US 12,404,192 B2
High-load organic wastewater dark fermentation biohydrogen production device and hydrogen production method
Jie Ding, Heilongjiang (CN); Nanqi Ren, Heilongjiang (CN); Shanshan Yang, Heilongjiang (CN); Defeng Xing, Heilongjiang (CN); and Hanjun Sun, Heilongjiang (CN)
Assigned to HARBIN INSTITUTE OF TECHNOLOGY, Heilongjiang (CN)
Filed by Harbin Institute of Technology, Heilongjiang (CN)
Filed on Sep. 24, 2024, as Appl. No. 18/894,511.
Claims priority of application No. 202311440308.3 (CN), filed on Nov. 1, 2023.
Prior Publication US 2025/0136485 A1, May 1, 2025
Int. Cl. C02F 3/28 (2023.01); C12M 1/00 (2006.01); C12M 1/107 (2006.01)
CPC C02F 3/286 (2013.01) [C12M 23/36 (2013.01); C12M 27/20 (2013.01); C12M 29/18 (2013.01); C12M 47/10 (2013.01); C02F 2203/002 (2013.01); C02F 2303/10 (2013.01); C12M 21/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A organic wastewater dark fermentation biohydrogen production device, comprising:
a dark fermentation biohydrogen production device (7), a two-phase separation device (12), a gas buffer tank (24) and a hydrogen storage tank (26), wherein;
an organic wastewater is used as a fermentation substrate in the dark fermentation biohydrogen production device (7);
an exhaust port located at a top of the dark fermentation biohydrogen production device (7) is in fluid communication with a gas collection region (22) through a gas collection pipe (8); and
a return inlet is arranged at a bottom of the dark fermentation biohydrogen production device (7);
a water inlet is arranged at a side wall of the two-phase separation device (12);
a first end of a inlet pipe (9) is connected with a liquid outlet of the dark fermentation biohydrogen production device (7), and a second end of the inlet pipe (9) is connected with the water inlet of the two-phase separation device (12);
a baffle plate (10) is arranged in the two-phase separation device (12), wherein the baffle plate (10) is provided with a plurality of ultrasonic generators (10-1), and the baffle plate (10) has a helical shape that makes influent water form a helical centripetal water flow path;
a return outlet (15) is arranged at the center of a bottom plate of the two-phase separation device (12);
the return outlet (15) is fluid communication with the return inlet of the dark fermentation biohydrogen production device (7) through a sludge return pipeline (16);
an air intake disc (13) is arranged below the baffle plate (10);
a connecting pipe (14) located at a top of the two-phase separation device (12) is in fluid communication with the gas collection region (22);
a first end of an inert gas pipe (20) is connected with an air hole at a bottom of the gas collection region (22), wherein a mist catcher (11) is arranged at a bottom of the connecting pipe (14), and a second end of the inert gas pipe (20) is in fluid communication with the air intake disc (13); and the inert gas pipe (20) is provided with a connecting inlet (21) and an air pump (19); and
a hydrogen outlet at a top of the gas collection region (22) is connected with the air inlet of the gas buffer tank (24) through a first air delivery pipe (23), and an air outlet of the gas buffer tank (24) is connected with an inlet of the hydrogen storage tank (26) through a second air delivery pipe.