Method for conditioning municipal rest sludge with industrial epoxy resin wastewater
A technology of epoxy resin and excess sludge, which is applied in the field of environmental engineering, can solve the problems of expensive treatment costs and difficult wastewater treatment, and achieve the effects of convenient and feasible operation, avoiding secondary pollution, and simple process
Inactive Publication Date: 2010-09-08
SHANGHAI UNIV
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Problems solved by technology
[0004] At present, in terms of sludge dehydration treatment, it is generally used to treat sludge by adding PAM (polyacrylamide) flocculant in China to reduce the water content to about 80%. The treatment cost is relatively expensive, so looking for existing Some conditioners and improved processing techniques are necessary
High-salinity wastewater is very common in industry, which contains a large amount of inorganic salt ions and even organic matter. Due to the high salinity, the treatment of this wastewater is still a problem at this stage
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Embodiment
[0016] Embodiment: take the residual sludge of the municipal sewage plant as the test object, its initial water content is 99.5%, after it is left to settle for a period of time, the supernatant is removed, and now the water content is 98%. Take 500ml of the sludge and place it in a 2000ml beaker, then add 1000ml of industrial epoxy resin wastewater, stir for 15 minutes, let it settle for 15 minutes, then remove the supernatant; then put the remaining sludge floc water in Centrifuge in the centrifuge tube at 4000rpm for 10 minutes, then remove the supernatant, and the average moisture content of the sludge flocs left at the end is 76.3%, which basically reaches the municipal treatment where the moisture content before sludge treatment drops to 80%. If required, it can be directly landfilled or processed in other ways.
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The invention relates to a method for conditioning municipal rest sludge with industrial epoxy resin wastewater, which belongs to the technical field of environment engineering. The essentials of the method are as follows: a certain amount of industrial epoxy resin wastewater is added into sludge with 99 percent of water content; the volume ratio of the sludge to the high-salinity industrial epoxy resin wastewater which serves as the conditioner is 1:1 to 1:2, so that the water content of the sludge is reduced when the sludge is changed from a free water form to a sludge floc form so as to meet the pre-treatment requirement before sludge treatment, i.e. meet and satisfy the requirement on the 80 percent of pre-treatment water content of municipal sludge, and then carry out landfill, burning or other agricultural treatment. The method for conditioning municipal rest sludge with industrial epoxy resin wastewater has the advantages of simple process and convenient and feasible operation.
Description
technical field [0001] The invention relates to a method for regulating municipal residual sludge with industrial epoxy resin wastewater, belonging to the technical field of environmental engineering. Background technique [0002] Urban sewage treatment plants produce a large amount of sludge in the process of sewage treatment. Due to the high water content of the sludge, if it is not treated, it will take up too much space, and the transportation cost of the sludge will be greatly increased. Therefore, sludge dewatering treatment in sewage plants is very important. Usually, these organic sludges are composed of hydrophilic negatively charged colloidal particles, the particle size is very uneven and very small, the shrinkability is large, and the filtration specific impedance value is also large, so the filtration and dehydration performance is poor, and the sludge Before mechanical dehydration, sludge dewatering agent needs to be added to condition it, so as to improve its...
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IPC IPC(8): C02F11/14
Inventor 钱光人邓涛邹庐泉唐杰李娜
Owner SHANGHAI UNIV
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