Cradle to Gate
Identity ID
5ecbe004-e1a0-4a93-ac24-99b415c3dffb
Waste treatment
Associated ID
f775b1c5-503d-4b19-890c-fba3135cb966
Included activities starts
Included activities ends
Description
This dataset represents the average treatment of 'municipal solid waste, municipal incineration, unspecified' in the northwestern region of China, which includes Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang. Waste treatment activities are based on an average urban/public waste mixture and are not suitable for single specific waste types such as plastic, paper, cardboard, etc. If your waste is a specific waste mixture, please account for the corresponding waste separately. Each kg of this waste generates 0.205 kg of slag and 0.05 kg of fly ash, after precious metal recovery from boiler slag, is landfilled and solidified with cement at a ratio of 1:1. The average thermal efficiency of waste heat electricity generation is taken as 22%; in the waste heat heating process, no conversion between different forms of heat and energy occurs, resulting in higher thermal efficiency, with an average value of 64%. By integrating the thermal efficiencies of both waste heat electricity generation and direct heat supply, 15% of the heat generated from waste incineration is used for electricity generation, while 56% is utilized for direct heating.
This dataset is calculated based on the Urban and Rural Construction Statistical Yearbook--Provincial-level Data on Urban Municipal Sanitation and Environmental Conditions.
Activity Description
After waste enters the incineration plant, it is first piled and stored, during which leachate is generated due to the high moisture content of the waste. Subsequently, the stored waste is fed into the incinerator for combustion. The flue gas produced during incineration is treated through flue gas purification systems. The resulting solid residues include bottom ash and fly ash, with bottom ash deposited at the bottom of the incinerator and fly ash carried away with the flue gas. The heat generated from incineration is utilized for power generation or heating, achieving resource recovery. The electricity produced from waste heat recovery can be sold externally or reused within the incineration plant.
Process Description
"Municipal solid waste" is primarily generated from a wide range of activities across many different sectors. "Municipal solid waste" includes the following components: kitchen waste, paper, rubber, textiles (fibers), wood and bamboo, ashes and soil, bricks, tiles and ceramics, glass, metals, and potentially other fractions. This by-product (recyclable or waste) arises from common transformation activities and can therefore be considered for modeling waste outputs of similar composition. In the HiQ database, treatment methods for this by-product include: landfilling – sanitary landfill, municipal incineration. Additionally, this by-product is used in the following process: clinker production.
Time period
2021
2026
Geography
China,Northwest China
Geography comment
The Northwest region includes: Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang; it is formed by aggregating provincial-level data from this region.
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
In China, 90% of waste-to-energy power plants use mechanical grate incinerators for their furnaces, with waste heat boilers configured in vertical, horizontal, or II-type arrangements, primarily adopting the horizontal layout. These facilities are typically equipped with the following systems: in-furnace denitrification system, semi-dry flue gas desulfurization tower, dry powder injection, activated carbon injection adsorption system, and baghouse dust collector. The in-furnace denitrification systems mainly employ selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR) technologies.