Bacterium compound for reduction of wastewater treatment and sludge - sewage treatment, pollution - water industries

Screening of activated sludge from a specific bacterium in the mixture with the EM fungi

, the orthogonal test, the dominant bacteria of the best compound dosage, and further verification by the dynamic model test results. The results showed that, based Sewage Features added with different amounts of complex dominant bacteria, not only effectively reduce excess sludge production, but also improve the water target. [Key words] compound bacterium; activated sludge; sludge reduction Currently, more than 90% Municipal Wastewater Treatment Use of activated sludge. With large-scale sewage treatment plant construction and operation of a corresponding increase in residual sludge. Sludge treatment will not only increase the cost of sewage treatment, will also bring secondary pollution, such as odor, parasite eggs, organic matter, heavy metals, etc., contaminated water and land resources. Therefore, to ensure effective treatment, based on how to reduce the amount of residual sludge is the subject of more research. A sewage treatment plant north is used in oxidation ditch treatment process using activated sludge process of sewage purification. As the plant is in Industrial Area, 70% of sewage wastewater, complex components, difficult to deal with each of the volume of sludge discharge more than 3.0 10t, sludge treatment process of pharmaceutical cost of adding more than 100 million The remaining sludge landfill shipping costs nearly 4O million yuan. Early experiments indicated that [1] Effective Microorganisms (EM for short bacteria) on the sewage treatment has some effect, but little effect on sludge reduction. I According to the northern city of wastewater characteristics and advantages of the EM fungi were extracted bacteria mixture, through laboratory tests and field simulation test, investigated compound bacterium handle different dosage of a city north of the sewage and sludge reduction effect. 1 complex with the determination of dominant bacteria Take aerobic reaction of Northern section of a wastewater treatment plant sludge, dilution pour plate method and the method Isolation crossed, the species of bacteria isolated from the 2O passage through the screening and training, determine the relative stability of 7 properties the bacteria, and then selected by validation tests on the sewage and sludge treatment effect is obvious the three dominant bacteria (denoted as 5,6,8). EM fungi is an 8O 1O 5 families a variety of beneficial micro-organisms to human culture from the multi-functional complex microbial flora, is a new complex microorganisms. Compound is the dominant bacteria and three kinds of dominant EM fungi bacteria extracted according to a certain proportion of compound to get. 2 laboratory tests 2.1 Test materials and analysis methods Water: from a sewage treatment plant in northern vortex grit chamber (after coarse grid and fine grid after). Activated sludge: aerobic reaction from the same section of sewage sludge. EM fungi: biological agent production plants in Jiangxi providence. Aeration devices: BS A 410 Inflatable Pump . Method: COD using standard potassium dichromate method: TP spectrophotometry using ammonium: NH-N Determination using Nessler; sludge changes in the measured sludge concentration (105oC bake dry weight method) to measure. 2.2 Test methods Take water and a sewage treatment plant sludge aeration tank, the light of the actual running process wastewater treatment plant in six 2000mL beaker by a large water 1500mL, 300mL of sludge are mixed, with a 410 BS intermittent pneumatic pump Aeration, or aeration 3h, standing 5h, re-aeration 3h, standing 5h. Compound dosage of dominant bacteria in Table 1. 2.3 Test Results and Discussion Indicators and removal of water results in Table 2.

Bacterium compound for reduction of wastewater treatment and sludge - sewage treatment, pollution - water industries

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