Chemical conditioning based deep dewatering method for sludge and deep dewatering conditioning chemical for sludge

• Main Authors: SONG YU, LI YAPAN, LI LINYU
• Format: Patent
• Language: Chinese; English
• Published: 15.02.2019
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a chemical conditioning based deep dewatering method for sludge and a deep dewatering conditioning chemical for the sludge. According to the method, the sludge in a sewage treatment plant is subjected to chemical conditioning based deep dewatering in a chemical conditioning mode of matching of polymeric ferric sulfate with zeolite which are low in cost and convenient to feed. The method comprises specific steps as follows: after the sludge in the sewage treatment plant is concentrated, polymeric ferric sulfate which is 5%-10% of the amount of absolute dry sludge is added firstly, then zeolite which is 5%-10% of the amount of absolute dry sludge is added, the sludge in the sewage treatment plant is subjected to compound conditioning, and after the chemical adding reaction is finished, the sludge which is conditioned well is pumped into an ultrahigh-pressure elastic presser or a diaphragm plate-and-frame filter press for filter-press deep dewatering and water content of a mud cake obtain