S-uasb sludge anaerobic fermentation device coupling pre-anoxic a2o nitrogen and phosphorus removal device and sludge treatment method

Abstract

The invention discloses a front oxygen-lack A2O denitrifying and dephosphorizing device coupled with an S-UASB (Upflow Anaerobic Sludge Blanket) sludge anaerobic fermentation device. The front oxygen-lack A2O denitrifying and dephosphorizing device comprises an SBR (Sequencing Batch Reactor) sludge pretreatment device, a UASB anaerobic treatment device, a water collecting pool, a front oxygen-lackA2O device and a secondary precipitation tank, wherein the SBR sludge pretreatment device comprises an SBR; the UASB anaerobic treatment device comprises an UASB anaerobic reactor; an SBR sludge outlet is connected into a UASB sludge inlet; the SBR is also connected with an agent box; a UASB water outlet is connected into the water collecting pool; the front oxygen-lack A2O device comprises a reaction tank body which is partitioned into a first oxygen-lack area, an anaerobic area, a second oxygen-lack area and an aerobic area; a water outlet connected into the secondary precipitation tank isformed in the upper side wall of the aerobic area. Meanwhile, the invention provides a method for treating sludge. The front oxygen-lack A2O denitrifying and dephosphorizing device and the method fortreating the sludge disclosed by the invention have the beneficial effects that not only is the problem of lower denitrifying and dephosphorizing efficiency caused by lack of a carbon source in the front oxygen-lack A2O device solved, but also the residual sludge produced is effectively treated, the sludge treating and disposing cost is reduced, and the pollution to the environment is reduced.

Description

technical field [0001] The invention belongs to the field of low C / N urban sewage denitrification and dephosphorization and residual sludge treatment, and specifically relates to an anaerobic fermentation device coupled with an S-UASB sludge anaerobic fermentation device. 2 O nitrogen and phosphorus removal device and method for treating sludge. Background technique [0002] The excess sludge is rich in organic substances such as protein and polysaccharides, and it is a sewage treatment plant A 2 O is an important product of the treatment process, and there are problems of difficult disposal and high processing cost. A 2 O biological treatment process also has the problem of carbon source shortage, inability to simultaneously remove nitrogen and phosphorus, and the competition of microorganisms for carbon sources in the process of nitrogen and phosphorus removal. Contents of the invention [0003] The purpose of the present invention is to provide a kind of S-UASB sludg...

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Problems solved by technology

[0002] The excess sludge is rich in organic substances such as protein and polysaccharides, and it is a sewage treatment plant A 2 O is an important product of the treatment process, and there are problems of difficult disposal and high treatment cost

A 2 O biological treatment process also has the problem of carbon source shortage, nitrogen and phosphorus removal can not be achieved at the same time, and microbial competition for carbon source in the process of nitrogen and phosphorus removal

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