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Dołączył: 29 Paź 2010
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 Wysłany: Czw 20:50, 30 Gru 2010 Temat postu: moncler jackets Activated Sludge, domestication an |
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Activated Sludge, domestication and biofilm biofilm
Type the same, the processing system has been running dry in the dewatered sludge as the source for bacteria culture bacteria. For example, take a hosiery dyeing wastewater treatment system in the hollow of a tree frame filter press mud dry after printing and dyeing plant in Anhui province as the activated sludge treatment system provenance. Will account for the total volume of aeration tank of about I% of dry sludge, plus a small amount of water broken up, and then add the appropriate amount of concentrated quality industrial water and waste, bacteria culture according to the method, sludge formation and growth very quickly to the desired concentration. As the dry sludge easy to transport, this method is not suitable for biological treatment system adjacent to remote areas. 2.3 Industrial waste water directly in the Culture of industrial waste water of certain plant nutrients than the whole, such as canned food factory, meat processing plants, soybean plants, etc., you can use this type of industrial waste water directly to culture bacteria. The other plant waste water, although the nutrients are still full, but the lack of concentration,[link widoczny dla zalogowanych], bacteria culture is often a long period, for such waste as may be appropriate to add some of the plant starch slurry waste, canteen Migan Shui,[link widoczny dla zalogowanych], flour soup (carbon source) or urea, sulfur, ammonia, ammonia (nitrogen) and other nutrients, bacteria culture to speed up the process. For example, Shanghai is the third printing and dyeing mill and then added some of dyeing wastewater plant nutrition, live successfully develop the required raw sludge Jf. 2.4 toxic or biodegradable industrial wastewater in the Culture of toxic or biodegradable industrial wastewater only to sewage bacteria culture first, and then use the domestication of industrial wastewater. 3 in the Culture biological phase of the succession process of culture bacteria in the process, with changes in environmental conditions, mainly BOD (ie nutrient concentration) continue to lower the system type and amount of microorganisms play a corresponding change . Flagella of bacteria and insects as infiltration through the cell membrane, the dissolved organic matter in water absorbed into the body as a nutrient, so they can be highly contaminated, untreated water in the large population. Amoeba pseudopod class can eat solid organic debris to nutrition, it must also survive in the organic rich,[link widoczny dla zalogowanych], polluting waters. Early in the bacteria culture, the concentration of organic matter in water (BOD) is high, the sludge has not yet formed, no significant treatment effect, when a large number of free bacteria in the aeration tank can be seen, then there is the pole plant flagellate flagella cysticercosis and dynamic Puerto insect pests, in addition can also see a certain amount of window dressing, but soon appeared more capable predators of bacteria ciliate protozoa: first small predators of bacteria, such as bean-shaped swimming ciliates worms, insects and other kidney-shaped appearance of large numbers of small ciliates and then there roaming predatory insects, splitting I: 1 and other insects, and paramecium. With the progress of culture bacteria, organic nutrients in water is consumed gradually, the number of heterotrophic bacteria decreased, swimming ciliates gradually gave way to sessile ciliates, they are a caudal fixation on the growth in the sludge flocs. Therefore, the clock insects sessile ciliates marks the emergence and growth of activated sludge to the gradual formation and growth. At the same time, crawling insects and other ciliates,[link widoczny dla zalogowanych], such as port fiber also appeared in the sludge,[link widoczny dla zalogowanych], the organic residues and their dead organisms for food. With the growing maturity of the sludge. Treatment effect of higher and higher, reduced to very low organic matter in water, they have appeared in scattered sludge rotifers eat, so there is sludge rotifer high degree of maturity and a sign of purification. Bacteria culture of microorganisms in the process of a regular succession of Figure 1. Imprison an activated sludge process of biological succession of four domesticated in industrial wastewater treatment system in the Culture stage of late, the amount of sewage and applied nutrition decreased gradually increasing the proportion of industrial waste water, and finally all of the receiving wastewater, the process as domesticated. Domestication process in the sludge, sludge microorganisms occurring in the two changes. One is to make use of the organic pollutants in wastewater gradual increase in the number of microorganisms, can not take advantage of the gradual death, out; the other is able to adapt to the wastewater microorganisms, organic matter in wastewater under induced, resulting in the use of the substance can be decomposed induced enzyme. Bacterial decomposition of organic matter must be carried out with the participation of enzymes. Enzyme is a protein, a large molecular weight, highly specific enzymes as well. Therefore, a variety of wastewater to decompose organic matter, there must be many kinds of enzymes, and have a certain amount of each enzyme. But the bacteria are small and can not accommodate so many enzymes, only the presence of certain organic compounds, the bacteria induced to produce a certain number of chemical substances on the catalytic role of this enzyme, which is called the induced enzyme. Figure 2 shows the initial E. coli bacteria rely on the inherent decomposition of the body of the enzyme glucose, using glucose as a substrate to form the first peak of growth, the oxidation of glucose the enzyme is also known as constitutive enzyme. After depletion of glucose, the strain induced in the lactose, the production of enzymes to break down lactose, the use of lactose as the substrate so as to form a second growth peak, so
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