CN106277620A - A kind of leather cleaning production technology - Google Patents
A kind of leather cleaning production technology Download PDFInfo
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- CN106277620A CN106277620A CN201610781192.3A CN201610781192A CN106277620A CN 106277620 A CN106277620 A CN 106277620A CN 201610781192 A CN201610781192 A CN 201610781192A CN 106277620 A CN106277620 A CN 106277620A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F2103/24—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The open a kind of leather cleaning production technology of the present invention, this technique includes that collecting leather waste water carries out sulphur removal process；Preliminary sedimentation tank precipitates, and processes partial sludge, and water outlet enters flotation tank and removes impurity particle；Flotation tank water outlet sequentially enters oxygen compatibility pool Aeration tank and carries out denitrification reaction, and after denitrogenation, waste water entrance aerobic aeration pond carries out nitration reaction, and the water outlet of aerobic aeration pond flows into sedimentation in secondary sedimentation tank, and supernatant flows into water circulating pipe；Preliminary sedimentation tank, flotation tank, oxygen compatibility pool, aeration oxidation pool and second pond drain into sludge concentration tank, and through filter press filter pressing in bulk, centralized collection processes.Hardly degraded organic substance is degraded to nontoxic, the small-molecule substance of easily biological-degradable by waste water treatment process of the present invention, reduces organic concentration.First the present invention carries out desulfurization process, and then air-flotation process removes impurity particle, oxygen Aeration tank denitrification reaction of holding concurrently, aerobic aeration pond nitration reaction, and organics removal and ammonia nitrogen improve the biodegradability of waste water.
Description
Technical field
The invention belongs to leather cleaning production technical field, relate to a kind of leather cleaning production technology.
Background technology
Along with developing rapidly of leather industry in recent years, leather waste water has become as one of important polluter.According to statistics,
At present there is a family of large, medium and small Leather Factory more than 20000 in China, year waste discharge amount reach 8000-12000 ten thousand tons, account for whole nation Industry Waste
The 0.3% of water inventory.The Cr about 3500 tons of discharge, float 120,000 tons in these waste water, COD is 180,000 tons, and BOD is 70,000 tons,
Ammonia nitrogen 100,000 tons.Along with development and people's raising to environmental requirement of economic society, the process of leather waste water is increasingly subject to
The concern of people.
The waste water produced in leather production process (includes that immersion fleshing, depilation liming, deliming are soft essentially from Rou Qian workshop section
Chemical industry sequence), tanning process (including pickling, tanning processes), finishing workshop section (include retanning, neutralize, dye, stuffing operation).Skin
Leather waste water is usually expressed as the S of high concentration2-And Cr3+, COD, BOD5Concentration is high, ammonia nitrogen concentration is high, and biodegradability is poor, containing big
The neutral salt such as the chloride of amount, sulfate.
Leather waste water be mainly complicated component, pollutant kind is various, intractability is high, pH value is high, colourity is high, concentration relatively
High organic wastewater, processes and has certain difficulty.Wastewater toxicity is relatively big, and human body, soil, animal and plant growth are all produced danger
Evil.Particularly washing tower waste water B/C relatively low, biodegradability is poor, organic concentration is high, variation water quality is relatively big, and organic constitution
Predominantly macromolecule polyalcohol, structure with linked rings, what current domestic application was more have oxidation ditch, SBR and biological contact oxidation process, one
As process technique be difficult to degrade, belong to the high concentrated organic wastewater of relatively difficult degradation.
Summary of the invention
It is an object of the invention to provide a kind of leather cleaning production technology.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of leather cleaning production technology, comprises the following steps:
(1) collect leather waste water, add sulphuric acid regulation pH value of waste water and stand 3-5h precipitated sulfur to 7-9, input ferrous sulfate
Changing ferrum, iron sulfide is collected by filtration, filtrate enters regulation pre-exposure pond；
(2) regulation pre-exposure pond water outlet enters preliminary sedimentation tank precipitation, processes partial sludge, and water outlet enters flotation tank, logical in water
Enter dissolved air, make water produces substantial amounts of microbubble, and promote it to attach on impurity particle, form proportion floating less than water
Body, under buoyancy, floats up to the water surface, it is achieved solid-liquid separation, and scum silica frost is scraped slag cleaning by Slag Scraping Device timing, enters sludge-tank；
(3) flotation tank water outlet sequentially enters oxygen compatibility pool Aeration tank and carries out denitrification reaction, and after denitrogenation, waste water enters
Oxygen Aeration tank carries out nitration reaction, and the water outlet of aerobic aeration pond flows into sedimentation in secondary sedimentation tank, and supernatant flows into water circulating pipe；
(4) preliminary sedimentation tank, flotation tank, oxygen compatibility pool, aeration oxidation pool and second pond drain into sludge concentration tank, through filter press
Filter pressing in bulk, centralized collection processes.
Scheme further, described regulation pre-exposure pond is internally installed impeller.
Scheme further, described second pond supernatant water outlet flows into flocculation sedimentation tank, adds flocculant and carry out flocculation sediment
Reaction, flocculant be concentration be the PAM solution of 1.5 ‰, the dosage of described PAM is 2.5-3.5mg/L.
Scheme further, in described step (3) aerobic aeration pond, the concentration range of dissolved oxygen is 1-3mg/L.
Beneficial effects of the present invention:
1, hardly degraded organic substance is degraded to nontoxic, the small-molecule substance of easily biological-degradable by waste water treatment process of the present invention,
Reduce organic concentration.
2, first the present invention carries out desulfurization process, and then air-flotation process removes impurity particle, the oxygen anti-nitre of Aeration tank denitrogenation of holding concurrently
Change reaction, aerobic aeration pond nitration reaction, organics removal and ammonia nitrogen, improve the biodegradability of waste water.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
A kind of leather cleaning production technology, comprises the following steps:
(1) collecting leather waste water, addition sulphuric acid regulation pH value of waste water, to 7, puts into ferrous sulfate standing 3h and precipitates iron sulfide,
Iron sulfide is collected by filtration, and filtrate enters regulation pre-exposure pond, and pre-exposure pond is internally installed impeller in regulation, is stirred aeration；
(2) regulation pre-exposure pond water outlet enters preliminary sedimentation tank precipitation, processes partial sludge, and water outlet enters flotation tank, logical in water
Enter dissolved air, make water produces substantial amounts of microbubble, and promote it to attach on impurity particle, form proportion floating less than water
Body, under buoyancy, floats up to the water surface, it is achieved solid-liquid separation, and scum silica frost is scraped slag cleaning by Slag Scraping Device timing, enters sludge-tank；
(3) flotation tank water outlet sequentially enters oxygen compatibility pool Aeration tank and carries out denitrification reaction, and after denitrogenation, waste water enters
Oxygen Aeration tank carries out nitration reaction, and controlling the concentration range of dissolved oxygen in aerobic Aeration tank is 3mg/L, and aerobic aeration pond goes out current
Entering sedimentation in secondary sedimentation tank, second pond supernatant water outlet flows into flocculation sedimentation tank, adds flocculant and carries out flocculation precipitation reaction, flocculant
For the PAM solution that concentration is 1.5 ‰, the dosage of PAM is 2.5mg/L；
(4) preliminary sedimentation tank, flotation tank, oxygen compatibility pool, aeration oxidation pool and second pond drain into sludge concentration tank, through filter press
Filter pressing in bulk, the dry mud pressed outward transport is delivered to heating center after filling or deliver to further the dehydration of shingle machine and is burned.
Embodiment 2
A kind of leather cleaning production technology, comprises the following steps:
(1) collecting leather waste water, addition sulphuric acid regulation pH value of waste water, to 9, puts into ferrous sulfate standing 5h and precipitates iron sulfide,
Iron sulfide is collected by filtration, and filtrate enters regulation pre-exposure pond, and pre-exposure pond is internally installed impeller in regulation, is stirred aeration；
(2) regulation pre-exposure pond water outlet enters preliminary sedimentation tank precipitation, processes partial sludge, and water outlet enters flotation tank, logical in water
Enter dissolved air, make water produces substantial amounts of microbubble, and promote it to attach on impurity particle, form proportion floating less than water
Body, under buoyancy, floats up to the water surface, it is achieved solid-liquid separation, and scum silica frost is scraped slag cleaning by Slag Scraping Device timing, enters sludge-tank；
(3) flotation tank water outlet sequentially enters oxygen compatibility pool Aeration tank and carries out denitrification reaction, and after denitrogenation, waste water enters
Oxygen Aeration tank carries out nitration reaction, and controlling the concentration range of dissolved oxygen in aerobic Aeration tank is 1mg/L, and aerobic aeration pond goes out current
Entering sedimentation in secondary sedimentation tank, second pond supernatant water outlet flows into flocculation sedimentation tank, adds flocculant and carries out flocculation precipitation reaction, flocculant
For the PAM solution that concentration is 1.5 ‰, the dosage of described PAM is 3.5mg/L；
(4) preliminary sedimentation tank, flotation tank, oxygen compatibility pool, aeration oxidation pool and second pond drain into sludge concentration tank, through filter press
Filter pressing in bulk, centralized collection processes.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply this
Bright.Case study on implementation obviously easily can be made various amendment by person skilled in the art, and described herein one
As principle be applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to enforcement case here
Example, those skilled in the art are according to the announcement of the present invention, and the improvement made without departing from scope and amendment all should be
Within protection scope of the present invention.
Claims (4)
1. a leather cleaning production technology, it is characterised in that comprise the following steps:
(1) collect leather waste water, add sulphuric acid regulation pH value of waste water and precipitate iron sulfide to 7-9, input ferrous sulfate standing 3-5h,
Iron sulfide is collected by filtration, and filtrate enters regulation pre-exposure pond；
(2) regulation pre-exposure pond water outlet enters preliminary sedimentation tank precipitation, processes partial sludge, and water outlet enters flotation tank, is passed through molten in water
Solve air, make water produces substantial amounts of microbubble, and promote it to attach on impurity particle, form the proportion buoyancy aid less than water,
Under buoyancy, floating up to the water surface, it is achieved solid-liquid separation, scum silica frost is scraped slag cleaning by Slag Scraping Device timing, enters sludge-tank；
(3) flotation tank water outlet sequentially enters oxygen compatibility pool Aeration tank and carries out denitrification reaction, and after denitrogenation, waste water enters aerobic exposure
Gas pond carries out nitration reaction, and the water outlet of aerobic aeration pond flows into sedimentation in secondary sedimentation tank, and supernatant flows into water circulating pipe；
(4) preliminary sedimentation tank, flotation tank, oxygen compatibility pool, aeration oxidation pool and second pond drain into sludge concentration tank, through filter press filter pressing
In bulk, centralized collection processes.
Leather waste water treatment technique the most according to claim 1, it is characterised in that described regulation pre-exposure pond is internally installed to be had
Impeller.
Leather waste water treatment technique the most according to claim 1, it is characterised in that described second pond supernatant water outlet flows into
Flocculation sedimentation tank, adds flocculant and carries out flocculation precipitation reaction, flocculant be concentration be the PAM solution of 1.5 ‰, described PAM's
Dosage is 2.5-3.5mg/L.
Leather waste water treatment technique the most according to claim 1, it is characterised in that in described step (3) aerobic aeration pond
The concentration range of dissolved oxygen is 1-3mg/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610781192.3A CN106277620A (en) | 2016-08-30 | 2016-08-30 | A kind of leather cleaning production technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610781192.3A CN106277620A (en) | 2016-08-30 | 2016-08-30 | A kind of leather cleaning production technology |
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| CN106277620A true CN106277620A (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746360A (en) * | 2017-01-26 | 2017-05-31 | 浙江碧源环保科技有限公司 | High concentration DMF leathers steam liquor treating process |
| CN107216006A (en) * | 2017-08-02 | 2017-09-29 | 江门市新会区龙泉污水处理有限公司 | A kind of Leather waste water treatment system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003053384A (en) * | 2001-08-23 | 2003-02-25 | Nippon Steel Corp | Method for removing nitrogen and phosphorus from waste water and facility therefor |
| CN102503039A (en) * | 2011-11-14 | 2012-06-20 | 安徽银河皮革有限公司 | Nuisanceless leather wastewater treatment method |
| CN104529095A (en) * | 2015-01-16 | 2015-04-22 | 峰安皮业股份有限公司 | Biological denitrification treatment method for tanning synthetic wastewater |
-
2016
- 2016-08-30 CN CN201610781192.3A patent/CN106277620A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003053384A (en) * | 2001-08-23 | 2003-02-25 | Nippon Steel Corp | Method for removing nitrogen and phosphorus from waste water and facility therefor |
| CN102503039A (en) * | 2011-11-14 | 2012-06-20 | 安徽银河皮革有限公司 | Nuisanceless leather wastewater treatment method |
| CN104529095A (en) * | 2015-01-16 | 2015-04-22 | 峰安皮业股份有限公司 | Biological denitrification treatment method for tanning synthetic wastewater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746360A (en) * | 2017-01-26 | 2017-05-31 | 浙江碧源环保科技有限公司 | High concentration DMF leathers steam liquor treating process |
| CN107216006A (en) * | 2017-08-02 | 2017-09-29 | 江门市新会区龙泉污水处理有限公司 | A kind of Leather waste water treatment system and method |
| CN107216006B (en) * | 2017-08-02 | 2020-06-02 | 江门市新会区龙泉污水处理有限公司 | Leather wastewater treatment system and method |
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