Flat plate film sludge concentration and treatment process

A treatment process and sludge concentration technology, applied in water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, biological water/sewage treatment, etc., can solve high maintenance costs, poor economy, and large cost investment and other problems, to achieve the effect of small footprint, save floor space, and reduce work intensity

Inactive Publication Date: 2007-10-17
TAOPU SEWAGE TRAEATMENT PLANT OF SHANGHAI CHENGTOU SEWAGE TREATMENT +1
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Problems solved by technology

At present, mechanical concentration technology is becoming a substitute for conventional gravity concentration technology, but the cost of mechanical concentration technology including belt thickener and centrifugal thickener is large, the maintenance cost is high, and sometimes the cost of chemicals is required, so in general , although the effect of mechanical concentration technology is very good, but the economy is poor, it is not an ideal method

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  • Flat plate film sludge concentration and treatment process
  • Flat plate film sludge concentration and treatment process

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Embodiment Construction

[0011] 1. Treatment of excess activated sludge

[0012] After the sewage is treated by the primary settling tank and the secondary settling tank, the remaining activated sludge discharged from the secondary settling tank enters the flat membrane concentration tank for concentration treatment. The input sludge concentration of the flat membrane sludge concentration tank: 3g / L, air-water ratio: 40 : 1, hydraulic retention time: 12h, operation mode of concentration treatment: continuous mud feeding and continuous water outlet in one mud discharge cycle; intermittent operation between each operation cycle. Membrane water flux up to 20L / m 2 .h, the water quality of the membrane effluent reaches the standard for reclaimed water reuse, and it can be reused directly, and the final sludge concentration can reach 20g / L. After the sludge treated in the flat membrane concentration tank is mixed with the sludge in the primary sedimentation tank, the solid content of the sludge is close to...

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Abstract

A plate membrane sludge thicking processing technics relates to sludge thicking processing technique in sewage treatment process, which is applicable to thickening treatment of excess activated sludge or mixing sludge obtained from mixing excess activated sludge with primary sludge in sewage treatment process. Moisture of sluge is discharged by means of membrane water in ultrafiltration action of the plate membrane, the water quality get to wastewater reuse standard so can be used as wastewater reuse directly, and sludge can be thickened. The processing technics of the invention has advantages of small floor space, low operating cost, easy to realize automatic control, in municipal sewage treatment plants, the invention adopts plate membrane thickening tank to replace conventional gravity thickening tank, has good social benefit and economic benefit.

Description

technical field [0001] The flat membrane sludge concentration treatment process relates to the sludge concentration treatment technology in the sewage treatment process, and is suitable for the concentration treatment of the remaining activated sludge generated in the sewage treatment or the mixed sludge with the primary sludge. technical background [0002] At present, corresponding to the excess sludge generated in the sewage treatment process, the gravity concentration method is the most commonly used sludge treatment method, and its operating load is generally 50-90kg / m 2 d. The residence time of sludge in the pool is generally greater than 12 hours. At present, it is still one of the main technologies for sludge concentration in urban sewage plants. Although this kind of technological process, equipment structure and operation management are relatively simple, it occupies a large area and has poor sanitation conditions. In addition, due to the anaerobic digestion of s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F11/12
CPCY02W10/10
Inventor 吴志超华娟
Owner TAOPU SEWAGE TRAEATMENT PLANT OF SHANGHAI CHENGTOU SEWAGE TREATMENT
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