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Ultra-filtration device for rural domestic wastewater

A technology for domestic sewage and rural areas, applied in ultrafiltration, osmotic/dialysis water/sewage treatment, etc., can solve the problems of inconvenient operation and management, rapid decline in flux, easy blockage of filter membrane, etc., and achieve long operation period and investment operation. The effect of low cost and extended operating cycle

Inactive Publication Date: 2014-04-16
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A rural domestic sewage ultrafiltration device proposed by the present invention mainly solves the problems of conventional tubular ultrafiltration devices such as high energy consumption, inconvenient operation and management, easy clogging of the filter membrane, rapid decline in flux, and short operating cycle.

Method used

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  • Ultra-filtration device for rural domestic wastewater
  • Ultra-filtration device for rural domestic wastewater
  • Ultra-filtration device for rural domestic wastewater

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Embodiment Construction

[0033] The number of reactors can be determined according to the local sewage volume and effluent requirements ( Figure 4 ) A single-stage type and B multi-stage parallel type are designed separately, and finally the expected treatment effect can be achieved. And monitor the effluent water samples to check whether the expected treatment effect is achieved, so as to adjust the system in time.

[0034] The system adopts intermittent operation mode, the working process:

[0035] 1. The first running cycle:

[0036] (1) see figure 1 ,according to figure 1 As shown, the ultrafiltration system and the compressed air power system are installed separately. Open the compressed air valve 1.22 and the air chamber pressure relief valve 1.26, operate the external mechanical or manual power device to return the piston 1.29 to a position 1.31; open the observation hole 1.3, close the compressed air valve 1.22, the air chamber pressure relief valve 1.26, and the concentrated liquid outle...

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Abstract

The invention discloses an ultra-filtration device for rural domestic wastewater, which belongs to the field of sewage treatment (C02F) and mainly solves the problems of high energy consumption, inconvenience in operation management, easy blocking of a filter membrane, rapid reduction of a flux and short operational cycle in a conventional tubular ultra-filtration device. The ultra-filtration device for rural domestic wastewater comprises an ultra-filtration system and a compressed-air power system. An external power is provided for the ultra-filtration device by using a hydraulic device principle to achieve the 'labor-saving' effect; a compressed-air porous diffuser device is designed; as the filter membrane is delayed to strip by using radial high pressure fine airflow and uniform high pressure fine airflow, a membrane flux is improved and an operational cycle of the ultra-filtration device is effectively prolonged. The ultra-filtration device has the advantages of low energy consumption, long operational cycle, low investment and operational costs, convenience in operational management and efficiency in treatment, is especially suitable for centralized treatment of the low-medium concentration rural domestic wastewater subject to pretreatment of an anaerobic tank and has a very high removal rate for COD (Chemical Oxygen Demand), BOD5 (Biochemical Oxygen Demand), NH3-N, SS (suspended solids) and turbidity.

Description

(1) Technical field: [0001] The invention relates to a treatment method and device for rural domestic sewage, especially suitable for centralized treatment of medium and low-concentration rural domestic sewage pretreated by septic tanks, and belongs to the sewage treatment category (C02F). (two) background technology: [0002] The main defects of the existing ultrafiltration device close to the present invention are as follows: (1) the sewage is directly pumped into the tubular ultrafiltration membrane by using a high-power raw water pump, which consumes a lot of energy and the operating cost is difficult to control; The membrane is easy to clog, which leads to a rapid decline in the membrane flux and a short operating cycle; (3) After the filter membrane is clogged, the cleaning is complicated and the maintenance cost is high; (4) The internal structure of the membrane module is complicated, and after the local membrane tube is damaged, it is difficult to repair, resulting i...

Claims

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Application Information

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IPC IPC(8): B01D61/18B01D61/20C02F1/44
Inventor 曾永刚
Owner CHENGDU UNIV
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