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Novel treatment method for leather sewage

A treatment method and technology for leather sewage, applied in biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can reduce the operating cost, reduce the processing time and improve the processing effect.

Active Publication Date: 2016-09-07
HEBEI DONGMING INDUSTRIAL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned traditional treatment methods have low ammonia nitrogen removal rate and are difficult to meet the discharge standards; the large sludge output brings difficulties to subsequent sludge treatment and increases treatment costs; the steps are complicated, greatly affected by incoming water, and the process parameters require Repeated debugging for different incoming water, the operation is difficult, and the treatment effect is unstable

Method used

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Experimental program
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Effect test

Embodiment 1

[0043] Expansion of treated bacteria:

[0044] (a) Add 1 kg of treated bacteria to 9 kg of culture medium for primary expansion to obtain 10 kg of primary expansion medium; the culture medium is an aqueous solution of sugarcane molasses with a mass fraction of 4%; the pH of the culture medium is 5.0; aeration The volume is 70L / min; the culture time is 20 hours;

[0045] (b) Add 10 kg of the first-stage expansion culture solution obtained in step (a) into 90 kg of the culture solution for secondary expansion to obtain 100 kg of the second-level expansion culture solution; the culture medium is an aqueous solution of sugarcane molasses with a mass fraction of 4% ; The pH of the culture solution is 5.0; the ventilation rate is 70L / min; the culture time is 22 hours;

[0046] (c) Add 100kg of the secondary expansion culture solution obtained in step (b) into 100kg of the culture solution for three-level expansion to obtain 200kg of activated bacteria liquid; the culture medium is ...

Embodiment 2

[0056] Expansion of treated bacteria:

[0057] (a) Add 1 kg of treated bacteria to 9 kg of culture solution for primary expansion to obtain 10 kg of primary expansion solution; the culture solution is an aqueous solution of sugarcane molasses with a mass fraction of 6%; the pH of the culture solution is 5.5; aeration The volume is 90L / min; the culture time is 24 hours;

[0058] (b) Add 10 kg of the first-stage expansion culture solution obtained in step (a) into 90 kg of the culture solution for secondary expansion to obtain 100 kg of the second-level expansion culture solution; the culture medium is an aqueous solution of sugarcane molasses with a mass fraction of 6%. ; The pH of the culture solution is 5.5; the ventilation rate is 90L / min; the culture time is 26 hours;

[0059] (c) Add 100kg of the secondary expansion culture solution obtained in step (b) into 100kg of the culture medium for three-level expansion to obtain 200kg of activated bacteria liquid; the culture med...

Embodiment 3

[0069] Expansion of treated bacteria:

[0070] (a) Add 1 kg of treated bacteria to 9 kg of culture medium for primary expansion to obtain 10 kg of primary expansion medium; the culture medium is an aqueous solution of sugarcane molasses with a mass fraction of 5%; the pH of the culture medium is 6.0; The volume is 80L / min; the culture time is 22 hours;

[0071] (b) Add 10 kg of the first-level expansion culture solution obtained in step (a) into 90 kg of the culture medium for second-level expansion to obtain 100 kg of the second-level expansion culture solution; the culture medium is an aqueous solution of sugarcane molasses with a mass fraction of 5% ; The pH of the culture solution is 6.0; the ventilation rate is 80L / min; the culture time is 24 hours;

[0072] (c) Add 100kg of the secondary expansion culture solution obtained in step (b) into 100kg of the culture solution for three-level expansion to obtain 200kg of activated bacteria liquid; the culture medium is an aqueo...

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Abstract

The invention relates to a novel treatment method for leather sewage. By treating sewage by virtue of treating bacteria, the novel treatment method comprises the following steps: adjustment, aeration, sludge digestion, precipitation, sludge circulation, and the like. A primary sewage flocculation process in a traditional treatment method is omitted, and early adjustment of a sewage environment required in a traditional biological method is omitted, so that the operation steps are simplified, the COD and the removal rate of ammonia nitrogen are substantially increased, the dispersion of stink produced in an anaerobic digestion process is avoided, and the operating environment is improved; and meanwhile, the sludge is digested by virtue of the treating bacteria, so that the discharging amount of sludge is reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a novel treatment method for leather sewage. Background technique [0002] The leather industry will produce a large amount of wastewater in the process of tanning. This type of wastewater has the characteristics of complex components, high suspended solids, and high oxygen consumption. With the continuous improvement of society's environmental governance requirements, how to deal with leather wastewater is an issue that leather manufacturers pay more and more attention to. [0003] Tannery wastewater is usually treated by the following methods: use sieve filtration or natural sedimentation to remove hair, skin meat, skin flakes and sediment, etc., and then use coagulation sedimentation, biological filter or activated sludge and other biochemical methods for treatment. The above-mentioned traditional treatment methods have low ammonia nitrogen removal rate and are difficult to me...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/34
CPCC02F1/52C02F3/02C02F3/301C02F3/302C02F3/34C02F3/348C02F9/00C02F2103/24C02F2209/44
Inventor 谢胜虎谢少明银德海
Owner HEBEI DONGMING INDUSTRIAL GROUP CO LTD
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