Device and method for synchronous sludge reduction of high-concentration nitrate wastewater treated by pulse-feeding integrated padeam process

Abstract

The invention discloses a pulse-feeding integrated PADEAM process for treating high-concentration nitrate wastewater and a device and method for synchronous sludge reduction. Sequencing batch SBR reactors are used to inoculate denitrification sludge and anammox sludge, and the remaining sludge is pulsed into the reactor, and the intermittent anaerobic operation mode is adopted to use short-chain sludge produced by sludge hydrolysis and fermentation. As a carbon source for denitrification, fatty acids induce short-term denitrification with high nitrite accumulation, convert high-concentration nitrate into nitrite, provide substrates for anaerobic ammonium oxidation, and simultaneously remove ammonia nitrogen released during sludge fermentation. The invention can effectively solve the problems of large carbon source consumption, unstable denitrification efficiency, and excess ammonia nitrogen produced in the process of excess sludge disposal in the process of treating high-concentration nitrate wastewater by the traditional biological denitrification method, which will save organic carbon sources and reduce pollution. Sludge production, while improving denitrification efficiency, realizing economical and efficient denitrification of high-concentration nitrate wastewater and reduction of excess sludge and resource utilization.

Description

Technical field: [0001] The invention relates to an integrated short-range denitrification coupled anaerobic ammonium oxidation (PDAMOX) process for treating high-concentration nitrate wastewater and synchronous sludge reduction, and belongs to the field of sewage biological treatment. Background technique [0002] With the increasingly serious problem of eutrophication in my country's water bodies and the improvement of sewage discharge standards, the removal of nitrogen has become a key issue in the field of water treatment. Efficient treatment of high-concentration nitrate-containing wastewater in industrial production is an important measure to control inorganic nitrogen pollution in water bodies. At present, the methods for removing nitrate in water mainly include chemical reduction, reverse osmosis, electrodialysis, ion exchange, and biological denitrification. Chemical reduction can be divided into active metal reduction and catalytic reduction. The former uses iron...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the process of treating high-concentration nitrate wastewater with traditional denitrification technology: 1) To achieve high nitrate removal efficiency, a large amount of external carbon source is consumed as an electron donor for denitrification, which increases the energy consumption and cost of operation; 2) A large amount of excess sludge is produced, and its treatment and disposal process may cause secondary pollution, which does not meet the principles of clean and environmentally friendly treatment; 3) Higher concentration of nitrate may lead to higher nitrite accumulation during the reduction process, Affect microbial activity and denitrification efficiency; therefore, economical, efficient and environmentally friendly new nitrate wastewater treatment technology is an urgent need in the field of wastewater denitrification treatment

However, this process can only use ammonia nitrogen and nitrite as substrates, and cannot be directly applied to the treatment of nitrate wastewater

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