Applied Results and Impact
As the 1st MSW landfill that can meet the national standard for sanitary landfill (GB16889-1997), Tianziling Landfill has been a good demonstration site for other landfill sites in China. It has achieved many honors like "Promotion Campaigns for the Waste Treatment in China" by Chinese Ministry of Construction, "Dubai International Award for Best Practices to Improve the Living Environment" by UNEP.
Two years of monitoring on the bioreactor landfill confirmed that the COD and ammonia of leachate declined and kept at 1060±240 mg l-1 and 1500±600 mg l-1 after operated for 17 months by leachate recirculation. The concentrations of COD and ammonia could be even reduced to 208~249 mg l-1 and 48~73 mg l-1 by leachate subsurface irrigation.
Standards, Indicators, Criteria for Assessment
The construction and operation of Tianziling Landfill meet the national standard "Standard for Pollution Control on the Landfill Site of Municipal Solid Waste" (GB 16889-1997). This standard will be replaced by a new revision of GB16889-2008 from January 1 2008 on. The new standard will have more strict requirements on leachate control.
Institutions/Organization involved
- Hangzhou Tianziling Waste Treatment General Plant
- Zhejiang Provincial Environmental Protection Science and Design Insitute
- Tongji University
Geographic Target Areas for the Innovation
China, and other developing countries that have their MSW characterized as being rich in food waste or putrescible waste.
Expected basic Scientific Progress
- Long term practice and monitoring of the sanitary landfill (about 15 years) for MSW rich in putrescible components.
- Two years of practice and monitoring of the bioreactor landfill for MSW rich in putrescible components.
Contribution to Capacity Building and Education
As the 1st practice of sanitary landfill in China, Tianziling Landfill has been a good demonstration project for other landfills of China. It's long-term experience has substantially contributed to the emendation of the National Standard GB16889. More than 20 R&D programs of national, ministerial or provincial levels have their field studies locate in Tianziling Landfill.
Technologies applied or improved
For the sanitary landfill, the leachate treatment follows the flowcharts of
1) leachate collection – regulating ponds – aerobic SBR – activated sludge process, or
2) leachate collection – regulating ponds – aerobic SBT – floatation – ultrafiltration – electrochemical treatment.
Both methods can make the effluent satisfy the standard requirement.
For the bioreactor landfill, the leachate was in-situ treated by recirculation into waste layer and then irrigated to the cover soil. By this way, the effluent can also satisfy the standard requirement. Furthermore, a stable methanogenesis of landfilled waste could be started more quickly, less inhibited by VFAs.
Social target groups involved
- Governmental organizations responsible for the planning, construction, operation and strategy-making of waste management.
- Enterprises related to waste facilities, BOT investigations?
- Academic insitutions
Publications on project results
Shao, L. M., He, P. J.*, Li, G. J. In-situ Nitrogen removal from leachate by bioreactor landfill with limited aeration[J]. Waste Management, on line, DOI 10.1016/j.wasman.2007.02.028.
Zhang, H. H., He, P. J.*, Shao, L. M., Qu, X., Lee, D. J. Minimizing N2O fluxes from full-scale municipal solid waste landfill with properly selected cover layer soils. Journal of Environmental Sciences-China, 2008, in press.
Qu, X., He, P.J.*, Shao, L.M., Lee, D.J., Heavy metals mobility in full-scale bioreactor landfill: Initial stage [J]. Chemosphere, 2008, 70(5): 769-777.
Zheng, Z., He, P. J*., Shao, L. M., Lee, D. J. Phthalic acid esters in dissolved fractions of landfill leachates. Water Research, 2007, 41(20): 4696-4702.
He, P. J.*, Qu, X., Shao, L. M., Li, G. J., Lee, D. J. Leachate pretreatment for enhancing organic matter conversion in landfill bioreactor[J]. Journal of Hazardous Materials, 2007, 142(1-2): 288-296.
He, P. J.*, Xiao, Z., Shao, L. M., Yu, J. Y., Lee, D. J. In-situ distributions and characteristics of heavy metals in full-scale landfill layers[J]. Journal of Hazardous Materials, 2006, B137(3): 1385-1394.
He, P. J.*, Shao, L. M., Guo, H. D., Li, G. J., Lee, D. J.. Nitrogen removal from recycled landfill leachate by ex-situ nitrification and in-situ denitrification process[J]. Waste Management, 2006, 26(8): 838-845.
Shao, L. M., He, P. J.*, Xue, J. F., Li, G. J. Electrolytic degradation of biorefractory organics and ammonia in leachate from bioreactor landfill[J]. Water Science & Technology, 2006, 53(11): 143-150.
He, P. J.*, Xue, J. F., Shao, L. M., Li, G. J., Lee, D. J. Dissolved organic matter (DOM) in recycled leachate of bioreactor landfill[J]. Water Research, 2006, 40(7): 1465-1473.
[He, P. J.*, Qu, X., Shao, L. M., Lee, D. J. Landfill leachate treatment in assisted landfill bioreactor [J]. Journal of Environmental Sciences-China, 2006, 18(1):176-179.
He, P. J.*, Shao, L. M., Qu, X., Li, G. J., Lee, D. J. Effects of feed solutions on refuse hydrolysis and landfill leachate characteristics[J]. Chemosphere, 2005, 59(6): 837-844.
He, P. J.*, Shao, L. M., Guo, H. D., Li, G. J., Lee, D. J. Nitrogen removal from landfill leachate using single or combined processes[J]. Environmental Technology, 2005, 26(4): 373-380.
Shao, L. M., He, P. J.*, Zhang, H., Yu, X. H., Li, G. J. Methanogenesis acceleration of fresh landfilled waste by micro-aeration[J]. Journal of Environmental Sciences-China, 2005, 17(3): 371-374.
Guo, H. D., He, P. J.*, Shao, L. M., Li, G. J. Removal of high concentrated ammonia nitrogen from landfill leachate by landfilled waste layer[J]. Journal of Environmental Sciences-China, 2004, 16(5): 802-807.
* Corresponding author: HE PJ (solidwaste@mail.tongji.edu.cn)
