Accurate adding control method and system for liquid carbon source of constructed wetland

• Main Authors: CHE RAN, PAN BOYA, MOU TIANYU, LYU GANGLIN, SHANG JINGJING, ZHAO SONG, LI WENQUAN, XUE MOXI, YU GUANGZHOU, YANG JUNJIE, ZHANG JINYONG
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a method and a system for accurately adding a liquid carbon source in a constructed wetland. The adding amount of the liquid carbon source is calculated according to the following formula: V = {Q * [5 * (TN inflow-TN standard effluent)-(COD inflow-COD effluent)]/plant carbon source COD equivalent}/rho, TN inflow is the concentration of inflow TN, TN standard effluent is the concentration of standard effluent TN, COD inflow is the concentration of inflow COD, and COD effluent is the concentration of standard effluent COD; the system comprises a liquid carbon source preparation tank, a liquid carbon source adding pipeline, a PLC (programmable logic controller), a computer, a water inlet flowmeter, a water inlet COD (chemical oxygen demand) sensor, a water inlet TN (total nitrogen) sensor, a water outlet TN sensor and a water outlet COD sensor, one end of the liquid carbon source feeding pipeline is connected with the liquid carbon source preparation tank through a peristaltic pump; the