CN102329044B - Method for treating wastewater from bamboo product - Google Patents
Method for treating wastewater from bamboo product Download PDFInfo
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- CN102329044B CN102329044B CN2011102204739A CN201110220473A CN102329044B CN 102329044 B CN102329044 B CN 102329044B CN 2011102204739 A CN2011102204739 A CN 2011102204739A CN 201110220473 A CN201110220473 A CN 201110220473A CN 102329044 B CN102329044 B CN 102329044B
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Abstract
The invention discloses a method for treating wastewater from a bamboo product. In the method, the wastewater from the bamboo product is added with water for diluting and added with drugs for adjusting the pH value; and then the adjusted wastewater is sequentially treated by an anaerobic expanded sludge bed (EGSB) reactor, a membrane bioreactor (MBR) and a nano filtration (NF) device and is finally discharged after reaching the standard. According to the method disclosed by the invention, 97 percent of CODCr (Chemical Oxygen Demand) in boiling wastewater in the processing process of the bamboo product is removed by using an EGSB-MBR combined process, thus the burden of post treatment is reduced and methane generated by the treatment process is reasonably recovered. The effluent in a biochemical pool is deeply treated by adopting a nanofiltration technology, so that the final effluent reaches national sewage discharge standard.
Description
Technical field
The invention belongs to water-treatment technology field, relate to a kind of method for treating wastewater from bamboo product.
Background technology
The bamboo product industry is important industry of China, yet, be not effectively addressed with a large amount of waste water that produces in bamboo product industry production process (being bamboo product waste water), brought huge challenge to ecotope.Bamboo product mainly contains bamboo floor, bamboo curtain splint class, bamboo mat class, bamboo offset plate, bamboo craftwork product, bamboo charcoal and bamboo biological products class (as fresh Succus Bambusae, bamboo vinegar liquid, Folium Bambosae flavone etc.), different according to its product, bamboo product waste water roughly can be divided into waste water from cooking, alkali soaks waste water, bamboo pulp waste water and dyeing waste-water.These waste water all contain the large amount of organic such as bamboo cell content, its major ingredient comprises take sugar as main cell slurries class material, add in take acetic acid and small molecules straight chain humic acids as main organic acid substance, dyeing course dyestuff macromole and amino acid, Folium Bambosae flavone class, tannins and plant pigments class material, the high (average COD of concentration of organic wastewater
CrBe about 20000mg/L), colourity is large, pollutant component is complicated, directly enters the severe contamination that can cause surface water in body water, even underground water all can be subjected to a certain extent pollution in the larger area of factory's density.This not only threatens local ecology and water body environment, also will bring serious harm to local resident's domestic water and tap water.
Current, due to bamboo product waste water is lacked ripe treatment process, the discharging of this type of waste water has caused great impact to some regional ecotopes, and then has influence on the Sustainable development of whole bamboo product industry.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of method for treating wastewater from bamboo product is provided.The method realizes the processing of bamboo product waste water high-efficiency and biogas effective recycling, has ensured the Sustainable development of bamboo product industry.
A kind of method for treating wastewater from bamboo product, the method comprises the steps:
1) bamboo product waste water is added water by equalizing tank and dilute, and add sheet alkali control pH value;
2) waste water enters anaerobic expanded sludge bed reactor (EGSB) reactor by lift pump and carries out anaerobic treatment after acidication, and the biogas that produces in fermenting process enters gas-holder and recycles after desulfurization;
3) anaerobic effluent enters respectively membrane bioreactor (MBR) reactor that anoxic pond, Aerobic Pond and ultrafiltration film group device (UF) form and carries out a biological disposal upon, adopt gas blower to carry out continuous aeration to Aerobic Pond, the water outlet part of ultra-filtration membrane is back to the anoxic pond circular treatment, and another part enters UF and produces in pond;
4) waste water produces pond by UF and enters nanofiltration device (NF) and carry out advanced treatment, nanofiltration membrane water outlet qualified discharge or advance reuse factory in, and the concentrated solution of nanofiltration generation is partly refluxed to equalizing tank, and another part is back to the MBR system and carries out circular treatment.
Bamboo product waste water is through dilution, former water COD
CrConcentration is controlled at 20000 mg/L, adopts sheet alkali that the pH value is adjusted to 6.8～7.3.
Waste water residence time in the EGSB anaerobic digestor after regulating is 100～120h.
In whole MBR system, MBR treatment system hydraulic retention is 20 hours, and in reactor, sludge concentration is controlled at 6000～8000mg/L.
The diaphragm type of nanofiltration device membrane module used is polyamide composite film, and single membrane element nominal useful area is 7.6m
2, for 2000ppm NaCl solution, at 25 ℃ of water temperatures and intake pressure 0.48MPa(70psi) and water production rate under condition is 220.8L/h(1400gpd), rejection is 85%-95%.
The present invention takes the bamboo product waste water thinking of the comprehensive regulation more after pretreatment.Waste water, through dilution and acidication, is stablized the anaerobic treatment load, is conducive to effective operation of bulk treatment system.Waste water is after EGSB reactor anaerobic treatment, and most organism is degraded, and simultaneously the biogas that produces in the anaerobic treatment process is carried out recycling, has realized energy recovery.Water outlet is carried out a biological disposal upon by the MBR system again, further degraded organic pollutant wherein, and the crown_interception by nanofiltration membrane is removed larger molecular organics remaining in waste water finally, makes its qualified discharge.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, at first bamboo product waste water is added water by equalizing tank and dilute, and add sheet alkali control pH value to 6.8～7.3, control the COD of former water
CrConcentration is 20520 mg/L, NH
4 +The concentration of-N is 713 mg/L, and specific conductivity is 5205 μ s/cm, and colourity is 2100 times.Waste water after acidication, enters the EGSB anaerobic jar and carries out the anaerobic treatment of 100 ~ 120 h, and the biogas of generation fully utilizes after desulfurization is processed, and anaerobic effluent enters the MBR treatment system, at this moment waste water COD
CrConcentration is 1860 mg/L, NH
4 +The concentration of-N is 147 mg/L, and specific conductivity is 1302 μ s/cm, and colourity is 970 times.
Comprehensive wastewater after anaerobic treatment decrease organic loading enters the MBR treatment system, further removes colourity and organism in waste water, and the hydraulic detention time of MBR system is 20 h, and in reactor, sludge concentration is controlled at respectively 6000 ~ 8000 mg/L.Comprehensive wastewater COD after the MBR biological treatment
CrConcentration is 583 mg/L, NH
4 +The concentration of-N is 42 mg/L, and specific conductivity is 765 μ s/cm, and colourity is 430 times.Wherein the part return of waste water carries out circular treatment to anoxic pond, and another part enters nanofiltration device and carries out advanced treatment.
Waste water after nanofiltration device is processed, the COD of final outflow water
CrConcentration is 42 mg/L, NH
4 +The concentration of-N is 0.9 mg/L, and specific conductivity is 38 μ s/cm, and colourity is 3 times, and effluent quality is lower than national sewage comprehensive emission standard (GB8978-1996) primary standard.The dense water that nanofiltration process produces is back to respectively equalizing tank and the MBR system is carried out circular treatment, the film water outlet discharge or factory in reuse.
Claims (1)
1. a method for treating wastewater from bamboo product, is characterized in that the method comprises the steps:
Step 1) adds water with bamboo product waste water by equalizing tank dilutes, and adds sheet alkali control pH value to 6.8～7.3, controls the COD of former water
CrConcentration is 20520mg/L, NH
4 +The concentration of-N is 713mg/L, and specific conductivity is 5205 μ S/cm, and colourity is 2100 times;
Step 2) waste water enters anaerobic expanded sludge bed reactor (EGSB) reactor by lift pump and carries out the anaerobic treatment of 100～120h after acidication, and the biogas that produces in fermenting process enters gas-holder and recycles after desulfurization; After processing, waste water COD
CrConcentration is down to 1860mg/L, NH
4 +The concentration of-N is down to 147mg/L, and specific conductivity is down to 1302 μ S/cm, and colourity is down to 970 times;
The step 3) anaerobic effluent enters respectively membrane bioreactor (MBR) reactor of anoxic pond, Aerobic Pond and ultrafiltration film group device (UF) composition and carries out a biological disposal upon, hydraulic detention time is controlled at 20h, in reactor, sludge concentration is controlled at respectively 6000～8000mg/L, adopt gas blower to carry out continuous aeration to Aerobic Pond, the water outlet part of ultra-filtration membrane is back to the anoxic pond circular treatment, and another part enters UF and produces in pond; After this stage processing, waste water COD
CrConcentration is 583mg/L, NH
4 +The concentration of-N is 42mg/L, and specific conductivity is 765 μ S/cm, and colourity is 430 times;
Step 4) waste water produces pond by UF and enters nanofiltration device (NF) and carry out advanced treatment, nanofiltration membrane water outlet qualified discharge or advance reuse factory in, and the concentrated solution of nanofiltration generation is partly refluxed to equalizing tank, and another part is back to the MBR system and carries out circular treatment; The COD of final outflow water
CrConcentration is 42mg/L, NH
4 +The concentration of-N is 0.9mg/L, and specific conductivity is 38 μ S/cm, and colourity is 3 times.
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| CN2011102204739A CN102329044B (en) | 2011-08-03 | 2011-08-03 | Method for treating wastewater from bamboo product |
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| CN2011102204739A CN102329044B (en) | 2011-08-03 | 2011-08-03 | Method for treating wastewater from bamboo product |
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| CN102329044A CN102329044A (en) | 2012-01-25 |
| CN102329044B true CN102329044B (en) | 2013-11-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103508636A (en) * | 2013-09-25 | 2014-01-15 | 黄健 | Food industrial wastewater treatment system |
| CN105668952A (en) * | 2016-04-25 | 2016-06-15 | 广东东日环保有限公司 | Smart two-membrane integrated sewage treatment system |
| CN106495394A (en) * | 2016-10-20 | 2017-03-15 | 安吉逢春污水处理有限公司 | A kind of bamboo product processing waste water processing system and its processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113047A (en) * | 2007-06-20 | 2008-01-30 | 江南大学 | Method of treating hard-degrading high concentrated organic wastewater |
| CN101125721A (en) * | 2006-08-18 | 2008-02-20 | 东丽纤维研究所（中国）有限公司 | Technique for reusing sewage |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125721A (en) * | 2006-08-18 | 2008-02-20 | 东丽纤维研究所（中国）有限公司 | Technique for reusing sewage |
| CN101113047A (en) * | 2007-06-20 | 2008-01-30 | 江南大学 | Method of treating hard-degrading high concentrated organic wastewater |
Non-Patent Citations (3)
| Title |
|---|
| 竹制品蒸煮废水的处理;邓喜红;《化工设计通讯》;20071231;第33卷(第4期);第58页第2.2、2.3节 * |
| 邓喜红.竹制品蒸煮废水的处理.《化工设计通讯》.2007,第33卷(第4期), |
| 陈智远 等.UASB／生化工艺处理竹制品废.《中国给水排水》.2010,第26卷(第24期), * |
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Owner name: ANJI FENGCHUN SEWAGE TREATMENT CO., LTD. BEIJING E Free format text: FORMER OWNER: JINSHAN ENVIRONMENT PROTECTION GROUP CO., LTD. BEIJING ECOJOY WATER TECHNOLOGY CO., LTD. Effective date: 20131018 |
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Effective date of registration: 20131018 Address after: 310027 Hangzhou, Zhejiang Province, Xihu District, Zhejiang Road, No. 38, No. Applicant after: Zhejiang University Applicant after: Anji Fengchun Sewage Treatment Co., Ltd. Applicant after: Beijing Ecojoy Water Technology Co., Ltd. Address before: 310027 Hangzhou, Zhejiang Province, Xihu District, Zhejiang Road, No. 38, No. Applicant before: Zhejiang University Applicant before: Jinshan Environmental Protection Group Co., Ltd. Applicant before: Beijing Ecojoy Water Technology Co., Ltd. |
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