Archive for the
‘Wastewater Treatment’ Category

In a fast urbanizing country like India, where freshwater is scarce, waste water treatment is critical.To address surface water quality challenges in quickly increasing and emerging cities, state and non-state entities have gradually shifted their attention to new innovative wastewater management systems. Wastewater Treatment usually includes three basic stages, which are known as primary, secondary and tertiary. Each stage purifies water to a higher level. In certain cases, just one or two phases are required. The level of treatment required is determined by the intended use of the water and the environment into which it will be discharged.

The microorganisms in aerobic systems perform their function in the presence of oxygen, whereas in anaerobic systems, the decomposition process is carried out by microbes in the absence of it. Read on to find out more about aerobic and anaerobic treatment technologies, origins, differences, advantages and disadvantages and much more. 

Dal Lake, one of the largest water bodies in Kashmir and a world-famous tourist attraction, contributes significantly to its economy through tourism, agriculture and fisheries. In addition, it has been a major source of food and water for the people residing in the area. However, pollution in Dal lake has become a concern in recent times as the water characteristics have drastically changed. Moreover, the unpleasant condition has affected the aesthetic value and has reduced the number of tourists visiting the lake.

Typically, a wastewater treatment plant follows three methods: Primary, Secondary and Tertiary, which utilizes physical, biological and chemical processes respectively to treat wastewater. The biological treatment process plays a vital role in the breakdown of organic waste matter generated from households and different industries. There are mainly two types of biological wastewater treatment which are Aerobic biological treatment and Anaerobic biological treatment of effluent. This blog aims to discuss the former.

With the increasing use of advanced technologies for wastewater management and testing, scientists have identified many different types of pollutants which can drastically impact human health and the environment. Moreover, poor effluent quality may not meet standards and regulations established by authorities. Thus, advanced wastewater treatment technologies are required to reduce suspended solids, BOD, nutrients and toxic and remove pollutants in wastewater generated at domestic, industrial and agriculture fields.

With rising population, urbanization and industrialization combined with closing river basins, India is left with highly water stressed regions with the inability to efficiently manage its water resources. Consequently, the average per capita freshwater availability is expected to reduce to 1241 m3 by 2025. It is also estimated that around 29.3 billion cubic meters of water will be required for domestic and industrial purposes by the year 2025. Therefore, efficient and economic biological treatment of industrial wastewater and its reuse have emerged as a potential solution to meet water demands in the future.

Aquaculture is one of the fastest-growing sectors worldwide, and it is no different in Bangladesh. In recent years, aquaculture has expanded and contributed to the socio-economic development of the country. The increasing food and nutrition demand has led to an intensification of aquaculture systems with the help of advanced technology.

It has been reported that chemicals are extensively used by fish farmers in Bangladesh to achieve the current aquaculture productivity in the available land, and to maximize profits. However, the indiscriminate chemical use is a cause of concern as it is known to minimize quality, cause diseases, and in some cases fish kills. Moreover, the concentration of chemicals beyond the permissible limit can cause health hazards to the public and impact the environment.

Fats, Oils and Grease, popularly known by its acronym FOG, has been a growing concern worldwide. It affects the performance of wastewater treatment plants and industrial treatment units. According to reports, 47% of sanitary sewer overflows occur due to FOG related issues in the US. Similarly, more than 50% of sewer blockages happen in the [...]

Wastewater management is one of the major global challenges faced by developed as well as developing countries today. Rapid industrialization has led to extensive industrial wastewater generation which is one of the leading causes of water pollution. Also, stringent treatment regulations are now in place for sewage and industrial effluent being released in the environment. Thus, an effective industrial wastewater treatment strategy is important.