In the end, two compounds common in wastewater, malic acid as a carbon source and sodium glutamate as a nitrogen source, produced the most hydrogen while minimizing carbon dioxide emissions.
最后，废水中常见的两种化合物，作为碳源的苹果酸和作为氮源的谷氨酸钠，产生了最多的氢，同时最大限度地减少了二氧化碳的排放。