As the discharge requirements for treated secondary effluent become more restrictive, effluent filtration is becoming a more integral part of secondary treatment. Because a high quality effluent is produced after filtration, the potential for reusing treated effluent is being examined by a number of municipalities, especially those in the water-short areas of the southwestern United States. A new concept of filtration in reuse applications and an innovative filter technology is being used to help alleviate some of these problems.
Effluent filtration is an integral part of secondary treatment as discharge requirements become more restrictive
The South Monmouth Regional Sewerage Authority's 9-mgd wastewater plant had been identified as a source of odors that bothered neighbors from time to time. As a result of work done on the plant's two trickling filters, which were shown to be the culprits generating the unpleasant odors, emissions from the filters have been significantly reduced and complaints of odors have been virtually eliminated.
A Philadelphia water company improved the performance of and reduced the operating costs of its filtration system with modernized high-rate gravity filters.
The latest on membrane technology for water treatment.Membrane system technology has been developed to a point where one or more of its forms can be applied to extract most of the contaminants of concern found in many raw water sources. Recognizing the importance of the latest findings to the drinking water supply community, the International Water Supply Association recently conducted a conference on the subject in Paris, France.
A case study describes a full-scale UV disinfection system.The summer floods of 1993 in the Midwest were driven by repeated rains which deluged the region from Minnesota to Missouri. The flood crest on the Mississippi River was 46 feet above normal at its high point, and three feet above the highest ever recorded. For over three months the people of the region had to cope with the problems accompanying the swollen rivers, broken levees and inundated land areas.
A metal plating business in Massachusetts has installed a pollution control system that treats the company's wastewater to the point that it is cleaner than most household wastewater.
A specialized pollution control system is used for pretreatment at a metal plating business in Massachusetts
A wastewater plant increases capacity, but not area.It sits there, looking out over a picturesque scene of water and tree-covered promontories, another excellent example of an old plant upgraded and expanded to handle tighter regulations and an increased population base.
The biologically enhanced carbon process is an option for many water utilities.
Mention the name of this place and people will conjure up a variety of impressions. There's Niagara Falls the honeymoon capital of North America-or at least it used to be. Then there's the scenic wonder of the Falls themselves, the famous Rainbow Bridge, and the touristy but interesting character of the towns on either side of the Falls and the massive downstream gorge-Niagara Falls, New York and Niagara Falls, Ontario. How about the '50s movie, Niagara, with Marilyn Monroe?
Designed and built in the '70s, broken down in the early '80s, the advanced wastewater plant is a success story in the '90s
When a town meeting in New Castle, New York, prompted local government officials to take citizen complaints about water quality seriously, they initiated a lengthy multi-step project to fix the problems. They could not have known then, in the early '80s, that their decision to proceed was timely. The water system improvement program they embarked upon anticipated some of the key regulatory requirements put in place years later, and solved problems of quality and quantity that arose as a result of the growth and development of the town and its surroundings.
A New York State town developed a water treatment plant which uses dissolved air flotation and ozone disinfection to ensure meeting anticipated tighter regulations