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Easily-degradable high-concentration industrial wastewater treatment method and system

A high-concentration wastewater and industrial wastewater technology, applied in multi-stage water treatment, water/sewage treatment, water treatment parameter control, etc., can solve problems such as failure to meet effluent standards, biochemical system sludge expansion, and long system start-up period. Achieve the effect of ensuring the effect of biochemical treatment, increasing the sedimentation rate, and improving the ability of biochemical treatment

Pending Publication Date: 2020-10-13
北京新林环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problems in most of the wastewater treatment systems currently used are: 1) Although the wastewater has good biodegradability, there are still some refractory organics that need to be removed by chemical methods; 2) The monomer treatment unit often requires additional feeding to assist in the removal of pollutants , but internal products may cause secondary pollution, increasing the difficulty and cost of subsequent treatment; 3) Conventional biochemical systems often have problems such as sludge bulking, sludge loss, and long system start-up periods; 4) The treatment system is sensitive to COD, ammonia nitrogen, The removal capacity of total nitrogen and total phosphorus is limited and cannot meet the effluent standard

Method used

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  • Easily-degradable high-concentration industrial wastewater treatment method and system
  • Easily-degradable high-concentration industrial wastewater treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, a breeding enterprise in Hebei discharges 100 m3 / d of breeding wastewater. The wastewater has high CODcr value (COD≤3000mg / L), high ammonia nitrogen content (NH4-N≤500mg / L), high total phosphorus content (TP≤50mg / L), and high suspended solids content (SS≤1000mg / L).

[0038] Effluent standard: COD<200mg / L, NH4-N<80mg / L, TP<8mg / L, SS<100mg / L.

[0039] Wastewater is treated by using the easily degradable high-concentration industrial wastewater treatment system of the present invention. The wastewater treatment system sequentially includes a grid, a primary sedimentation adjustment tank, an integrated biochemical treatment device for high-concentration wastewater, a magnetic coagulation sedimentation tank, and a disinfection tank. Among them, the dosage of magnetic iron powder is 100g / L, the dosage of activated carbon powder is 100g / L, and the dosage ratio is 1:1. The influent water quality and removal rate of each section are shown in Table 1 below.

[...

Embodiment 2

[0044] In this embodiment, the wastewater is the same breeding wastewater as in Embodiment 1, and the dosage of magnetic iron powder and activated carbon powder was changed in the laboratory test, and the experimental data obtained are shown in Table 2 below.

[0045] Table 2

[0046]

[0047] According to Table 2, it can be seen that with the increase of the dosage of magnetic iron powder and activated carbon powder (that is, the dosage is 50-100g / L), the COD, NH 4 - The removal rates of N, TP, and SS gradually increased. When the dosage of magnetic iron powder and activated carbon powder reached 100g / L respectively, the removal rate indicators of various pollutants in the system reached the peak. And when the dosage is greater than 100g / L (that is, the dosage is 100-250g / L), the removal rate of various pollutants in the system tends to be flat, and the indicators no longer rise. It can be seen that the optimal dosage of magnetic iron powder and activated carbon powder is...

Embodiment 3

[0049] In this example, the wastewater is the same breeding wastewater as in Example 1. In the laboratory test, the ratio of magnetic iron powder and activated carbon powder was changed, and the experimental data obtained are shown in Table 3 below.

[0050] table 3

[0051]

[0052] According to Table 3, under the condition that the total dosage of magnetic iron powder and activated carbon powder remains unchanged (that is, the total dosage is 200g / L), changing the mass ratio of the two substances, with the increase of Fe / C mass ratio , system COD, NH 4 - The removal rate of N, TP, and SS also increases accordingly; when the mass ratio of Fe / C is equal to 1, the removal rate of various pollutants in the system reaches the optimum, and when it is greater than this value, the treatment effect of the system will not be significantly improved .

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Abstract

The invention relates to the field of industrial wastewater treatment, and particularly relates to an easily-degradable high-concentration industrial wastewater treatment method and system. The systemcomprises a pretreatment section, a high-concentration wastewater biochemical treatment device, a magnetic coagulation sedimentation tank and a disinfection tank, wherein magnetic iron powder and activated carbon powder are added into a biological contact oxidation tank of the high-concentration wastewater biochemical treatment device, an aerobic filler and an aeration system are installed, and the concentration of dissolved oxygen in the tank is controlled to be 2-4mg / L. The action of the magnetic iron powder and the activated carbon powder runs through a biological and chemical reaction system, an adsorption micro-electrolysis environment can be formed, a huge specific surface area can be provided for microorganism growth, the sedimentation rate of flocculent sludge is increased, sludgeloss and the occupied area of the process are reduced, and the biochemical treatment effect is guaranteed.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment method and system for easily degradable high-concentration industrial wastewater. Background technique [0002] Industrial wastewater is usually classified according to the chemical properties of the main pollutants it contains, and targeted treatment technologies are selected based on different types of pollutant components. Among them, industrial wastewater with high concentration of organic pollution and good biodegradability is mostly treated by anaerobic biochemical technology, that is, anaerobic microorganisms are used to decompose and convert organic matter in sewage or sludge into inorganic products such as methane and carbon dioxide. [0003] The problems in most of the wastewater treatment systems currently used are: 1) Although the wastewater has good biodegradability, there are still some refractory organics that need to be removed by chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/488C02F3/30C02F9/00C02F2101/30C02F2209/08C02F2209/10C02F2209/14C02F2209/18C02F2301/08
Inventor 李萌陈倩韩少科贠小淇
Owner 北京新林环境科技有限公司
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