Process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation

Abstract

The invention provides a process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation, which belongs to the technical field of sewage biological treatment. The process comprises an untreated water tank, a sequencing batch reactor (SBR) for removing organic matters, a first regulating water tank, a half shortcut nitrification SBR, a second regulating water tank and an autotrophic denitrification upflow anaerobic sludge blanket (UASB) reactor sequentially connected in series. Sludge is separated according to sludge age, which avoids an influence of rapid propagation of heterotrophic bacteria to autotrophic denitrification flora; and a nitrification system adopts half shortcut nitrification, which stably maintains shortcut more easily, ensures the nitrosification rate of the nitrification system, and provides guarantee for denitrification stability of the system. The anaerobic ammonium oxidation technique is applied to deep denitrification treatment of domestic sewage, which reduces the oxygen consumption by 60% compared with the conventional denitrification method, is free of additional carbon sources and neutralizers, and realizes high-efficiency low-energy consumption municipal sewage treatment.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a semi-short-path nitrification / anaerobic ammonium oxidation process and method for denitrification and dephosphorization of urban sewage. Background technique [0002] Energy is a strategic economic resource. With the rapid development of my country's economy, the demand for energy is increasing day by day. Urban sewage treatment is one of the energy-intensive industries. Electricity accounts for more than one-third of the operating costs of conventional urban sewage treatment plants. The power consumption of aeration in the sewage biological treatment system accounts for 40%-50% of the power consumption of the whole sewage treatment plant. In recent years, sewage treatment discharge standards have become increasingly stringent, and with the improvement of treatment requirements, the energy consumption of sewage treatment process has also increased. [000...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a process and method for denitrification and phosphorus removal of semi-short-range nitrification / anammox urban sewage, and adopt anaerobic ammonium oxidation technology to solve the traditional process of high aeration volume, low treatment efficiency, and need With the addition of carbon sources and high operating costs, it has realized urban sewage treatment with high efficiency and low energy consumption

Images