To tap the organic waste generated onboard cruise ships is a very promising approach to reduce their adverse impact on the maritime environment. Biogas produced by means of onboard anaerobic digestion offers a complementary energy source for ships’ operation. This report comprises a detailed presentation of the results gained from comprehensive investigations on the gas yield from onboard substrates such as food waste, sewage sludge and screening solids. Each person onboard generates a total average of about 9 kg of organic waste per day. The performed analyses of substrates and anaerobic digestion tests revealed an accumulated methane yield of around 159 L per person per day. The anaerobic co-digestion of sewage sludge and food waste (50:50 VS) emerged as particularly effective and led to an increased biogas yield by 24%, compared to the mono-fermentation. In the best case, onboard biogas production can provide an energetic output of 82 W/P, on average covering 3.3 to 4.1% of the total energy demand of a cruise ship.

利用游轮上产生的有机废物是减少其对海洋环境不利影响的非常有前途的方法。通过船上厌氧消化产生的沼气为船舶的运行提供了补充能源。该报告详细介绍了从对诸如食物垃圾，污水污泥和固体筛分等船上基质产生的气体的综合调查中获得的结果。船上的每个人每天平均总共产生约9千克有机废物。进行的底物分析和厌氧消化测试表明，每人每天累积的甲烷产量约为159L。污水污泥和食物垃圾的厌氧混合消化（50:50 VS）特别有效，并导致沼气产量提高了24％，与单发酵相比。在最好的情况下，船上沼气的产生可提供82 W / P的能量输出，平均可满足游轮总能量需求的3.3％至4.1％。