Csmc Technologies Fab2 Co., Ltd.

Suzhou University of Science and Technology

Yue Chen

Yang Pan

Guoding Dai

Xiaohui Ma

Hui Han

Renyue Ma

Xingyu Zhang

Yong Hang

Min Ni

A process for enriching phosphorus and recovering vivianite by a biofilm method includes the following steps: 1) an aerobic phosphorus absorption stage; 2) an anaerobic phosphorus release stage; 3) a cyclic enrichment stage; 4) a seed crystal forming stage; and 5) a crystal forming stage. Phosphorus is enriched by the biofilm method and recovered with vivianite as a recovery product, which solves the problem of phosphorus removal from municipal sewage and improves the economic value; by preparing high dissolved oxygen at the aerobic stage, a high-concentration phosphorus recovery solution can be obtained with a relatively low carbon-phosphorus ratio and relatively high enrichment times, and the consumption of carbon sources can be reduced; since the oxidation-reduction potential is controlled to be less than −100 mv by the biofilm method at the anaerobic phosphorus release stage, the oxidation-reduction potential does not need to be adjusted again during the recovery of vivianite.

Process for enriching phosphorus and recovering blue iron ore by using biofilm method

A high-voltage heavy-current drive circuit applied in a power factor corrector, comprising a current mirroring circuit (), a level shift circuit (), a high-voltage pre-modulation circuit (), a dead time control circuit () and a heavy-current output stage (); the heavy-current output stage adopts a Darlington output stage structure to increase the maximum operating frequency of the drive circuit. The stabilized breakdown voltage characteristic of a voltage stabilizing diode is utilized to ensure the drive circuit operating within a safe voltage range. Adding dead time control into the level shift circuit not only prevents the momentary heavy-current from a power supply to the ground during the level conversion process, but also reduces the static power consumption of the drive circuit.

High-voltage heavy-current drive circuit applied in power factor corrector

Growing community of inventors

Jiangsu, China

Yue Chen