Stricter Water
The clarified effluent due to its composition and properties can be used instead of organic-mineral fertilizers. That's why clean them beyond measure is meaningless, that is, delete them from the batteries, so necessary for the plant. Here, Charles Schwab expresses very clear opinions on the subject. Of course, with a decrease in the quality requirements for discharge and treatment system itself is cheaper. Despite the obvious benefits and convenience of such a solution, the discharge of water into the soil is not always rational. When it comes to very large volumes, for example, when connected to a common sewer of several cottages, a ground simply not be able to absorb all the waste.
The same thing happens if the waste water is served in a small volume, but the clay soil at the site (slabofiltruyuschie) or wetlands. In addition, you can not just dump runoff into the ground, if aquifer is very close to the surface and it also serves as a source for water diversion. In all these cases, the wastewater should be given to the pond. However, when such a situation, the construction of treatment systems can do much more because Russia has a very stringent requirements for clean water discharged into the waste water (water should be cleaned up to standards that are close to drinking water, and if the reservoir fishery, then for some Stricter standards for the parameters even more). However, in fairness, it should be noted that the water in the reservoir, which is reset, it is sometimes far dirtier than a well-treated effluent.