Low-concentration village and town sewage treatment method

A sewage treatment method and treatment method technology, applied in water/sludge/sewage treatment, multi-stage water treatment, water treatment parameter control, etc., can solve the problems of complex reactor structure, high operating cost, and affecting effluent water quality, etc. Achieve the effect of simple structure, low investment and operating costs, and less equipment

Active Publication Date: 2020-10-09
北京益科赛斯科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned low-concentration domestic sewage aerobic granular sludge treatment methods are all started under high-load conditions, and low-load operation, the granular sludge will have an adaptation transformation stage, some Granular sludge may disintegrate and affect the quality of effluent water, and there are still defects such as complex reactor structure and high operating costs

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Effect test

Embodiment 1

[0041] use figure 1 The device shown is for treating low-concentration village and town sewage, in which the diameter of the columnar reactor is 0.25m, the height is 1m, the effective water depth is 0.75m, and the effective height-to-diameter ratio is 3:1; water is fed from the bottom of the columnar reactor, The operation period is 4 hours, adopting the sequential batch operation mode of water intake-pulse aeration stirring-anaerobic-aerobic-stationary-pulse aeration stirring-stationary-pulse aeration stirring-sedimentation-drainage, water intake 10min, air The fan enters the columnar reactor through the aeration plate at the bottom of the columnar reactor, performs pulse aeration and stirring for 1min, anaerobic for 15min, aerobic for 142-157min, standing for 15min, pulse aeration for 1min, standing for 15min, pulse aeration Stir with air for 1 minute, settle for 15-30 minutes, and drain for 10 minutes; the aeration intensity is 0.13 cm / s; the inoculum sludge is flocculent s...

Embodiment 2

[0043] use figure 1 The device shown is for treating low-concentration village and town sewage, in which the diameter of the columnar reactor is 0.25m, the height is 1m, the effective water depth is 0.75m, and the effective height-to-diameter ratio is 3:1; water is fed from the bottom of the columnar reactor, The operation period is 3 hours, and the sequential batch operation mode of water intake-pulse aeration stirring-anaerobic-aerobic-standstill-pulse aeration stirring-sedimentation-drainage is adopted; half a month before the operation, when the water exchange ratio is less than 50%, The sequence batch operation mode is as follows: water is fed for 10 minutes, air enters the columnar reactor from the fan through the aeration plate at the bottom of the columnar reactor, pulse aeration is performed for 1min, anaerobic for 19min, aerobic for 90-100min, standing for 19min, Pulse aeration and stirring for 1 minute, sedimentation for 25-30 minutes, drainage for 10 minutes; when ...

Embodiment 3

[0045] use figure 2 The device shown treats low-concentration village and town sewage, in which the columnar reactor has a diameter of 4m, a height of 4.5m, an effective water depth of 4m, and an effective height-to-diameter ratio of 1:1; The period is 3 hours, using the sequential batch operation mode of water intake-pulse aeration stirring-anaerobic-aerobic-standstill-pulse aeration stirring-sedimentation-drainage, water intake 15min, air is passed through the bottom of the column reactor by the fan The aeration tray enters the columnar reactor, performs pulse aeration and stirring for 1min, anaerobic for 15min, aerobic for 92-102min, standing for 15min, pulse aeration for 2min, sedimentation for 20-30min, and drainage for 10min; the aeration intensity is 0.17cm / s; The inoculum sludge is flocculent sludge from the aerobic tank of a sewage treatment plant, and the inoculum volume is 5g MLSS / L. Due to the relatively low height and diameter, decanting equipment is used for t...

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Abstract

The invention relates to the technical field of biological sewage treatment, in particular to a low-concentration village and town sewage treatment method. The low-concentration village and town sewage treatment method provided by the invention comprises the following steps: inoculating flocculent sludge into a reactor, culturing aerobic granular sludge by adopting a sequencing batch operation mode of water feeding, pulse aeration stirring, anaerobic treatment, aerobic treatment, standing, pulse aeration stirring, precipitation and drainage, and purifying low-concentration village and town sewage at the same time. By adopting pulse aeration stirring, sludge and sewage can be fully mixed, the problem of non-uniform water distribution is solved, and a complex water distribution structure anda stirring device or a reflux device are saved, so that the reactor is simple in structure, less in equipment and low in investment and operation cost. Pulse aeration stirring is adopted, it can be guaranteed that sludge is in a suspended state all the time in the stirring process, and it is guaranteed that the good effluent quality of the system is always kept from the granular sludge culture stage to the stable operation stage.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a method for treating low-concentration village and town sewage. Background technique [0002] Ordinary activated sludge method is currently the most widely used sewage treatment technology. The activated sludge method has good treatment effect, stable operation, good removal effect on nitrogen and phosphorus, and relatively low treatment cost. However, due to the loose structure and limited settling performance of the flocculent sludge, the biochemical tank and the secondary settling tank have a larger tank capacity, which increases infrastructure investment and floor space. Compared with the ordinary activated sludge method, the aerobic granular sludge technology (AGS technology) has the advantages of biological density, high specific gravity, and fast sedimentation speed, which is conducive to the separation of solid and liquid phases, and can greatly reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/30C02F2301/08C02F2301/043C02F2101/16C02F2209/08Y02W10/10
Inventor 胡清王香莲马林唐一陈彤张桐刘欣
Owner 北京益科赛斯科技有限公司
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