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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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| Crushed grille comparison of sludge treatment and disposal routes abroad |
| Edited：HuanChuang technology Date：2013-1-6 13:43:46 |
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World of sludge disposal for a long time, its traditional disposal methods sanitary landfill, sludge incineration, land use, ocean dumping.
The sanitary landfill began in the 1960s, developed countries early treatment sludge a way. It has the advantages of simple operation, and low processing costs. However, this method requires a large area of ??the venue while processing technology requires high standards permeate environmental hazards. With the increase in population, the scarcity of land resources, the sanitary landfill sludge need to take up a lot of land, consuming considerable, its application will be restricted. Implementation of the Act (2006) requires that all European countries for the organic content in the solid waste landfill must diminishing solid waste landfill in the EU in 1999, where sewage sludge is the decree solid waste One of the object types. According to the EU's statistics, the data show that, due to regulations and policies guiding role has changed a lot in the way of sludge disposal, sludge landfill to a significant decline in the proportion. EU member states, France, Germany, Belgium, Netherlands, Luxembourg, Ireland and other countries sludge landfill declining trend.
Sludge incineration is higher sludge contains organic ingredients, has a certain calorific value characteristics to dispose of sludge. The sludge incineration advantage in the thoroughness of its treatment, the reduction rate can reach 95 percent, faster processing, organic sludge all carbonized, heavy metals (in addition to mercury) Almost all trapped in the ash. In Japan, the EU accounted for more than 55% of the total sludge treatment is also more than 10%. But this method will produce large amounts of highly toxic substances and harmful gases, exhaust processing requires specialized equipment. The way expensive situation from abroad, the incineration investment as well as operation and maintenance costs, other process 2 times to 4 times.
A long history of land use of sludge, sludge dispersed a consumptive way, refers to the coverage, spray, injection sludge as an organic fertilizer or soil conditioner, applied to the soil to improve the soil in order to achieve nature, the purpose to improve soil fertility. Sludge is rich in organic matter and trace elements, can be used in agricultural, forest, horticulture, the degraded soil remediation and waste site reclamation. Land use has capable of turning waste into treasure, full recycling of sludge in a variety of nutrients as well as low-power advantages, recent years has received more and more attention and abroad. Sludge in agriculture in Germany in 1990, the proportion of about 30% in 1998 to nearly 70%. The British ocean disposal of sludge is prohibited in the European Union, to choose the land use of sludge to dissolve not marine processing large amounts of sludge.
Ocean dumping has simple operation, do not need special treatment device, but the sludge into the sea will seriously affect the marine ecological environment, the EU decided in December 1998 after 31 prohibits discharging into the sea of ??sludge. Countries also started to prohibit the dumping of sludge into the ocean.
Shows that the disposal of sludge abroad focused on sludge incineration and land-use, sanitary landfill and ocean dumping has begun to gradually withdraw from the stage of history. Apart from the above sludge disposal methods, the sludge brick, cement and sludge of sludge system made oil but also abroad to develop the appropriate method of sludge disposal. |
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