The septic tank is commonly accepted as sewage treatment unit in isolated areas even if its performance is not consistent. The methods employed for disposal of such effluent are unsafe and needs careful attention to avoid risk to the public health. Constructed Wetland Treatment Systems (CWTS) have been used extensively now-a-days in some parts of the world for wastewater treatment.

Experiments were carried out in laboratory using small reed bed to treat municipal sewage.

Laboratory studies were conducted to assess the influence of media related factors such as particle size, porosity, pore size and specific surface area on performance of upflow anaerobic biofilters (AnBFs). Three simple models of 8 litres capacity upflow anaerobic biofilters packed with support media granite of size 40 mm, 20 mm and 10 mm respectively were installed.

Ultraviolet light kills bacteria in wastewater without the use of chemicals. This reliable and environment friendly method was used in the project Clean Isar in Germany.

The aim of this work was to evaluate the performance of UASB reactor for treating municipal wastewater.

One of the most pervasive problems afflicting people throughout the world is inadequate access to clean water and sanitation.

Two under-construction treatment plants for treating sewage and enabling it to be used for irrigating lands instead of discharging into the River Indus and Phulelli Canal, would be ready by next month

Chennai Metrowater will soon impart training to technical staff and engineers of various government agencies involved in operation and maintenance of sewage treatment plants in a few other States.

The Greater Mohali Area Development Authority has started the testing of a 10 million gallon per day capacity sewage treatment plant constructed in the proposed Sector 83 of SAS Nagar. This is the first sewage treatment plant developed in SAS Nagar that will cater to the residential as well as industrial sectors up to Sector 82 in SAS Nagar. The capacity of the plant will subsequently be extended to 15 million gallon per day, as and when the need arises. The plant is constructed in approximately 23 acres. The construction work of the plant was allotted to M/s Enviro Control Associates (India) Private Ltd, Surat, on 15-2-2006, with an estimated cost of Rs 20.30 crore. The cost includes construction of the plant as well as its operation and maintenance for a period of five year after the date of completion.

Membranes are key components in the majority of plants treating waste water for recycle. These days there are not only relatively small scale plants recycling waste water in factories but also large scale plants treating waste water from cities for recycle. Oct-Dec 2007