1、3 附录 外文原文 Sludge treatment of sustainability analysis One idea As urban sewage and industrial sewage collection and sewage treatment rate of increase in efficiency improvements (such as the chemical phosphorus removal sludge can increase by 30%), making total amount of sludge in the world increased
2、dramatically. Land application of sludge disposal is still a way out for sustainable development will depend mainly on the following factors: Carbon and nutrient recycling； Aroundthe availabilityof agricultural land and its distance； Low-input and operating costs； Stringent legal requirements and co
3、ntrol procedures to ensure the safety and sewage sludge fertilizer. However, according to the actual situation or local regulations, the land application of sewage sludge before the producers had to be advanced, more expensive treatment in order to meet further requirements, such as compost, heat tr
4、eatment or high-temperature sterilization digestion. However, a large part of the sludge, for obvious reasons can not be used in agriculture, such as micro-pollutants, bacteria excessive or lack of fertilizer, far away and so on. Sometimes may be due to distrust of the public not be accepted. In thi
5、s way, sludge or landfill or destroyed by high temperature oxidation of NOx. Sustainability strategies Carrying out any technical studies, public acceptance should be assessed. Even from the technical, cost and environmental impact in terms of are the best approach may also be no good to explain to
6、the public but was denied. Regardless of what treatment can be identified in the future treatment should be safe, environmental protection (protection of people and flora and fauna) and should add value (material and / or energy recovery). For these purposes, sludge treatment should be reduced sludg
7、e volume, improved sludge quality and reduce harmful emissions. This paper will introduce a number of important processes, in order to meet the needs of operators, and involving other technical or regulatory constraint. （ 1） The landof rational utilization As a prerequisite, sludge should be at leas
8、t stable, that is, the actual request was not running on the smell. Local laws may require or in the future will be even higher: sludge may be required to disinfect / Pap sterilization. Sterilization requirement of a mandatory goal: to pathogens such as intestinal virus, typhoid bacteria, nematodes,
9、 parasite eggs and other samples after treatment should be detected. Biological treatment.Process volatile use of biological sludge.Such as anaerobic digestion (AD), self-supporting aerobic digestion (ATAD) process. Chemical treatment.The degradation of volatile organic compounds to curb corruption.
10、 Such as the acidic nitrite SAPHYRTM process. Physical treatment.The degradation of volatile organic compounds to curb corruption. Such as sludge incineration. Most of these processes are stable and sterile, but the extent of disinfection depends on the number of parameters such as HRT (hydraulic retention time) or chemical dosage. Thermal oxidation process is clearly far beyond the stability of sludge,
