外文翻譯--催化氧化-abr-mbr 處理印染廢水的工程實(shí)踐（英文）

1、 Engineering Practicing on Dyeing and Printing Wastewater Treatment by Multi-Methods of Catalytic Oxidation- Anaerobic-MBR Zhou Shu-kui College of Environmental Science and Engineering, Hunan University, Changsha, PR

2、 China E-mail: zhoushukui@usc.edu.cn Zeng Guang-ming College of Environmental Science and Engineering, Hunan University, Changsha, PR China Liu Ying-jiu School of urban construction University of South China Hengya

3、ng , China Abstract—The multi-methods of catalytic oxidation- anaerobic- MBR has been applied to treatment a dyeing and printing wastewater on a engineering after anglicizing characteristics of the wastewater quality.

4、It has been proved by actual operation that the method is a simple and effective with cost low, stable operation, simple maintenance and significant effectiveness for dyeing and printing wastewater treatment. Keyword

5、s- dyeing and printing wastewater; catalytic oxidation; anaerobic; engineering practice I. PROJECT OVERVIEW The main pollutants of printing and dyeing wastewater discharged by Guangdong Province were composed of dye,

6、 sizing agent, additives, oil solutions, acid-base, fiber-impurity, sand substances, inorganic-salt and so on, with the characteristic of high temperature, high concentration of pollutant, composition complicacy and

7、changes of quantity and water quality. The direct discharge of wastewater would induce seriously environmental pollution. The production capacity of wastewater is 1000m3/d and water quality data was measured by the l

8、ocal environmental protection department (Table 1). The first-order of “National Overall Discharge Standard of Sewage” (GB8978-1996) was implemented in the effluent. After treatment, wastewater was used to clean works

9、hop equipment, reforest, flush ground and so on. TABLE I. THE QUALITY DATA AND EMISSION STANDARDS OF WASTE Item pH Color (multiple) Oil (mg/ L) SS (mg/ L) CODcr (mg/ L) BOD5 (mg/ L) NH-N3 (mg/ L) Filed d

10、ata 6-8 1600 800 3000 1800 1500 20 Standard 6-9 ?50 ?0.5 ?70 ?60 ?30 ?0.5 II. WASTEWATER TREATMENT PROCESS The sizing agent used during printing and dyeing process is composed of natural starch, natural s

11、lurry, chemical synthesis slurry PVA which is a kind of refractory synthetic organics. Along with natural slurry replaced by synthetic sizes, the biodegradability of printing and dyeing industry wastewater become infe

12、rior gradually. Biological treatment is used as a major method (about 80% above) in treating domestic dye- bearing wastewater Since the 1970s [1]. But the color removal efficiency of biological treatment was low about

13、50%~60%. And the removal efficiency of refractory organic compounds was not effective, so physical and chemical methods, such as coagulation-sedimentation, active carbon adsorption, air floatation, coke cinder filtra

14、tion and so on, were added. But there were still lots of problems like low-efficient, instability, high-cost, during the practical operation [2]. After compared Figure 1. waste and sludge treatment process flow diagr

15、am. with effect analysis of test and considered cost impact, we determined that acid deposition + catalyzed oxidation + anaerobic +MBR integrative processing technology was designed, and process was shown in figure 1[

16、3, 4, 5]. III. PROCESS DESCRIPTION AND MAIN STRUCTURE The total amount of wastewater was 1000m3/d, and the plant design capacity was 1200m3/d. After large pieces of debris were removed by grille, sewage entered grease

17、 traps which rebuilt by raw regulating pond and entered aerated conditioning tank. On the one hand, grease was further removed by gas flotation; on the other hand, balance the water quantity and quality through nicel

18、y complex and the wastewater entered reactor by using pump lift. To make big Funded item: The research project of Hunan science and technology Bureau (2010FJ4121). The Hunan key discipline of municipal engineering. Th

19、e Hunan key laboratory of pollution control and resource reuse. 1201978-1-4577-0290-7/11/$26.00 ©2011 IEEETABLE II. THE QUALITY DATA OF WASTE AFTER TREATED Date pH Color (multiple) Oil (mg/L) SS (mg/L) COD

20、cr (mg/L) BOD5 (mg/L) NH-N3 (mg/L) 0903 2007 6.9 30 0.31 25.2 44.2 11.7 0.263 0904 2007 7.1 28 0.30 24.6 42.5 11.2 0.322 0812 2009 7.4 28 0.25 25.2 39.8 11.1 0.213 0813 2009 7.3 29 0.27

21、24.7 41.5 10.6 0.245 The date monitoring by Environmental Monitoring Station at different times showed that the effluent quality meets the first grade criteria of integrated wastewater discharge standard (GB8978-19

22、96). Conduct full-scale test on treatment effect on 8/2009, the partial results is shown in Table2. VI. SUMMARY ? The poor biochemical purification ability of printing and dyeing wastewater was very difficult to trea

23、t industrial wastewater. To achieve the desired result, according to the characteristics of complex wastewater, the wastewater was treated by combined process which promoted oxidation, reduced big molecular substance

24、s, increased small member material. So it enhanced the biodegradability of wastewater, and the efficiency of aerobic biological treatment to guarantee effluent up to the standard long-term stability. ? Anaerobic wa

25、s used as the first pretreatment method because of many kinds of residual dyeing material and complicated constitution, which was effective for the degradation of big molecular substances, especially the destruction

26、of chromogen contained in the dyestuff. ? Pre-permanent magnet scale-borer was placed before catalytic apparatus. When water flowed through magnetic field, water molecule generated distortion,, reversion, shake under

27、 in presence of an magnetic field, and strengthen molecule so that chain and bulk like macromolecule (H2O)n were dissociated into signal dimolecular (H2O)2, increased the water activity and changed the physical const

28、ruction of water. The needle crystal of magnesium and calcium scales could be converted into granule crystals, making it couldn’t interlace with one another and formed incrustation which attached to wall and pipe wall

29、 to condense into very small particles that deposited in bottom and discharged to achieve anti-scaling function. ? Most of dying and printing wastewater was alkaline. Before entering anaerobic treatment, to make big

30、 molecular substances such as printing inks scission and evaporation, the pH value must be adjusted to about 4.0 before. In order to avoid second pollution causing by reducing substances like hydrogen sulfide, sulphu

31、ric acid was not be used in the pH adjustor because the post-treatments unit was anaerobic. ? The actual operation shown that the system was stable in operation and resistance to shock loading, the treatment was si

32、mple, the sludge left was little, the sludge was stable, the water quality was good, also the result was remarkable. The field monitoring result indicated that the treated water could reach the first class dischargin

33、g standard of our country, and initial project and operation costs were low, overcoming membrane pollution and congestion due to using submerged frame MBR which maintained large membrane flux and saved air-water back

34、wash equipment and decreased energy consumption. Adjust accounts of by actual, the actual power consumption was 920kw/d (<1.0kw/ m3), the actual lethal cost was about 0.5yuan/m3,so the total running cost was 1.0~

35、1.1yuan / m3. REFERENCES [1] JinSheng Lou, New process and design on water pollution [M]. Beijing: Ocean press, 2002, 142-150.(in Chinese) [2] MaoJun Jiang, MaoJun Jiang, The engineering case study of dyeing and printi

36、ng wastewater treatment [J]. Pollution Control Technology, 2007, Vol.20, No.4, 97-99. (in Chinese) [3] ShuKui Zhou, ShiRon Xu, HongZe Zuo, Coagulation-engineering practicing on leather wastewater treatment [J]. Environ

37、mental Science and Technology, Vol.27 (4), 64-80. (in Chinese) [4] M.N. Rao, A.K. Datta, Waste water treatment (Second edition) [M].London: Oxford & IBH publishing Co. Pvt. Ltd, 1987, 232-243. [5] XuSi Yan, JinChu

38、Fan, Water supply engineering (4th edition) [M] Beijing: Chinese Architecture Industry Press, 1995 6: 232-257. [6] HuanBin Cui, XiaoMei Song, Dong Li, Application dyeing and printing wastewater treatment by PAC-contact