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[來源:www.haradaip.com] [作者:淤泥固化] [日期:18-11-07]

關于淤泥處理的研究
Study on silt disposal
一個關于油泥處理的研究于2009年在中國進行。添加生物添加劑的生物修復法和傳統的堆肥進行對比。含油淤泥和油污染的土壤取之于油田。干淤泥的總碳氫化合物含量為327.7 -371.2 g·kg-1,和油污染的土壤的總碳氫化合物含量為151.0 g·kg-1。在運用添加劑之前,在淤泥和土壤中添加不同比例的秸梗、木屑、沙子和純油并混合均勻。這些淤泥和土壤組分用來無控制處理和通過激活原有微生物處理。而在堆肥中,糞肥和木屑添加到淤泥中,總碳氫化合物含量為101.4 g·kg-1。淤泥的化學固化劑,尤其是河道淤泥或市政污水淤泥的固化 隨著城市污水處理廠的大量建設,污水處理量和淤泥產量都不斷增加。淤泥中含有大量的微生物.病原體.重金屬以及有機污染物,其含水量一般都在80%以上,處理不當,將造成二次污染。目前淤泥的處理方式主要有農業.焚燒和填埋,還有很大量的淤泥沒有經過任何處理,隨意丟棄。由于淤泥的含水率高,土力學性能差,污染物含量高,現在的處理方式都存在環境污染.處理成本過高,同時也容易引起填埋場工程地質災害。
A study on sludge disposal was carried out in China in 2009. Bioremediation with biological additives is compared with traditional compost. Oily soil and oil contaminated soil are taken from oil fields. The total hydrocarbon content of dry silt is 327.7-371.2 g kg-1, and that of oil-contaminated soil is 151.0 g kg-1. Before the use of additives, different proportions of straw, sawdust, sand and pure oil were added to the silt and soil and mixed evenly. These sludge and soil components are used for uncontrolled treatment and activation of original microorganisms. In composting, manure and sawdust are added to the sludge, and the total hydrocarbon content is 101.4 g kg-1. With the construction of municipal sewage treatment plants, the amount of sewage treatment and the output of sludge are increasing. Mud contains a large number of microorganisms, pathogens, heavy metals and organic pollutants, whose water content is generally more than 80%, improper treatment will cause secondary pollution. At present, the main treatment methods of sludge are agriculture, incineration and landfill, and a large amount of sludge is discarded at will without any treatment. Because of the high water content, poor soil mechanical properties and high pollutant content of the sludge, there is environmental pollution in the present treatment methods. The treatment cost is too high, and it is also easy to cause landfill engineering geological disasters.
淤泥能否填埋取決于淤泥或者淤泥與其它添加劑形成的混合體的巖土力學性能,淤泥填埋時要求十字板抗剪強度≥25kpa,無側限抗壓強度≥50kpa.淤泥經過常規脫水后,含水率 80%以上,字板抗剪強度<10kpa,不能滿足填埋的最低的要求。
Whether the sludge can be landfilled depends on the geotechnical mechanical properties of the sludge or the mixture of the sludge and other additives. When the sludge is landfilled, the shear strength of the cross plate is required to be greater than 25 kPa and the unconfined compressive strength is greater than 50 kpa. After conventional dewatering, the water content of the sludge is over 80%, and the shear strength of the zigzag plate is less than 10 kpa, which can not meet the minimum requirements of landfill. Please.
為此,需要提高淤泥的力學性質,降低含水率。傳統的方式是添加水泥和石灰等固化劑,也使用礦化垃圾作為添加混合料,這些方式需要添加大量的材料,添加量<30%,增加了垃圾量,如果再遇水,將轉變成淤泥。采用添加化學藥劑的方式固化淤泥,添加量可以控制在10%以內,一般養護時間在1~3天,即可達到填埋要求的強度和含水率。上述現象表明,生物修復可作為一種有效同樣經濟的方法處理含油淤泥的方法。
Therefore, it is necessary to improve the mechanical properties of silt and reduce the moisture content. The traditional way is to add curing agent such as cement and lime, and also use mineralized garbage as additive mixture. These ways need to add a large number of materials, the amount of adding less than 30%, increase the amount of garbage, if water encounters again, it will turn into silt. When chemical agents are added to solidify the sludge, the amount of chemical agents can be controlled within 10%, and the general maintenance time is 1 to 3 days, which can meet the strength and water content required by landfill. These phenomena indicate that bioremediation can be used as an effective and economical method to treat oily sludge.

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