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7
th
International Conference on
Recycling and Waste Management
October 03-04, 2019 | Melbourne, Australia
Journal of Environmental Waste Management and Recycling | Volume: 02
Techno-environmental feasibility of wood waste derived fuel for cement production
Michael Yue Kwong Wong
The Hong Kong Polytechnic University, Hong Kong
T
ransforming waste into resources amongst industrial
symbiosis networks towards circular economy has
been key scientific interests. Not only for it to reduce the
environmental consequences of societal waste burden, but
it also improves materials efficiency and conserve natural
resources. The co-processing of wood waste derived fuel
(WDF) as an alternative fuel in cement production would
minimize the consumption of fossil fuels and reduces the
quantity of wood waste to be disposed at landfills. The
techno-feasibility of consuming post-consumer wood
derived fuel (WDF) in practical co-processing application
is rarely reported. A trial burn of WDF in supplementing
20% of coal was successfully conducted in a cement plant
in Hong Kong to evaluate the techno-environmental
feasibility of the engineered WDF. The pelletized wood
produced from post-consumer wood waste, which
was generated mainly from waste wood pallets of the
local logistic industry, was found to be suitable to be
transformed into an engineered fuel for energy recovery
in the cement plants, based on its physical and chemical
characteristics. The stack continuous emission parameters
during the WDF trial burn process complied with the
statutory emission standard while the periodic sampling of
particulates, dioxin, mercury, cadmium and thallium, and
other heavy metals were about 60%, 2%, 21%, 6% and 7%
of the statutory emission standard, regulated for baseline
coal-firing operation. No adverse impact on the cement
clinker production process and on the quality of the clinker
produced was observed. Based on LCA, compared to
using coal as the only fuel, about 16% reduction of GHGs
emission was achieved when consuming WDF as a co-fuel
(20%) at the precalciner. It can be concluded from the
findings that WDF could be utilized as an alternative fuel
for partial replacements of coal, as the co-processing met
the specific process parameters and complied with the
regulatory limits.
Speaker Biography
Michael Yue Kwong Wong conducted the trial burn of wood waste
derived fuel (WDF) at the Green Island Cement Plant in Hong Kong
in May 2017. He designed a WDF feeder process and completed the
engineering, procurement and construction of project within a tight
schedule of 6 months. He commissioned the equipment factory
and site acceptance testes, the biomass logistics, the actual 24/7
pilot plant operation, the fuel and emission sampling and testing,
as well as the writing of the final project report. In which his works
has proven the feasibility of using WDF as an alternative fuel (AF) in
cement plants leading to the subsequent licensing exercise for the
commercial use of WDF and other AFs in the cement plant. His role
as a Process Superintendent in recent years is to improve the plant
process and to explore the opportunities of efficient use of alternative
fuel and raw material (AFR) recycling. Prior to that he worked as a
Project Manager under a corporate venture capital environment
involved in the environmental business development covering MSW
co-combustion and Hydrogen energy and hybrid mobility. He earned
his undergraduate degree in Chemical Engineering from the University
of Alberta and sub-degree in Industrial Occupation Safety from the
Hong Kong Polytechnic University, and pursued and received his post-
graduate degrees in Environmental Management from the University of
Hong Kong and Finance from the Chinese University of Hong Kong. His
early exposure on the application of AFR involving the recycling of Coal
Ash, FGD Gypsum and a chemical waste MARPOL derived fuel (MDF)
dates back to 1993-1996 with his first job as a Process Engineer.
e:
michaelw@gich.com.hk