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Device and method for performing advanced treatment on citric acid waste water through dual membrane process

A technology for citric acid wastewater and advanced treatment, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of improving the overall water production rate, low operating energy consumption, and reducing operating costs

Active Publication Date: 2012-09-26
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned treatment methods are complicated, have high operating costs and little effect, and are not suitable for popularization and application.

Method used

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  • Device and method for performing advanced treatment on citric acid waste water through dual membrane process
  • Device and method for performing advanced treatment on citric acid waste water through dual membrane process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 As shown, a device for advanced treatment of citric acid wastewater according to the present invention includes a water inlet system, a flocculation sedimentation system, a ceramic membrane ultrafiltration system and a reverse osmosis system connected in sequence. The water inlet system includes an inlet pump 1; the flocculation and sedimentation system includes a flocculant storage tank 2, a flocculant metering pump 3, an inclined tube settling tank 4 and a clear liquid tank 5; the ceramic membrane ultrafiltration system includes a ceramic membrane ultrafiltration module 6 and ceramic Membrane feed pump 7; reverse osmosis system includes reverse osmosis component 10, feed pump 11 and reverse osmosis concentrated water tank 12; citric acid wastewater enters inclined tube settling tank 4 through inlet pump 1, and is discharged to The clear liquid pool 5 is pumped by the ceramic membrane feed pump 7 to the ceramic membrane ultrafiltration module 6 for ult...

Embodiment 2

[0058] Compared with Embodiment 1, the only difference is that ceramic membrane recoil pump 8 is provided in ceramic membrane ultrafiltration assembly 6 in this embodiment, and the connection sequence of each part is as follows: inlet pump 1 is connected to inclined tube settling tank 4, and in the A flocculant storage tank 2 and a flocculant metering pump 3 are arranged between the water inlet pump 1 and the inclined tube settling tank 4, wherein the inclined tube settling tank 4, the clear liquid tank 5, the ceramic membrane ultrafiltration module 6, and the ceramic membrane feeding pump 7 , a ceramic membrane recoil pump 8, an intermediate pool 9, a reverse osmosis component 10, a reverse osmosis feed pump 11 and a reverse osmosis concentrated water pool 12 are connected in sequence.

[0059] In this embodiment, the inclined tube settling tank 4 adopts Ф60 honeycomb packing.

[0060] In this embodiment, the material of the ceramic ultrafiltration membrane is alumina, and th...

Embodiment 3

[0063] Compared with Example 2, the difference is only that: the ceramic membrane ultrafiltration assembly in this embodiment includes a ceramic ultrafiltration membrane and a ceramic membrane recoil pump; the material of the ceramic ultrafiltration membrane is zirconia, and the ceramic ultrafiltration membrane The average pore size ranges from 0.02-0.1 μm. The reverse osmosis component is a roll type reverse osmosis membrane.

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Abstract

The invention relates to a device and a method for performing advanced treatment on citric acid waste water through dual membrane process. The device comprises an inflow system, a flocculating settling system, a ceramic membrane ultrafiltration system and a reverse osmosis system which are connected in sequence. The method is characterized in that citric acid waste water processed after (Anoxic / Oxic) A / O process is further flocculated and settled and then enters into the ceramic membrane ultrafiltration system. Effluent of the ceramic membrane ultrafiltration system meets requirements that Silting Density Index (SDI) is equal to or less than 2 and is then processed by the reverse osmosis system. Reverse osmosis (RO) effluent can be directly used as process water (workshop section including size mixing, fermentation, extraction, lime milk configuration and the like) for producing citric acid and softening water (circulating cooling water and make-up water). By means of the dual membrane process, the device and the method realize treatment and reuse of citric acid waste water, the equipment is compact, the automation degree is high, the operation is simple and convenient, effluent quality is good and stable and the device and method have remarkable environmental benefit and economic benefit.

Description

technical field [0001] The present invention relates to a device and method for advanced treatment of citric acid wastewater by double-membrane method, in particular to a device and method for treating citric acid wastewater by adopting flocculation+sedimentation+ceramic ultrafiltration membrane+RO combined process and reaching the recycling standard. The method belongs to the field of waste water treatment and reuse. Background technique [0002] With the rapid development of my country's economy, the consumption of water resources has doubled. On the one hand, it has caused a shortage of water resources. The continuous improvement of water quality discharge standards has prompted more and more enterprises to raise the standard of sewage discharge or reuse to a very high position from the perspective of economic and social benefits. [0003] As an important chemical raw material and food additive, citric acid is widely used. Its production is made from dried potato or corn...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/52C02F1/44
Inventor 彭文博谷孝明秦泗光寇琴张路兵王佳艳
Owner JIANGSU JIUWU HITECH
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