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Leather wastewater treatment system and method

A leather wastewater treatment system technology, applied in animal processing wastewater treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the large fluctuations in water quality and quantity of tannery wastewater, poor leather wastewater treatment effect, Sewage treatment environment is complex and other problems, to achieve the effect of simplifying the microbial denitrification process, reducing sludge production, and improving biodegradability

Pending Publication Date: 2021-11-16
恒臻无锡生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a leather wastewater treatment system and method, the purpose of which is to solve the problem of tannery wastewater with large fluctuations in water quality and volume, complex components, heavy pollution load, large sludge production, organic matter that is not easily biodegradable, Inorganic salts and Cr 3+ and S 2- and other toxic compounds, as well as the technical problem of poor treatment effect of leather sewage caused by traditional biological deammonization technology due to the complexity of the actual sewage treatment environment

Method used

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  • Leather wastewater treatment system and method

Examples

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Effect test

Embodiment 1

[0028] The leather waste water treatment system that present embodiment provides, specific technical scheme is as follows:

[0029] The leather wastewater treatment system includes a jet water distribution mixed digestion system, and a microbial agent containing heterotrophic nitrifying bacteria is placed in the jet flow water distribution mixed digestion system. The jet water distribution mixed digestion system includes a treatment tank 1, an intermediate pool 2 and a sedimentation tank 3. The middle part of the treatment tank 1 is provided with a biofilm 11. The biofilm 11 divides the treatment tank 1 into an aeration zone 12 and a jet mixing zone 13. The aeration Area 12 is provided with a water suction pipe 64 connected to the ejection pipeline of the second jet mixer 62 shown, and the nitrifying liquid in the digestion area is sucked into the jet mixer 62 and mixed into the jet mixing area 13, and the nitrification can be controlled by the backflow regulating valve 65 Liq...

Embodiment 2

[0042] In this example, the basal medium of the heterotrophic nitrifying bacteria Delftia tsuruhatensis HT01 is: MgSO4 7H2O 0.05g / L; K2HPO41g / L; NaCl 2g / L; FeSO4 7H2O 0.4g / L; NaHCO3 1.5g / L; ·2H2O 0.5g / L; trace elements 1mL / L; pure water.

[0043] Trace elements (1L): CuSO4·5H2O 0.075g; ZnSO4·7H2O 0.3g; CoCl2·6H2O 0.375g; MnCl2·2H2O 0.3g; EDTA 0.5g; NaMoO4·2H2O 0.22g; H3BO4 0.014g; pure water 1L.

[0044] Conventional carbon source medium: Add 0.4g / L NH4Cl as the only nitrogen source in the basal medium, and then add 2g / L sucrose, glucose, fructose, sodium citrate, sodium succinate, sugarcane molasses or sodium acetate as the only nitrogen source carbon source.

[0045] Taking leather sewage as the experimental material, the sewage is not suitable for the growth of autotrophic ammonia oxidizing bacteria due to its high salinity (about 20000mg / L). ~768mg / L. The experiment was carried out in two rounds. In the first round of the experiment, the experimental group inoculated 3....

Embodiment 3

[0051] The leather wastewater of a leather industry company in Xinji City used the leather wastewater treatment system and method provided in Example 1. The leather industry wastewater system can treat 1800m3 / d of wastewater per day. The amount of mud discharge is 60 tons (dry mud) / every day, the PAC consumption of the primary sedimentation tank is 200kg / d, and the PAM consumption is 8kg / d. After the leather waste water treatment system provided in Example 1 is put into use, the mud discharge amount is 40 tons (dry mud) / Every day, the PAC of the primary sedimentation tank is stopped, and the amount of PAM is 5kg / d. The pulse anaerobic tank can not only reduce the amount of sludge, but also reduce the amount of chemicals, and reduce operating costs for the enterprise.

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Abstract

The invention belongs to the technical field of microbial wastewater treatment, and particularly relates to a leather wastewater treatment system and a method. According to the leather wastewater treatment system and method, the purposes of effective denitrification and sludge reduction in leather wastewater can be achieved, the problem of blockage of inflow water of the jet flow water distribution mixing digestion system is solved, SS in the wastewater can be reduced, the investment is reduced by 60% compared with that of a conventional anaerobic tank, the heterotrophic nitrifying bacterium agent is easy to produce, materials are easy to obtain, the cost is low, the process is simple and economic benefits are huge.

Description

technical field [0001] The invention belongs to the technical field of microbial wastewater treatment, and in particular relates to a leather wastewater treatment system and method. Background technique [0002] With the rapid development of leather industry, tannery wastewater is more and more harmful to the environment. At present, the competition in the market environment is increasingly fierce, and the development potential of leather and its products cannot be ignored. The quality and quantity of tannery wastewater fluctuate greatly, the composition is complex, the pollution load is heavy, and the sludge production is large. It contains organic substances, inorganic salts and Cr that are not easy to biodegrade 3+ and S 2- It is a kind of industrial wastewater that is difficult to treat. In addition, the denitrification of leather wastewater is one of the keys to the treatment of leather wastewater. The traditional biological denitrification technology first needs to o...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/16C02F103/24
CPCC02F3/34C02F2101/16C02F2103/24
Inventor 邓敬轩曹振国邱勋向斯单晓红
Owner 恒臻无锡生物科技有限公司
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