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Quick culture method for activated sludge during process of viscose waste water by SBR (Styrene Butadiene Rubber) technology

A technology of activated sludge and viscose fiber, applied in energy wastewater treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problem of low initial sludge activity, long activated sludge cultivation period, and reduced commissioning and trial operation time and other problems, to achieve the effect of shortening the trial run time, improving properties and reducing emissions

Active Publication Date: 2012-07-25
ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention is mainly used to solve the problems of too long cultivation period of activated sludge from different sources and low activity of initial sludge, so as to reduce the time of commissioning and trial operation, and reduce the damage to the environment caused by the discharge of non-standard wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] SBR process unit pool Effective volume 5000 m 3 , length 100 m, width 10 m, effective depth 5 m Residue activated sludge press filter mud cake of urban sewage treatment plant in a certain city The cake forming time is 1 day, and the cake forming method is a belt filter press, with a volume of 250m 3 , moisture content 35%, black appearance, slightly smelly, soft and slightly elastic to the touch Dosing spare materials in the pool 1000 kg plain flour, 100 kg urea, 20 kg phosphate fertilizer (superphosphate) Viscose wastewater pH value 8.6, COD cr 480 mg / L, Zn 2+ Content 0.2 mg / L

[0025] The SBR process often operates several groups of unit pools jointly, and the total effective volume of a single cell is selected to be 5000 m 3 , of which the length is 100 m, the width is 10 m, and the effective depth is 5 m. The activated sludge strain used for inoculation is the remaining activated sludge from an urban sewage treatment plant in ...

Embodiment 2

[0027] Total volume of mixed liquid in the pool 2500 m 3 Dissolved oxygen in the pool mixture 2.2mg / L SV of activated sludge 30 19 % MLVSS value of activated sludge 3000mg / L Apparent properties of activated sludge The odor is eliminated, the fishy smell is getting stronger, the flocs are small and dispersed, and they are yellowish brown

[0028] After 7 days of continuous cultivation, the dissolved oxygen content in the pond was controlled at about 2.2 mg / L by intermittent aeration. At this time, if the dissolved oxygen content is too high, some microorganisms will be oxidized and consumed, and if the dissolved oxygen content is too low, the microorganisms cannot be effectively activated. At this time, the activated sludge in the pool has a certain degradation ability to the organic substrate, which needs to be determined according to the measured COD cr (converted to BOD 5 ) or BOD 5 To control the amount of flour, urea, and phosp...

Embodiment 3

[0030] Total volume of mixed liquid in the pool 5000 m 3 Dissolved oxygen in the pool mixture 1.9mg / L SV of activated sludge 30 27 % MLVSS value of activated sludge 2600mg / L Apparent properties of activated sludge Slight odor, strong fishy smell, flocs are large but dispersed, brown in color

[0031] From the 8th day, gradually enter the viscose fiber wastewater to be treated, until the 15th day the total solution in the pool reaches 5000 m 3 . After continuous cultivation, the dissolved oxygen content in the pond is controlled at about 1.9 mg / L through continuous aeration (the amount of aeration is adjusted by the valve opening of the tubular variable microporous aerator). At this time, due to the entry of viscose fiber wastewater, The activity of microorganisms in the pool is inhibited. If the dissolved oxygen content is too high, some microorganisms will be oxidized and consumed. If the dissolved oxygen content is too low, the micro...

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Abstract

The invention discloses a quick culture method for activated sludge during the process of viscose waste water by a SBR (Styrene Butadiene Rubber) technology, which belongs to the technical field of the sewage biotreatment and particularly relates to a quick culture method for mature activated sludge in a SBR technical unit when the viscose waste water is processed by the SBR technology and is mainly used for solving the problems of long culture period and low initial-stage sludge activity of the activated sludge of different sources so as to shorten debugging test run time and reduce damage to the environment by substandard waste water. The invention provides the quick culture method which can culture a fresh mud cake in a city sewage treatment plant into the mature activated sludge capable of processing viscose waste water in the SBR technical unit, and the culture period of the mature activated sludge can be controlled to 35-45 days; the cultured activated sludge is scentless, has thick fishlike smell, is ustulate, and has big floc and good huddling performance; SV30 is 25-35%, and an MLVSS (mixed liquor volatile suspended solid) value is controlled to be stably 3500-4500mg / L; and the CODcr (chemical oxygen demand) degradation rate of the discharged waste water is 80-90%.

Description

[0001] technical field [0002] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a rapid cultivation method for mature activated sludge in an SBR process unit pool when an SBR process is used to treat viscose wastewater. Background technique [0003] Newly built viscose fiber wastewater biochemical treatment facilities often do not have suitable activated sludge available, and the volume of activated sludge solution required is huge. Due to the different nutrient substrates and water environments, when using fresh activated sludge press filter cakes from other different types of sewage treatment plants as the inoculum, the mature and suitable activated sludge must go through the cultivation process of inoculation, reproduction and domestication. At present, there are two types of activated sludge cultivation methods due to changes in the substrate environment: one is the intermittent cultivation method, which intro...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10Y02W10/37
Inventor 韩东浩张学富周辉谭玉龙钱震一郭宇锋徐锋军杨欢天黄利波
Owner ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD
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