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In high-rate activated sludge (HRAS) systems, extracellular adsorption and intracellular storage have been referred to as the dominant mechanisms for capturing organic carbon from wastewater.

However, the quantification of storage products under short sludge retention time (SRT) of HRAS systems has rarely been studied until now. Since the measurement of storage products is complex and dependent on several variables, alternative solutions for substrate removal through storage are required to understand the high-rate...

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Tagstreatment, wastewater treatment, activated sludge, Wastewater, HRAS,

Interested in funding your community’s water, wastewater and stormwater projects at costs lower than market bonding?

Attend an upcoming Texas Water Development Board Financial Assistance Workshop and find out how.

These workshops will also recap the 86th Legislative session and discuss updates in flood mitigation planning.

Austin

When: 9 am. July 30 Where: Texas Commission on Environmental Quality 12100 Park 35 Circle Bldg. F, Room 2210, 2nd floor Austin, TX...

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TagsTWDB, Funding, bonds, Texas Water Development Board, Texas water,

(All Images Courtesy of SARA/MGC Contractors)

Sustainability has become a word mentioned across our lives and the industry but isn’t as clearly defined as other terms like efficiency, safety factor or effluent quality.

According to the United Nations Brundtland Commission Report of 1987, “Sustainable development is…development that meets the needs of the present without compromising the ability of future generations to meet their own needs.”

Its lack of specificity can make...

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TagsEnvision, Sustainability, treatment, wastewater treatment plant, Design,

Freese and Nichols is partnering with John France, OWRB and ASDSO , this summer, to provide a technical workshop on the slope stability of dam embankments. The two-day workshop, which is hosted by the OWRB Dam Safety program , will be led by John France of JWF Consulting LLC, and Freese and Nichols' Marc Miller and Colin Young . This workshop will not only focus on theory but will also provide tools for practical...

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TagsOklahoma Water Resources Board, asdso, soil stresses, slope stability, dam, soil compression,

Although an essential element for living cells, Phosphorus can have serious environmental effects when found in natural or engineering environments.

Major sources of Phosphorus pollution can come from wastewater effluent, commercial chemicals and agricultural waste. Phosphorus minerals, such as struvite and vivianite, can precipitate and form scales in drinking water and wastewater systems.

Although these minerals are problems when left uncontrolled and unmonitored, their recovery is beneficial.

With limited Phosphorus sources...

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TagsWater, Wastewater, treatment, effluent, phosphorus, pollution, Recycling, Sustainability,

(All Images Courtesy of the City of Lubbock)

In the same way a physician meticulously performs open-heart surgery, cities have to modify their water system while it’s still running. But with flexible design and careful attention during construction, the transition to a new “heart” can go seamlessly without disruption of service.

A condition assessment showed the City of Lubbock needed to replace their 61- year-old Pump Station No. 7 (PS7). Known...

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Tagspump station, transmission, utilities, lubbock, West Texas, storage tank, water distribution,

(Graphic Courtesy of NOAA)

Scientists are predicting the Gulf of Mexico’s hypoxic zone to be the size of Massachusetts and close to the record from two years ago.

The hypoxic zone or “dead zone,” which is an area of low to no oxygen that can kill marine life, is forecast by National Oceanic Atmospheric Administration scientists to be approximately 7,829 square miles, close to 2017’s record size of 8,776 square miles and...

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TagsCoastal, marine life, NOAA, weather, prediction, forecast, gulf,

Today, Freese and Nichols joins the dam safety industry today to raise awareness about National Dam Safety Awareness Day.

National Dam Safety Awareness Day commemorates the 1889 failure of South Fork Dam near Johnstown, Pennsylvania, that claimed more than 2,200 lives and led to the public awareness of the importance of dam safety.

The Association of State Dam Safety Officials (ASDSO) calls May 31 a day for “remembering the lessons learned from...

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Tagsdams, dam safety, asdso, USSD,

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