Strengthened starting method of gravity type ultrafiltration manganese removal process based on potassium permanganate pre-oxidation
A potassium permanganate and gravity-type technology, applied in chemical instruments and methods, oxidized water/sewage treatment, special treatment targets, etc., can solve the problems of long start-up period, unstable manganese removal effect, and complicated operation of the manganese removal process , to achieve the effect of low water quality requirements, broad application prospects and promotion value, and low technical difficulty
Pending Publication Date: 2022-03-11
BEIJING UNIV OF TECH
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Problems solved by technology
[0006] In order to solve the problems of long start-up period, unstable manganese removal effect, complicated operation and difficult operation and maintenance in the existing gravity ultrafiltration process, the present invention aims to establish a gravity ultrafiltration based on potassium permanganate pre-oxidation. Intensified start-up method of manganese filtration process in order to realize rapid start-up of gravity ultrafiltration manganese removal function
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Embodiment 1
[0027] Taking the raw water of a manganese-containing surface reservoir in Hainan as an example, the raw water quality indicators are as follows: manganese content 0.51mg / L, permanganate oxygen consumption 2.0mg / L, UV 254 0.038cm -1 , ammonia nitrogen content 0.35mg / L, turbidity 3.05NTU, chlorophyll a0.035, and the manganese content is much higher than the limit of 0.1mg / L in the drinking water hygiene standard (GB5749-2006).
[0028] Adopt a kind of method for strengthening the start-up of the gravity type ultrafiltration manganese removal process based on potassium permanganate pre-oxidation of the present invention, its composition sees figure 1 . The specific operation method is as follows:
[0029] 1) According to the manganese content of the raw water and the oxygen consumption of permanganate, the dosage range of potassium permanganate is determined to be 1.1-1.4mg / L, and the dosage of potassium permanganate is gradually increased within the determined dosage range, ...
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The invention discloses an enhanced starting method of a gravity type ultrafiltration manganese removal process based on potassium permanganate pre-oxidation, and belongs to the field of water treatment. The potassium permanganate pre-oxidation technology is adopted in the intensified start-up stage to shorten the start-up stage of the gravity type ultrafiltration manganese removal process, and the gravity type ultrafiltration process can efficiently and stably remove manganese in polluted surface water under the conditions that potassium permanganate is not added and hydraulic backwashing and chemical cleaning are not carried out after entering the stable operation stage. Continuously adding potassium permanganate in a moderate adding amount mode to strengthen and accelerate the formation process of a manganese active filter cake layer on the surface of the ultrafiltration membrane in the start-up stage until the manganese content of membrane filtration water of the gravity type external pressure ultrafiltration membrane is continuously lower than 0.1 mg / L; in the stable operation stage, manganese-containing surface water raw water can directly enter the membrane pool in a gravity flow mode, and efficient and stable removal of manganese can be achieved by means of catalytic oxidation and physical interception effects of a manganese active filter cake layer on the surface of the ultrafiltration membrane.
Description
technical field [0001] The invention relates to the fields of decontamination and water quality purification in natural surface water and water resource utilization, in particular to an intensified start-up method of a gravity ultrafiltration manganese removal process based on potassium permanganate preoxidation, which belongs to the field of water treatment. Background technique [0002] In recent years, with the rapid development of my country's industry, mining, construction and other fields, the phenomenon of manganese pollution in various natural surface waters has become increasingly serious, showing the characteristics of endogenous pollution, both seasonal and sudden. According to the survey, some surface water reservoirs, lakes, rivers, etc. have various degrees of seasonal and sudden manganese exceeding the standard, and the manganese concentration is in the range of 0.2mg / L-4.0mg / L, far exceeding the hygienic standard for drinking water ( GB5749-2006) the manganes...
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Login to View More IPC IPC(8): C02F9/04C02F101/20
CPCC02F9/00C02F1/72C02F1/725C02F1/444C02F1/64C02F2101/206C02F2303/14
Inventor 李星柳志豪杨艳玲
Owner BEIJING UNIV OF TECH