 3500mm. The hydraulic retention time (HRT) is 8h.

[0022] Dissolved oxygen (DO) control: the DO in the front section of the fully mixed reaction zone is 4.0-6.5mg / L, and the DO in the end section of the plug-flow reaction zone i...

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Abstract

The invention discloses a restaurant wastewater treatment method comprising the following steps: performing preliminary oil-water separation treatment on restaurant wastewater, and cleaning out solid residue precipitation; performing aeration on the restaurant wastewater subjected to oil-water separation treatment, thereby providing pressure difference to ensure that water flow alternately flows in a fiber filler area, and providing sufficient oxygen for aerobic bacteria at the same time; arranging quartz sand and a ceramisite filter material to perform interception, adsorption and removal on suspended matters; also arranging a fiber combination filler area to perform membrane-forming and bubble cutting for the wastewater, thus improving the utilization rate of oxygen. According to the restaurant wastewater treatment method and device, the oil-water separation is performed by adopting the property that the density of oil is smaller than that of water, and a plug flow type biological contact oxidation pond which is formed by serially connecting two standard units of a gas-driven circulating flow composite filter material filter tank according to a baffling mode is adopted, so that the wastewater treatment effect can be greatly improved.

Description

technical field [0001] The invention relates to a method and device for treating catering wastewater, in particular to an alternate-flow integrated water treatment method and device for disposing of dispersed or independent catering wastewater, and belongs to the technical field of environmental engineering. Background technique [0002] In recent years, with the continuous development of the economy and the adjustment of the industrial structure, the tertiary industry has developed rapidly, among which the development of the catering industry is particularly rapid, resulting in a sharp increase in the discharge of catering wastewater, and thus the pollution problems are becoming more and more serious . Catering wastewater mainly comes from food preparation, tableware washing, residual food leachate, etc. generated during the business process of the catering industry, which contains a large amount of suspended solids and various organic matter, animal and vegetable oils, pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 李俊林
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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