Method for treating low-temperature slaughter wastewater

A technology for slaughter wastewater and treatment methods, which can be applied in animal processing wastewater treatment, flotation water/sewage treatment, adsorption water/sewage treatment, etc., and can solve the problems that cannot be applied in alpine regions

Inactive Publication Date: 2013-03-27
山东名科环保工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these processes cannot be

Method used

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specific Embodiment approach

[0022] The present invention will be further elaborated below through the detailed description of specific embodiments, but it is not intended to limit the present invention, but only for illustration.

[0023] Material Description:

[0024] Polyaluminum chloride was purchased from Zibo Zhisheng Chemical Co., Ltd., with a molecular weight of 174.45;

[0025] Polyacrylamide was purchased from Zibo Zhisheng Chemical Co., Ltd., with a molecular weight of 700 million;

[0026] The ultrafiltration membrane system was purchased from Tianjin Motianmo Technology Co., Ltd., model: UOF 4;

[0027] Volcanic rock, quartz sand, and activated carbon were purchased from Wuxi Bishuilan Environmental Protection Technology Co., Ltd.;

[0028] The sludge from the secondary settling tank is taken from Xining Sewage Treatment Plant, and the influent temperature is 5-10°C.

Embodiment 1

[0030] The above-mentioned process was used to carry out a small-scale experiment on the spot of a slaughterhouse. After testing, the components of the slaughter wastewater were as follows:

[0031] Suspended solids concentration (SS) is 1000mg / L, COD is 1500mg / L, BOD 5 800mg / L, NH 3 -N is 50mg / L, animal oil is 100mg / L; temperature is 5°C; experimental design water inflow is 6L / h.

[0032] A treatment method for low-temperature slaughter wastewater, comprising the following steps:

[0033] (1) After the slaughter wastewater is filtered through a mechanical grid with a grid gap of 3mm to remove coarse substances in the wastewater; it is filtered through a 250-mesh microfilter to remove tiny suspended solids; then oil separation treatment is performed, and the hydraulic retention time 45min; flow through the regulating tank, the hydraulic retention time is 8h, and the preliminary treatment wastewater is obtained;

[0034] Put the preliminary treated wastewater into the air fl...

Embodiment 2

[0049] The above-mentioned process was used to carry out a small-scale experiment on the spot of a slaughterhouse. After testing, the components of the slaughter wastewater were as follows:

[0050] Suspended solids concentration (SS) is 1000mg / L, COD is 1500mg / L, BOD 5 800mg / L, NH 3 -N is 50mg / L, animal oil is 100mg / L; temperature is 15°C; experimental design water inflow is 6L / h.

[0051] A treatment method for low-temperature slaughter wastewater, comprising the following steps:

[0052] (1) After the slaughter wastewater is filtered through a mechanical grid with a grid gap of 10mm to remove coarse substances in the wastewater; it is filtered through a 150-mesh microfilter to remove tiny suspended solids; then oil separation treatment is performed, and the hydraulic retention time 30min; flow through the regulating tank, the hydraulic retention time is 10h, and the preliminary treated wastewater is obtained;

[0053] Put the preliminary treated wastewater into the air f...

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Abstract

The invention relates to a method for treating low-temperature slaughter wastewater. The method comprises the following steps: (1) grating slaughter wastewater of 5-15 DEG C through a machine; filtering by a microfilter; conducting oil removal treatment to obtain primarily treated waste water; introducing the primarily treated waste water into an air floatation system; and adding aluminum polychlorid, adding polyacrylamide to obtain pretreated waste water; (2) introducing pretreated waste water into an ultrafiltration membrane system to obtain ultrafiltration membrane permeation liquor; (3) leading the ultrafiltration membrane permeation liquor to flow through filler in a biological aerated filter to obtain biological aerated filter effluent water; and (4) adsorbing the biological aerated filter to obtain biological aerated filter effluent water by activated carbon; and then conducting chlorine dioxide disinfection, or ozone oxidation to obtain purified recycle water. The treatment method is good in treatment effect, stable to run, can work normally within the temperature range from 5 DEG C to 15 DEG C, thereby providing a new method for treating high-concentration organic wastewater at low-temperature regions.

Description

technical field [0001] The invention relates to a treatment method for low-temperature slaughter wastewater, belonging to the technical field of food wastewater treatment. Background technique [0002] Food industry wastewater represented by slaughter wastewater has the characteristics of high BOD and easy biochemical degradation, and mature biochemical treatment technology or a combination of biochemical and other treatment technologies are mainly used. [0003] Slaughter wastewater mainly includes: cleaning wastewater before slaughter, pig blood and cleaning wastewater during slaughter, cleaning wastewater of viscera, and ground cleaning wastewater. Slaughter wastewater has the following characteristics: high organic content, good biodegradability, high content of suspended solids, wastewater contains a lot of blood, fur, animal viscera, grease and animal feces. Slaughter wastewater is easily biodegradable organic wastewater with high suspended solids. At present, the tre...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/40C02F1/24C02F1/52C02F1/56C02F1/44C02F1/28C02F1/50C02F1/78C02F103/22
Inventor 刘玉梅万东
Owner 山东名科环保工程有限公司
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