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Huanchuang (Xiamen) Technology Co.,Ltd
Phone: ：+86 592 5029670
Fax: +86 592 5029673
Email:info@hcwater.com
Add; 22 Guanri Road, Software Park 2, Xiamen, China
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| Garbage crusher, crusher, crushing type grille Online translation of English writing help Mobile pho |
| Edited：HuanChuang technology Date：2014-10-24 11:10:17 |
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| At present our country has built or are being built in the city sewage treatment plant are used for processing the method then flow back to the inlet, so that the actual nitrogen load handling system is higher than the design load, resulting in sewage plant faces problems with incomplete removal of nitrogen.
In the process of sludge treatment in the city sewage, sludge anaerobic digestion process will produce sludge water containing high concentration of NH+4-N, the sludge water including the supernatant, sludge anaerobic digestion tank discharge of the subsequent sludge thickening tank supernatant and sludge dewatering...
Keywords: water treatment of city sewage treatment plant sludge
The significance lies in the sewage treatment process: biological effects of toxic organic pollutants may be in the activated sludge under into the toxic organic pollutants more environmental significance, such as endocrine disrupting chemicals. Because the transformation of product variety, concentration is low, easy to change, tracking and monitoring of liquid liquid extraction and other conventional technology is still unable to carry out the target and its transformation products. Target sludge bioreactor landfill PAHs, influential factors and change of PCBs content to get a thorough treatment of sludge, sludge drying is a key step, and the sludge drying process is to produce benzene and phenol is most obvious stage, therefore, the simulation of sludge drying conditions in this on the one hand, the enterprise is particularly prominent in changsha. Reporters from the Hunan Province nine party environmental protection machinery limited company was informed that, by the company developed a "sludge drying integration disposal device technology", fill the technology gaps in China at present sludge disposal market, and has been successfully applied in both inside and outside the province.
In order to reverse "status only treat sewage does not treat sludge", has been committed to the research and development of sludge treatment nine party environmental protection new technology, successfully developed a cylindrical multi edge multilayer sludge biodrying treatment integrated device and technology, and through the provincial expert technical review live built hall organization, a breakthrough technology bottleneck area of sludge disposal technology large, high energy consumption, serious pollution, the two reduction is not complete and other aspects of the treatment in china. Scientific and technological achievements appraisal conclusion the provincial science and technology department organization think, the technology in the domestic leading level in sludge treatment.
The kernel of this technique are: Bio drying processing integration, implementation of dewatering sludge utilization of biomass energy itself, unit weight is reduced by about 97% after the final sludge treatment, the remaining 3% of the ash can realize resource utilization, achieve zero emissions. If the sludge drying disposal into the mud, can be burned to generate electricity as coal.
And study the releasing characteristics and its influencing factors of 4 types of sewage sludge benzene and phenol, for the purpose of reasonable and effective control of sludge dry benzene and phenol in the process of releasing and provide scientific theoretical basis. This paper has made some valuable research results: (1) at 50 to 300 DEG C dried temperature range, the total release in 4.20 ~ 161.90 g m~ benzene is 4 kinds of sludge (-3); after the temperature higher than 150 DEG C, benzene series of various types of sludge in the release a the increase of less than 150 DEG C; and under the condition that the release amount of benzene in sludge accounted for only benzene total amount of released 5.09%. There is a significant linear relationship between the release amount of benzene sludge under different temperature and in the sludge content.
Nitrogen load is as high as influent 15%~25%. The prior processing mode for the wastewater flow back to the inlet well processing cycle, the actual nitrogen load resulting sewage treatment system is higher than the design load, water quality is not up to the standard. The study on sludge water treatment alone, also enriched nitrifying bacteria, and the sewage treatment system for biological additive, so as to achieve the treatment of sludge water and enhance the feasibility of the dual purpose of nitrification capacity of the sewage treatment system. For the sewage treatment system (mainstream) up and running quickly study without inoculation sludge water treatment system (side stream inoculation) study starting and running, flow system enriched nitrification by the side...
With increasing awareness of environmental protection, sludge treatment and disposal problem widely concerned, sludge treatment industry has also become the environmental protection enterprise the Nuggets ore. This workshop set up "situation and planning of cities and towns throughout the disposal of sludge, the standard interpretation, sludge treatment and disposal of sludge industrial policy discussion and '1025' progress summary" and so on more than 40 theme. Along with the in-depth study of market treatment facilities construction and operation of some topics such as sludge, sludge treatment of new technology and new trend to show.
The effluent sludge: a bomb hidden in the environment ""
To the civilization degree of the city sewage treatment relationship. In 2013, the main city of Changsha 8 sewage treatment plants accumulated processing 406180000 tons of sewage, increased more than 2000 tons more than the previous year, rate of 96.3% sewage treatment, an increase of 1.3 percentage points year-on-year.
Degradation; two is the dechlorination, high chlorine homologs into is not easy to be enriched to low chlorine biphenyl food chain, reduced bioconcentration 2.3 Bailonggang sludge in PAHs, the content of PCBs source apportionment factors influencing PAHs and PCBs content in sewage sludge was concentration and dewatering in pollutants on urban sewage treatment effect sludge water nitrogen municipal sewage sludge of urban sewage water treatment plant with high temperature (30 DEG C), high concentration of ammonia nitrogen (about 1000mg/L) characteristics, the water for the pollution.
The amount of gas pollution of sludge treatment process release than the sewage treatment process is much higher, because this kind of sludge volume, and enrichment of toxic and harmful substances, a large number of therefore, must pass through the harmlessness, reduction and resource processing, two times of sludge pollution of the environment and ultimately to eliminate the. The different types of sludge benzene is the release of components with large differences, the content of benzene in sludge determine the number of the release, and the release intensity depends on the drying temperature.
As long as the sewage treatment facilities to start, will the resulting sludge. At present, Hunan province's total sewage treatment plant built 133 bridges, sewage treatment scale of about 5250000 tons / day, sewage treatment rate reached 72%, the sludge generated more than 1825 tons per day, each year about 666125 tons of sludge.
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