Bioremediation
By Jael Batty
Constructed wetlands, which mimic natural wetlands, treat municipal and industrial wastewater, mine drainage, small business and household greywater, animal wastes, and agricultural and stormwater runoff. They are recommended by regulatory agencies as a best management practice to control urban runoff.
Read more about constructed wetlands
A citrus plant struggled with poor settling in the clarifier of its wastewater treatment, which caused the sludge blanket to remain high. Even at a low flow rate of 1.2 million gallons per day (MGD), the high sludge blanked allowed less than 18” of free board. The slightest flow increase caused solids to carry over the weir with the effluent. Since the citrus plant frequently produced wastewater flows 1.5 to 2.5 MGD, the wastewater treatment plant continued to suffer from solids washout and clarifier effluent total suspended solids (TSS) excursions. The citrus plant wastewater treatment was a 6 million gallon per day (MGD) traditional aeration system with secondary clarification.
Read more about improving SVI
Within a few months of operation, a lagoon and spray field system at a corn processing plant in Indiana began giving off offensive odors. Chemical oxygen demand (COD) levels in the anaerobic and aerobic lagoons climbed to 8,000 mg/L and 4,000 mg/L respectively. The pH in the anaerobic lagoon was dropping dangerously low for methane production. Attempts to resolve the issues with bacteria, odor masking products, and lime were unsuccessful and short-term at best. Lime settled to the bottom of the lagoons, temporarily raising pH and reducing odors. The odor soon became unmanageable and an annoyance to neighbors.
Read more about odor reduction
A plastic manufacturer in Taiwan needed a new process to efficiently treat elevated incoming chemical oxygen demand (COD) to comply with stringent EPA regulations for effluent discharge. The plant is an activated sludge treatment system with an influent of approximately 2,000 cubic meters per day (CMD) which is equivalent to approximately 530,000 gallons per day (GPD). The plant was unable to bring the plant into compliance using alternative technologies.
Read more about treating elevated COD
By Jael Batty
Sewage sludge is a controversial input for farmers to use. Considering the toxins in today’s wastewater, are our treatments and regulations effective in eliminating micropollutants from sludge?
Read more about recycled sewage
By Jael Batty
Caffeine isn’t just prevalent in our food––it’s prevalent in our wastewater, waterways, and treated water.
By Jael Batty
The UN warns that by 2030, over half the world will be water-stressed, affecting food production and increasing exposure to waterborne disease. There is enormous potential in directly recycled wastewater. Unfortunately, attempts at wastewater recycling have historically been shot down by the public.1 Thus, most treated wastewater is dumped into oceans and other water sources, becoming wasted water.2 Continue reading
Hurricane Irma hit Southern Florida in early September as a Category 5 hurricane with winds of 180 miles per hour. Due to flooding and lack of power, millions of gallons of untreated or partially treated wastewater were spilled or discharged from overwhelmed systems Continue reading
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