All wastewater treatment follows the same basic premise, water used in manufacturing, agriculture, municipal, food processing, wineries, you name it gets dirtied with so called contaminants or production byproducts and needs to be cleaned, or treated, for reuse or discharge.
It is now becoming apparent, however, that a process in-between RO and UF, or ‘nanofiltration (NF),’ may prove to meet the greatest needs of the beverage industry which is fine filtration of particles and only a slight reduction of dissolved contaminants.
UF can be thought to be ‘under-engineered’ where the potential exists for alkalinity or other inorganic contamination to rise above their respective limitations. RO, on the other hand, may be thought to be over-engineered’ in that it provides a water quality many magnitudes beyond known soft drink requirements, at a higher cost.
Biological wastewater treatment is a process that seems simple on the surface since it uses natural processes to help with the decomposition of organic substances, but in fact, it’s a complex process at the intersection of biology and biochemistry — a process not completely understood.
Biological treatments rely on bacteria, nematodes, or other small organisms to break down organic wastes using normal cellular processes. Wastewater typically contains a buffet of organic matter, such as garbage, wastes, and partially digested foods. It may also contain pathogenic organisms, heavy metals, and toxins.
Clean drinking water is an essential need of mankind. Often surface water like rivers or lakes is used as drinking water source. To prevent these resources from pollution the effective treatment of waste water is a must. For example in China 75% of discharged waste water is coming from pulp and paper, textile and dyeing industries. To run a waste water treatment plant in the most efficient way certain measurement technologies have to be available. In respect to size of the plant and individual efficiency objective 3 different types of measurement parameters have to be distinguished.Parameters that are essential to ensure the cleaning process on a waste water treatment plant like pH and DO Parameters that shows the efficiency of the plant like BOD and COD Parameters helping to optimize the plant like DO, ammonium, nitrate, nitrite and phosphorous Parameters that are essential to run a waste water treatment plant – pH-value and DO-concentration to run a waste water treatment plant at all the pH-value as well as the dissolved oxygen (DO) content have to be monitored. A stream of inlet water with a pH-value outside of a range from 6.0 to 9.0 will cease the activity the micro-organism needed for the cleaning process. Besides that a pH-value below 6.5 will destroy the concrete of the facilities.During the cleaning process a sufficient amount of dissolved oxygen for growth and metabolism of micro-organism has to be ensured. A DO concentration of 1-2 mg/l is sufficient in a aeration tank. Higher DO-content will not necessarily increase the cleaning efficiency. Blowing air into the aeration tank should be adjusted to that DO-concentration of 2 mg/L, more is just wasted energy.
Effluent Treatment Process of Various Industries..
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Membrane bioreactor (MBR)
Membrane bioreactor (MBR)
Membrane bioreactor (MBR) is the combination of a membrane process like microfiltration or ultrafiltration with a suspended growth bioreactor, and is now widely used for municipal and industrial wastewater treatment with plant sizes up to 80,000 population equivalent (i.e. 48 million liters per day).