| 摘要 |
<p>PURPOSE:To treat wastewater containing dimethyl disulfide efficiently at low cost by adding hydrogen or a hydrogen donor to a fermentation tank in methane fermentation process in treatment of wastewater containing dimethyl disulfide. CONSTITUTION:Raw water is led to, for example, a raw material receiving tank 2 having a mixer 1. High polymer such as polypeptone supposed to evolve hydrogen in decomposition process is supplied from a high polymer component storage tank 3 by a supplying pump 4. The raw water is supplied to a fermentation tank 6 (a reactor) by a supplying pump 5 and methane fermentation is carried out. Sludge is separated in a separation tank 7 and the separated sludge is returned to the fermentation tank 6 by a circulating pump 8. In this way, wastewater like paper pulp wastewater containing mainly low molecular components such as methanol and also dimethyl disulfide is treated for decomposing dimethyl disulfide to methylmercaptane by methane fermentation efficiently at low cost.</p> |
