On-line medicine cleaning method applicable to sewage treatment MBR (Membrane Bio-Reactor) membrane
A technology for sewage treatment and sewage treatment equipment, applied in the field of environmental engineering, can solve the problems of difficult on-site implementation, the problems of anti-freezing and anti-drying cannot be well solved, achieve good operability, solve the problems of cleaning, maintenance, anti-freezing and anti-drying, and implement Convenient and fast effects
Inactive Publication Date: 2018-09-04
E TECH ENERGY TECH DEV CORP
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Problems solved by technology
For off-line chemical cleaning, although the cleaning of the MBR film is relatively thorough, it is difficult to implement on-site in the cold winter climate in the north. The problem of antifreeze and anti-drying cannot be solved well, and the on-site implementation is difficult
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Embodiment 1
[0022] An online chemical cleaning method suitable for sewage treatment MBR membranes, including: sewage treatment device pretreatment, three-component chemical cleaning, system recovery process:
[0023] 1. Pretreatment of sewage treatment plant
[0024] The key to MBR membrane cleaning and pretreatment technology of sewage treatment plants is to save as much activated sludge in the system as possible, so that the sewage treatment system can resume normal operation as soon as possible after MBR membrane cleaning.
[0025] Specific steps: a first bypass the water inlet pipe of the system; b empty the sewage in the container of the pretreatment section (free up space to load activated sludge); c stop the membrane from the MBR tank and aerate for a certain period of time (effectively peel off the membrane The mounted pollutants on the silk); d import the membrane pool liquid into the pretreatment section container (storage of activated sludge).
[0026] 2. Three-component chemi...
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The invention relates to an on-line medicine cleaning method applicable to a sewage treatment MBR (Membrane Bio-Reactor) membrane, belongs to the technical field of environment engineering and discloses the on-line medicine cleaning method applicable to the sewage treatment MBR membrane. The method comprises the following process steps: (1) pretreating by using a sewage treatment device, namely retaining activated sludge in a system; (2) cleaning with three component medicines, namely introducing clean water, feeding the clean water through a membrane component, adding sodium hydroxide and sodium hypochlorite, performing alkali washing and soaking, emptying a washing liquid, replacing the clean water, adding citric acid to perform acid washing and soaking, emptying the washing liquid, replacing the clean water, performing water washing and soaking, and emptying the washing liquid; (3) performing system recovery, namely leading back the retained activated sludge after pretreatment intoan MBR tank, putting nutrient salt into the MBR tank, performing aeration operation on the system to carry out activated sludge culture, and increasing treatment capacities of treatment loads at threestages. By adopting the method, antifreezing and dehydration problems of an MBR membrane component in winter treatment can be effectively solved, the feasibility and the reliability of winter maintenance and repairing of the MBR membrane of the sewage treatment device can be ensured, and the method is relatively convenient and rapid to implement.
Description
technical field [0001] The invention belongs to the technical field of environmental engineering, in particular to an online chemical cleaning method suitable for sewage treatment MBR membranes. Background technique [0002] At present, most offshore oil production platforms use MBR technology for the treatment of domestic sewage. The biggest problem in the use of devices using MBR domestic sewage treatment technology is the need for regular maintenance and maintenance of the MBR membrane. One of the most critical is the cleaning technology of the MBR membrane. [0003] The cleaning technology of MBR membrane is divided into physical cleaning and chemical cleaning. Generally, physical cleaning technology is used online and chemical cleaning technology is used offline. Although off-line chemical cleaning can clean the MBR membrane more thoroughly, it is difficult to implement on-site in the cold winter climate in the north. In order to solve this problem, the present inve...
Claims
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IPC IPC(8): C02F3/12
CPCC02F3/1268C02F2203/006C02F2303/16Y02W10/10
Inventor 邓文海皮新燕
Owner E TECH ENERGY TECH DEV CORP