Construction units in the river, lake new construction, alteration, expansion of sewage outfalls, shall obtain the consent of the competent department of water administration or watershed management agencies.
Biological method of sewage treatment using microorganisms in the sewage oxidation of organic matter, decomposition of metabolic processes. Activated sludge, biofilter, biological rotary oxidation pond, anaerobic digestion and other chemical methods of wastewater classification.