Processing system and processing method for purifying sewerage sludge filtrate

A purification treatment and sewage sludge technology, applied in biological water/sewage treatment, degassed water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems that microorganisms cannot purify sewage and prolong sewage purification time

Inactive Publication Date: 2009-11-25
GUANGDONG LVYOU ENVIRONMENTAL PROTECTION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is to prolong the sewage purification time. During the anaerobic period, the activated sludge organisms in the SBR tank are

Method used

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  • Processing system and processing method for purifying sewerage sludge filtrate
  • Processing system and processing method for purifying sewerage sludge filtrate
  • Processing system and processing method for purifying sewerage sludge filtrate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] Such as figure 1 As shown, the sewage sludge filtrate purification treatment system includes successively connected sedimentation tanks, multi-stage stripping towers, adjustment tanks, sequential batch activated sludge reaction tanks, ceramsite filter tanks, hollow ultrafiltration treatment devices, and Aerators connected to the sedimentation tank, multi-stage stripping tower, conditioning tank, and sequential batch activated sludge reaction tank, the sludge tank connected to the sedimentation tank, and the decanter installed in the sequential batch activated sludge reaction tank , The multi-stage stripping tower includes a blower.

[0038] Such as figure 2 As shown, the hollow ultrafiltration treatment device includes two or more storage tubes 1, hollow fiber membranes (not shown) integrated in the storage tubes 1, and each storage tube 1 is provided with a filtrate inlet 2 Sewage outlet 5, purified water outlets 3, 4, filtrate inlet 2 of storage pipe 1...

Example Embodiment

[0040] Example 2

[0041] The sedimentation tank is 15 meters long, 3 meters wide, effective depth is 2 meters, and the residence time is 2 hours. After the filtrate water is aerated and settled in the sedimentation tank, most of the sludge particles passing through the filter holes of the filter cloth are removed from the water at the beginning of the filter press. After sedimentation, the sludge pump is discharged into the sludge tank; the average effluent quality of the sedimentation tank: chemical oxygen demand is about 1170mg·L -1 , The biological oxygen demand is 570mg·L -1 , Suspended solids is 160mg·L -1 , The removal rate of total phosphorus and ammonia nitrogen is not obvious.

[0042] The effluent from the sedimentation tank is transported by the sewage pump to the air stripping tower to remove ammonia and nitrogen. The pH value is adjusted to about 10 with lime. The sewage enters from the top and sprays downwards, collides with the packing to form fine droplets, and th...

Example Embodiment

[0047] Example 3

[0048] The difference from Example 2 is:

[0049] The residence time of the filtrate in the sedimentation tank is 1.5 hours. Average water quality of sedimentation tank: chemical oxygen demand is about 950mg·L -1 , The biological oxygen demand is 494mg·L -1 , Suspended matter is 150mg·L -1 , The removal rate of total phosphorus and ammonia nitrogen is not obvious.

[0050] Adjust the pH to about 9.5 with lime. The residence time in the stripping tower is 1 hour, the water temperature is heated to 60℃, and the gas-water ratio is 2000~2500m 3 / m 3 , The ammonia nitrogen removal rate of the stripping tower can reach 48%, and the average ammonia nitrogen effluent concentration is about 20.1mg·L -1 .

[0051] The pH in the regulating tank is adjusted to a value of 6.5; the residence time in the regulating tank is 3 hours; the average chemical oxygen demand of the effluent from the regulating tank is 800mg·L -1 , The biological oxygen demand is 420mg·L -1 , Ammonia ni...

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Abstract

A processing system and a processing method for purifying a sewerage sludge filtrate includes (1) airing and precipitating the filtrate in a sedimentation basin; (2) conveying the filtrate after the precipitation to an air stripping tower to remove the ammonia nitrogen; (3) conveying the filtrate from the air stripping tower to a balancing tank to regulate a pH value; (4) conveying the filtrate to a sequencing batch activated sludge reaction tank to implement an aerobic microbial treatment firstly and an anaerobic microorganism treatment secondly; (5) filtering, absorbing and purifying the filtrate by a haydite filter pot discharged from a draining device; (6) implementing a film treatment to the filtrate after the filtration of the haydite filter pot by a hollow hyperfiltration device. The advantage of the invention is that the filtrate may reach a firstlevel B standard of the sewage discharge standard > after the above technical scheme, and the system has a high efficiency.

Description

technical field [0001] The invention relates to a filtrate purification treatment system and treatment method after dehydration of sewage sludge, in particular to a filtrate purification treatment system and treatment method after urban domestic sewage sludge press filtration dehydration. Background technique [0002] The filtrate after dehydration of urban domestic sewage sludge still contains high chemical oxygen demand (CODcr), biological oxygen demand (BOD 5 ), suspended solids (SS), total phosphorus (TP), ammonia nitrogen content (NH 3 -N), some sewage also contains pigments. [0003] Table 1 is a comparison table of the filtrate quality and domestic sewage discharge standard "GB 18918-2002" Class B standard: [0004] Table 1 [0005] [0006] It can be seen from the comparison in Table 1 that the filtrate after dehydration of sewage sludge cannot be discharged directly, and must be purified to meet the discharge standard before it can be discharged or used for ir...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/20C02F3/12C02F3/30C02F1/44C02F1/28C02F1/66B01D21/02
CPCY02W10/10
Inventor 古耀坤曾智权
Owner GUANGDONG LVYOU ENVIRONMENTAL PROTECTION EQUIP CO LTD
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