Comments on final disposal method for sludge

Author: Taida machine       Release time:2016-08-19
Reading guidance:With the increasing of urban sewage treatment plants, a large increase in the sludge content, the final disposal of the sludge has become the focus of attention and difficult problems. Sludge properly
   With the increasing of urban sewage treatment plants, a large increase in the sludge content, the final disposal of the sludge has become the focus of attention and difficult problems.
   Sludge properly handle disposal is not only environmental protection work must face a difficult problem, but also the solid waste treatment disposal companies in the eyes very attractive and challenging business. But for a long time, domestic for the effective disposal of sludge did not cause enough attention, related technology development especially weak foundation for the industrialization demonstration project work, and sometimes it is difficult for the sludge of proper treatment and disposal to provide authority for selection of technology route, but also the lack of policy and meet the requirements of the complete sets of processing equipment.
  1. Traditional sludge composting methods
 The core is the use of microbial treatment, and the life activities of treatment must be in a certain time and space cost, which resulted in a mismatch with the upstream process of time and space, so in the absence of the land resource is not feasible. Some other contain the process steps of the biological treatment technology, most need to preprocess on the front, or terminal on the back end, some front end have to deal with. This not only can not solve the contradiction, this time and space at the same time, by the introduction of other process steps will make the process longer, this means that the need to more from the external input of energy and resources, so that the overall economic decline.
 2. Sludge incineration technology
   The sludge incineration generates carbon dioxide and water, due to completely change its energy state, the problem will follow. First, the sludge incineration must be dry prior to treatment, the water will be reduced from 80% to 50% for combustion, itself is a huge energy consumption process, combined with the efficiency of processes, compared with the incineration of energy, the results may also be a second, The loss outweighs the gain. process; the various elements in the sludge in the combustion process are in different forms are released, such as nitrogen, sulfur, phosphorus and trace elements of various oxides, including two British and other harmful substances produced by the combustion process, not only put forward higher technical requirements for incineration equipment, at the same time the back of these substances will exhaust the initial investment and operation cost greatly increase the equipment. The result is likely to be negative and generate economic benefits New pollution problems.
  3. Other disposal technology- heat drying
  Other such as all kinds of sludge drying process is also just in the middle of the process, so after the treatment and utilization of technology to solve, it is likely just an overall increment of pollutants the process of changing the form of. Dry heat is "intermediate" processing technology, and incineration or compost to become terminal processing technology; and the sludge dry requires a lot of energy input at the same time, and accompanied by toxic or harmful gases. Other similar techniques mostly from microbial compost link.
  4. Whole set equipment for realizing reclamation aim of sludge- HIROS
   The technology of sludge treatment, the technical route of industrialization quickly and efficiently; to some easy degradation of organic matter in sludge in the oxidation reaction of releasing energy to maintain continuously, the external energy demand is lowest; while the remaining unreacted organic matter can be part of the high adsorption of organic fertilizer in the form of resource utilization, the play the maximum ecological benefits. The technology fully comply with the matching principle, the principle of level stability, recycling of resources in the shortest principle, has obvious advantages: 1) covers an area of province. Because the processing of sludge can be fast, Nissan Nissin.2) low energy consumption. Because not only did not change the form of energy, but also can be used as much as possible in its internal the.3 high efficiency energy digestion). But the process of consuming more energy resources, all kinds of organic compounds in the group can be used as fertilizer, products with high added value and environmental benefits. Therefore, the technology is a high positive return of the terminal processing technology, the current stage, in the world, there is no more suitable than the HIROS sludge terminal disposal technology.
 

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