In the integrated water purifier treatment system, the dissolved pollutants are first separated from the real solution state by chemical methods to form colloidal particles or micro-suspended particles with a solid-phase interface to realize the regeneration and reuse of urban sewage.
The trial operation of sewage treatment works is different from general building water supply and drainage works or municipal water supply and drainage works. The former includes the startup and debugging of complex biochemical reaction processes. The startup and debugging is slow and time-consuming, and is greatly affected by environmental conditions, water quality and water volume. The latter only requires system water supply and normal operation of the equipment.
Trial operation of sewage treatment projects is equally important as acceptance of the project. Through trial operation, the quality of civil engineering, equipment, and installation projects can be further checked. This is the basis for ensuring high efficiency and energy saving during normal operation, and further realizing the environmental, social and economic benefits of sewage treatment projects.
For the trial operation of sewage treatment projects, we must not only check the project quality, but also check whether the project operation can achieve the designed treatment effect.
Sewage treatment project trial operation content:
(1) Through trial operation, check the quality of civil engineering, equipment, and installation projects, establish relevant equipment archives, and make recommendations on the rationality of the design of related machinery, equipment, and instruments and matters to be noted during operation.
Generally speaking, the lower the conductivity of the wholesale integrated water purifier, the purer the water, the reverse osmosis system is used in the water treatment process. After treatment, the water desalination rate can generally reach 90% -99%.
Although 70.8% of the earth is covered by water, freshwater is extremely limited. What humans can really use are rivers, lakes and a part of water. They only account for 0.26% of the total water of the earth, and they are unevenly distributed.
Since the 1950s, the global population has grown dramatically, industry has developed rapidly, the global water resources situation has deteriorated rapidly, and water resources are becoming increasingly serious. On the one hand, human demand for water has grown at an alarming rate, and on the other hand, increasing water resources Pollution consumes a lot of water resources. The amount of water available.
Every day around the world injects about 200 tons of water into rivers, lakes and streams, contaminating 8 liters of fresh water per liter of wastewater; all rivers flowing through Asian cities are contaminated; 40% of watersheds in the United States are affected by processed food waste, metals, fertilizer and Insecticide pollution; only 5 of the 55 rivers were contaminated. Water quality in Europe is not ideal. The world population doubled in the twentieth century, and human water consumption increased fivefold.
After the integrated water purifier is processed wholesale, the effluent CODcr can be reduced to less than 40 mg / l. It only needs to adopt the engineering cost equivalent to the conventional first and second sewage treatment plants, and the operating cost is lower than the conventional second sewage treatment plant. Reach the effect of processing level. planting.
In a market economy, only by converting the value of sewage treatment into regular capital returns in construction and operating activities, can the reproduction of sewage treatment be achieved. According to the requirements of the value law, it is an objective requirement to accelerate the speed of urban sewage treatment. In order to streamline the sewage treatment input and output into a new order of the market economy, the sewage treatment fee should not be a temporary financing measure, but a market-oriented way to achieve compensation for sewage treatment funds. Economic measures to regulate the rational use of sewage treatment facilities.
In the market economy, self-raised funds for sewage treatment should be based on the law of value for sewage treatment charges, and production development, fixed asset depreciation and major repair costs should be extracted from operating income in accordance with regulations. Sewage treatment units must not only rely on their own strength to complete The unit's sewage treatment business. Simple reproduction and expanded reproduction are subject to taxes, so reasonable charges for wastewater treatment must be based on reasonable costs and profit margins.
The integrated membrane treatment technology of the integrated water purifier is the same as other filtration and separation technologies. During long-term operation, the membrane becomes blocked as a filter medium. Effective backwashing and chemical cleaning can slow down the decline of membrane flux and maintain the effective service life of the system.
In an anoxic tank, microorganisms reduce nitrate nitrogen and nitrite nitrogen in sewage to gaseous nitrogen and escape, decomposing large molecules that are difficult to degrade into small molecules that are easily degradable, and have denitrification, hydrolysis, and degradation of certain substances Functions. In aerobic tanks, most of the materials are treated by microorganisms and separated into sludge water secondary sedimentation tanks and discharged. The A / O process is an energy-saving biological treatment technology that can degrade products at the same time as denitrification and greatly reduce oxygen. The amount needed to maintain the stability of the sludge. The higher the nitrification rate, the longer the reaction residence time, the better the sludge sedimentation performance, the lower the sludge growth rate, the smaller the remaining sludge volume, and the better the sedimentation performance.