The main feature of these total technologies is that we can constitute the optimum treatment scheme fitting to the property of wastes, amount of wastes and energy requirement. For high moisture content wastes or biomass resources, high pressure steam process (MMCS) for crush, dry and deodorize wastes to produce high quality fertilizer of fuel is most appropriate. For dry or semi-dry solid wastes, the STAR-MEET system can be applied to produce low-BTU gases for power generation using duel fueled diesel engines of Stirling engines, and the REPRES and HyPR-MEET systems can be applied to produce hydrogen rich medium-BTU gas. For waste plastics and oils, liquefaction technology is best fit to produce light oil or kerosene equivalent fuel oils. These total technologies are completely different from the existent waste treatment technologies based on land-filling or incineration, and are expected to disseminate all over the world in the near future.

Biomass had been attracted public attention as eco-friendly resource which not increases the greenhouse gas like carbon dioxide. In this study, it had been collected pyrolytic products such as bio-oil, char and pyrolytic gas from various biomass in a fluidized bed reactor which is one of the fast pyrolysis processes. To understand the characteristics of biomass pyrolysis, the variation of products yield and chemical composition was determined with various operating parameters like temperature, gas velocity($U_{0}/U_{mf}$) and bed height(L/D). In the optimum operating conditions, gas yield and water content was the lowest and concentration of guaiacols and syringols were the highest. The maximum yields of bio-oil was from 55% to 58% at $400^{\circ}C$.

폐플라스틱으로부터 만든 재생연료유의 연료특성 향상을 위하여 수첨 열분해 실험을 수행하였다. 주요 실험인자로 반응온도($300^{\circ}C{\sim}700^{\circ}C$), 촉매(알루미나-실리카, 활성탄, 제올라이트)를 선정하였고 이들이 액상 생성물의 인화점, 동점도, 고형물 함량에 미치는 영향을 조사하였다. $300^{\circ}C{\sim}400^{\circ}C$ 온도에서 수첨 열분해는 재생연료유의 연료특성을 개선하는 효과가 있었다. $500^{\circ}C$ 이상 온도에서는 열분해반응이 활발하게 진행되어 생성물의 인화점이 급격히 낮아졌다. 촉매를 도입하여 생성물의 인화점을 높일 수 있었는데 이는 촉매가 수첨반응을 활성화하였기 때문으로 사료된다. 동점도는 무촉매 반응에서 가장 낮은 값을, 제올라이트 촉매 반응에서 가장 높은 값을 보였다. 고형물 제거율은 모든 반응조건에서 70 % 이상이었다. 조사한 촉매들 중에서 활성탄이 재생연료유의 수첨 열분해 반응에 가장 안정적이며 높은 활성을 보였다.