China has long faced the exponential increase of wastewater. Therefore, sludge as the byproduct of wastewater treatment is a worldwide and difficult problem to treat and dispose. Many cities in China are trying to find an appropriate method of achieving this. However, due to a lack of funding, technology and research, some methods suitable for local conditions are still not available, even in the most modern and biggest cities in China. This thesis is intended to describe the method used for the treatment and disposal of sludge from industries now in Shanghai, Beijing and Chongqing. Compared with these three cities, Beijing produces more sludge per day, while Shanghai has the least sludge production. Further, the industrial waste piping system is not separated from the domestic system in these three cities. Moreover, the percentage of treated sludge is still very low in Shanghai, Beijing and Chongqing. Among these three cities, even the highest treatment rate of sludge is 35.41% (Beijing). The lowest is only 10.08% (Chongqing). Considering that much more sludge will be produced in the next a few years, the current situation in these three cities presents a stern challenge. Also, a calculation about the cost of disposal of sludge in these cities is included in this thesis. Incineration is most expensive method of disposal of sludge in China, while composting is the cheapest. Considering the huge population, the current technology and the economic conditions in China, composting is the best option for the disposal of sludge.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:hh-15593 |
| Date | January 2011 |
| Creators | ZILU, WANG |
| Publisher | Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET) |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.002 seconds