Technical Visit

Hangzhou Tianziling Landfill – Project  I, which was designed in 1987, is the first municipal solid waste (MSW)  sanitary landfill in China before the enactment of the Technical Code for Municipal  Solid Waste Sanitary Landfill (CJJ17-88). The top elevation of the waste dam,  which was a roller compacted rockfill dam, was 65m. MSW was filled up behind  the waste dam with a slope inclination of 1:3. The final height of the waste  body and the storage capacity of landfill were designed to 165m and 6×106m3,  respectively. The landfill was designed to service for 13 years, and it was formally  put into operation in April 1991 and expired in 2004. In order to prevent the leachate  generated from the buried MSW from polluting the downstream groundwater in the  landfill area, vertical seepage control measures, mainly grouting  curtains, were designed underneath the interception dam and at the lower side  of the regulation pool. 10-year groundwater monitoring results showed that the  downstream groundwater was not significantly contaminated by leachate from the  landfill, and the seepage control was proven effective to an extent. The  leachate was treated by a low oxygen-aerobic activated sludge process. This  project has been awarded as a demonstration project and excellent project by  the Ministry of Construction, the State Environmental Protection Bureau and the  State Science and Technology Commission, and promoted throughout the country.

Hangzhou Tianziling Landfill - Project  II was constructed  on the basis of the success of  Project I  and the advanced technology at home and abraod. This project started in  December 2003, and the first phase was completed in December 2006, which was  located 440 meters west of the downstream of Project I and covered an area of  about 1700 acres with a total storage capacity of 2.2×107m3.. The first phase of Project II was designed to absorb 24.05 million  tons of MSW at a daily disposal rate of 1940~4000 tons and service for 24.5  years.. The main constructions consisted of management area, sewage treatment  plant, waste dam, reservoir seepage prevention system, platform road system and  other ancillary facilities, etc. Advanced computer measurement and control  system network was implemented in the management area to monitor and manage the  whole operation process to  achieve  domain management, authority management and resource sharing; the reservoir  seepage prevention system adopted international leading vertical anti-seepage technology  combined with the vertical grouting curtain system and the horizontal composite  barrier system made of a double-layer high-density polyethylene (HDPE)  geomembrane and a geosynthetic clay liner (GCL) ; the landfill  process included metering, dumping, leveling,  compaction, disinfection, and covering soils; and the sewage treatment plant undertook  the disposal of sewage from  both projects, and the designed daily  treatment rate was 1500 tons by combinations of two-stage pressurized  biochemistry and air flotation. The effluent quality was monitored online, and it  should satisfy the third-level criteria in the Standard for Pollution Control  on the Landfill Site of Municipal Solid Waste (GB 16889-2008) before the  effluent was introduced to the municipal pipe network.  

Solid waste disposal Tour:

Tourist route: Tourist centre →15 Eco-park →24 Kitchen  waste disposal project →25 Food waste disposal project →23 Landfill gas power  plant →22 Landfill leachate treatment plant →26 Laboratory center for construction  waste recycling →9 Smart operation command center