Macrophytes perform significantly in water purification and bioremediation. Due to lack of effect ive use
technology, macrophytes cannot be promptly harvested and many of them decay and pollute wetland
water. Therefore, to seek a recycling and commercial ut ilization of macrophytes becomes the current
urgent need of technique of wetland bioremediation.
Biomass energy represents approximately 14% o f world total energy consumption, a little higher than
coal (12%) and similar to those of electricity (14%) and gas (15%) [1]. Proportion of b iomass energy in
different countries has big distinction ranging from 2% to 90%. With the aggravation of energy crisis,
biomass energy has received more attention as a renewable energy which is also CO2 neutral [2].
As to biomass energy, domestic and foreign scientists have done some research focusing on three
aspects that include the environmental impact, biomass resources and biomass conversion technology [3].
So far, the development and utilizat ion of biomass as fuel mainly concentrate on three points: (1) Biomass
can derive liquid fuels such as biodiesel from rapeseed, sunflower, soybean, palms and seaweed [4, 5].
Also ethanol [6], methanol [7] and furan [8] can be achieved from lignocellulosic biomass. (2) Biomass
can derive combustible gas. Mixed biomass waste has methane potential [9] and by an augmented two- or
three-stage anaerobic fermentation process can cornstalks produce hydrogen [10]. (3) Biomass can derive
briquetting [11]. Rice husk, wood residues and coffee husk are identified as promising agro -residues for
briquetting in the short term [12]. Extensive applications of the former two methods are restricted by high
cost and complex technology. But the third method attracts more concern as it can provide a way to solve
environmental p roblems as well as posses the ability to produce alternative fuel. The techniques of
biomass compression consist of hot pressure molding, wet pressure molding and carbonizat ion molding.
Although after decades of theoretical research and engineering pract ice, problems with heavy wear and
big power consumption are still not resolved. Serving as a near-term, low-risk, low-cost, sustainable,
renewable energy, biomass and coal can be molded into briquetting under normal temperature and lower
pressure. Also, biomass-coal co-combustion promises reduction in effective CO2 emissions, reduction in
SOx and often NOx emissions, and several societal benefits [13]. As a result, briquetting made of coal and
biomass is an effective technique for biomass use. This article is to study the best proportion of binder,
combustion agents and the addition of coal in order to obtain the ideal biomass briquetting which help
resolve the problems with heavy wear and big power consumption.