Composite biological filter for treating high algae-laden and high ammonia-nitrogen raw water and application method thereof

• Main Authors: GUO CAIRONG, ZHU LIANG, WANG SHAFEI, XU XIANGYANG, YANG GUANGFENG, ZHANG ZHIMING, XIA TIAN
• Format: Patent
• Language: English
• Published: 07.10.2015
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a composite biological filter for treating high algae-laden and high ammonia-nitrogen raw water and an application method thereof. An overflow pipe, a water inlet unit, a sampling opening, a carrier filling area, a water outlet unit and an aerating device are arranged on a composite biological filter body unit from top to bottom in sequence, and suspended spherical biological filter materials, zeolite filter materials, granular active carbon filter materials and a supporting layer are arranged in the carrier filling area from top to bottom in a graded mode. The composite biological filter has the advantages that the spherical biological filter materials can effectively enrich a biological film to remove nitrogen elements and other pollutants in polluted raw materials, algae can be synchronously removed through adsorption, mechanical entrapment and other functions of zeolite and activated carbon, the head loss of an aerating filter can be effectively reduced through a special composite filter material structure, and the back flush frequency is lowered. Meanwhile, the aerating mode, hydraulic retention time and other technological parameters are optimized, and fast biofilm culturing decontamination of the spherical biological filter materials and efficient and low-consumption stable running of a system are achieved.