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Sewage water recycling issue


The total cost divided by the various recycling equipment can be the sum of renewable water supply, reclaimed water standards obtained 1m3 depreciation, maintenance standards. As for the maintenance and management fees, in accordance with the approach used in the regeneration, respectively, the maintenance of the facilities annual management fee added together, divided by the annual re-use of water, recycled water obtained 1m standard maintenance and management fees. The standard depreciation, maintenance standards, the standard maintenance fee that is added to the standard approach derived renewable re-use costs. 3 recycled water to flush toilets with recycled water and water in the water the most expensive. Under the agreement, the cost of water is based on the re-use, considering water costs to develop, the average price of 200 yen /. Industry,UGG milano, agriculture, specific cause of most water treatment without the additional secondary treatment of water, so is the cost and operation of sewerage facilities under the management fee to charge. Utilities, maintenance landscape, rivers, water, water sprinkler was l4, 4.85,35 yen /. Reuse of sewage water as a new method of water use. Must be economically viable. So when a small number of beneficiaries is limited, it must be in the form of cost recovery charges. The user is not specific to the majority, the need as a public service to be evaluated. 4, re-use of sewage water treatment problems and countermeasures in the re-use of sewage water, the water quality of reclaimed water issues from the following aspects. ① smell, a color appearance of the problem. ② as landscape water, due to algal bloom and the attachment, unsightly. ③ Since the formation of microbial slime pool tank and flaking, unsightly. ④ corrosion, clogging of water supply equipment. ⑤ water may generate new pathogens. ③ ① a problem for the most basic approach is to maintain the recycled water, the residual chlorine, Civil Engineering Research Institute is currently studying law and rational management of residual chlorine. 5 ways the city's recycling and reuse approach based on the city's \Use more water to flush toilets with water alone is a closed loop cycle is to use the clean pool water treatment. The advantages of recycling methods alone, the following aspects. ① Since the occurrence in the source water treatment and recycling, it can reduce the amount of Sheung Shui, while reducing the amount of water discharged. ② No building waterways, which can reduce costs of recycled water supply facilities. ③ Because it is scattered distribution, so the hidden dangers of accidents and disasters small. ④ the Department to use more water drainage drainage drainage and this binary complex drainage systems, recycling is only used if the miscellaneous drainage way, the availability of color, COD low recycled water. Cycle alone, the way defects are as follows: ① According to the utilization of facilities within the building, a large change in displacement will occur, often can not ensure that the necessary amount of water, then be set by the Sheung Shui supplies or high-capacity storage tank. ② unit of water treatment facilities construction costs no advantage at all, but the management fees and inspection fees increase the quality while increasing the number of devices, making maintenance and inspection costs,ugg italia, and thus in the operation and management fees at a disadvantage. To sum up, alone, has the advantage of wide-area circular fashion round-robin fashion weaknesses,UGG boots Italia, but the drawback is alone in cycle mode has the advantage of wide circulation. 6, the choice of wastewater reuse methods and problems associated with water reuse from the costs incurred to consider, re-use to determine the density to become a standard. Way to wide circulation, when the units get water pipe below a certain value, and the pipeline is greater than the increase in the cost due to the reduced scale of fees, so the total cost of the way than the high-cycle alone. Therefore, the use of recycled water density, unit pipeline to send water and more urban centers, suitable for wide area circulation way. But in fact the popularity of the waterway network is not alone in the first round-robin fashion and popularity, combined with drainage to the sewer facilities necessary for the cost of pretreatment, even in wide circulation in the region, the water (use of recycled water + sewer pretreatment facility fee + fees) is sometimes better than water alone, high cycle mode. There are also wide renewable supply of circulating water way than the way cycling alone the situation of poor water quality, so often use more cycles alone mode. But if these problems do not exist, then the cycle alone, the depreciation method of water treatment facilities over time will more easily be converted to wide-area circular fashion. In the regeneration of the above mentioned water,ugg italia, water quality,ugg stivali, pretreatment facilities, costs and so in need of further study. Recycled water use in regions with low density, the use of own cycle approach is reasonable, at this critical is how to ensure stability and security of water quantity and quality. Recycling facilities are part of the pool clean, renewable facilities necessary to develop different standards for cleaning the pool. Journal of the 'civil technical information) 2 ∞ 0 10 von sell versions of the school s 9