| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide methane fermentation water treatment equipment which supplies waste water of a stable pH and temperature to anaerobic waste water treatment equipment and is capable of smoothly circulating the waste water within the anaerobic waste water treatment system. SOLUTION: This anaerobic waste water treatment system has a pH control vessel 2 to which the waste water is supplied from a waste water supply pipe, the anaerobic waste water treatment equipment 4 which is connected across a treatment pipe 3 to the pH control vessel 2 and a treated water vessel 7 which is connected to the anaerobic waste water treatment equipment 4, is connected through a return pipe 6 to the pH control vessel 2 and is arranged above the pH control vessel 2. The treatment pipe 3 is fitted with a feed water pump 8 and a circulating pump 9 in parallel. The waste water in the treated water vessel 7 is returned through the return pipe by self-weight. The feed water pump 8 is controlled into contact with the supply rate of the waste water from the waste water supply pipe 1. The circulating pump 9 is so controlled as to attain the flow rate lower than the maximum flow rate flowing in the return pipe 6.</p> |
