Harbin Institute of Technology

Defeng Xing

Nanqi Ren

Jie Ding

Yang Yang

Bingfeng Liu

Shanshan Yang

Zhen Li

Shengqiang Fan

Hanjun Sun

Guojun Xie

Najiaowa Yu

Wei Li

A high-load organic wastewater dark fermentation biohydrogen production device and a hydrogen production method are provided. An exhaust port of the production device is communicated with a gas collection region through a gas pipe; a return inlet is arranged at a bottom; a baffle plate is arranged in a two-phase separation device; the baffle plate has a helical shape that makes influent water form a helical centripetal water flow path; one end of an inert gas communicating pipe is connected with an air hole at a bottom of the gas collection region; the other end of the inert gas communicating pipe is communicated with an air intake disc; the inert gas communicating pipe is provided with a connecting hole and an air pump; and the gas collection region is connected with a gas buffer tank and a hydrogen storage tank in sequence. A two-phase separation unit is also provided.

High-load organic wastewater dark fermentation biohydrogen production device and hydrogen production method

The present invention discloses a novel membrane aerated anaerobic granular sludge reactor, belonging to the technical field of sewage treatment. The reactor solves the problems of low solubility of gas substances in an aqueous solution, large gas-liquid mass transfer resistance and low mass transfer rate. The top of a reactor body is provided with a water outlet, and the middle side wall of the reactor body is provided with a middle water outlet; the middle water outlet of the reactor body is connected with an water inlet of a membrane module; an water outlet of the membrane module is connected with a bottom water inlet of the reactor body through a circulating pump, a water inlet is connected with the bottom water inlet of the reactor body through a feed pump, a high pressure or pressurized gas cylinder outputs high pressure or pressurized gas to the membrane module, and a gas pressure regulating valve is arranged between the high pressure or pressurized gas cylinder and the membrane module. The novel membrane aerated anaerobic granular sludge reactor improves the content of a gas substrate therein, and shortens the formation time of granular sludge. The efficient nitrogen removal and greenhouse gas emission reduction method has higher nitrate and ammonia removal rates and a higher dissolved methane removal rate within a shorter time.

Membrane aerated anaerobic granular sludge reactor with efficient nitrogen removal and greenhouse gas mitigation

The present invention provides a method for fermentative hydrogen production under limited aerobic conditions by utilizing the respiratory interaction between a strictly anaerobic hydrogen producing bacterium,YUAN-3, and a facultative anaerobic bacterium,PAO1. The two bacteria are co-cultured to produce hydrogen gas in a culture medium without any anaerobic treatment. Sucrose, lactose or glucose are used as the carbon source for the co-culture which can promote the growth ofYUAN-3 and reduce substrate competition between two bacteria. L-cysteine is added to increase the hydrogen yield and the production rate. Using 15 g/L glucose and 5 mmol/L L-cysteine, the invented method achieved the hydrogen production yield of 1.11 mol-hydrogen/mol-glucose.

System for hydrogen production under limited aerobic conditions

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Harbin, China

Defeng Xing