Sewage treatment device capable of recovering methane and ammonia simultaneously

Abstract

A sewage treatment device capable of recovering methane and ammonia simultaneously comprises an up-flow type anaerobic sludge bed unit and a baffle plate ion exchange unit, wherein the up-flow type anaerobic sludge bed unit and the baffle plate ion exchange unit are connected sequentially; the up-flow type anaerobic sludge bed unit comprises a reaction zone, a three-phase separator, a settling zone and a gas collecting chamber from bottom to top; a water inlet pipe is arranged at the bottom of the left side of the reaction zone, and a sludge discharge port is formed in the bottom of the middle; a gas outlet is formed in the gas collecting chamber; the baffle plate ion exchange unit is divided into multiple separate compartments arranged horizontally by multiple vertical baffle plates; the structure that a falling zone in the front and a rising zone at the back are connected in series alternately is formed in each separate compartment by the aid of the baffle plate; the rising zones of the baffle plate ion exchange unit are filled with zeolite ion exchangers. The device is compact in structure, anaerobic methane production and subsequent zeolite ion exchanging are combined, and energy and nitrogen elements are recovered while sewage is treated.

Description

technical field [0001] The invention relates to a sewage treatment device which simultaneously realizes biogas and ammonia recovery. Background technique [0002] Anaerobic biological treatment technology can effectively treat domestic sewage, convert the organic matter in it into methane gas, and realize the effective recovery of biogas biomass energy. However, the anaerobic treatment of domestic sewage can convert the organic nitrogen in the sewage into ammonia nitrogen, resulting in a high concentration of ammonia nitrogen in the effluent, and the subsequent denitrification treatment is urgently needed. The existing denitrification technology basically converts ammonia nitrogen into nitrogen gas. Although the discharge can meet the emission standards, it also leads to the waste of nitrogen nutrients. [0003] If the ion exchange technology can be combined with anaerobic biological treatment, the nitrogen in the sewage will be converted into ammonia ions through anaerobic...

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Problems solved by technology

[0007] In order to overcome the problems of complex structure, low treatment efficiency and large energy consumption in the existing process, the present invention provides a kind of simple structure, low energy consumption, high nitrogen recovery rate, and can recover a large amount of nitrogen at the source of sewage and realize biogas at the same time Sewage treatment plant with ammonia recovery

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