Waste water and sewage from the community, including buildings, houses, offices, commercial buildings, hotels, etc., tampered with waste water containing organic compounds which are decomposed by the ย่อยสลาย substance. Organic is important, bacteria, which are both aerobic bacteria (aerobic bacteria) are bacteria that require free oxygen in the decomposition of organic matter. With anaerobic bacteria (anaerobic bacteria) bacteria degradation organic subsidiaries without relying on oxygen free, another type is Nintendo optical bacteria. Steve. (facultativebacteria) are bacteria that can sustain. Life in both live and why. Another lived oxygen free. Depending on the amount of oxygen condition, environment, role in the degradation of these substances of aerobic bacteria to use oxygen in large quantities. Make the dissolved oxygen water (DIO DO = dissolved oxygen) fell very low, normally water in nature are oxygen dissolved in about 8 mg / L. Or 8 ppm (PPM) is generally the DO lower 3 mg / L held water. Determination of oxygen capacity first aria. T. simulation use. In. To disintegrate organic compounds in water (biochemical oxygen demand) called the acronym BOD tells water quality. If the value BOD high. So in the water with organic compounds are very good. Decomposition of organic compounds of microorganisms to use oxygen. Make the oxygen in the water is left. In general, if the water is higher than any BOD 100 mg / L, respectively. Water is considered broken if water is high BOD or organic compounds. The amount of oxygen in the water is decreased aerobic bacteria will be reduced. Organic compounds are degraded by bacteria, anaerobic bacteria, coffee and logical te Steve next, which will ให้ก๊ gases, such as methane and hydrogen sulfide. Ammonia gas, these causes the odor and color of the water. Change in organic compounds. A.. According to a line. The community also detergent which qualify. On to reduce the surface tension of water, which is circulated. Infrastructure. So high. Food.
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