Track topics on Twitter Track topics that are important to you
Controlled struvite (NH4MgPO4·6H2O) precipitation has become a well-known process for nutrient recovery from wastewater treatment systems to alleviate the pressures of diminishing, finite rock phosphate reservoirs. Nonetheless, co-precipitation of potential microbial and chemical hazards is poorly understood. On the other hand, antibiotic resistance is a major global public health concern and wastewater is thought to disseminate resistance genes within bacteria. Focusing on struvite produced from full-scale operations, culture and qPCR methods were utilized to identify fecal indicator bacteria, antibiotic resistance genes and human enteric viruses in the final product. Detection of these hazards occurred in both wet and dry struvite samples indicating that there is a potential risk that needs further consideration. Chemical and biological analyses support the idea that the presence of other wastewater components can impact struvite formation through ion and microbial interference. While heavy metal concentrations met current fertilizer standards, the presence of K, Na, Ca and Fe ions can impact struvite purity yet provide benefit for agricultural uses. Additionally, the quantified hazards detected varied among struvite samples produced from different methods and sources, thus indicating that production methods could be a large factor in the risk associated with wastewater-recovered struvite. In all, co-precipitation of metals, fecal indicator bacteria, antimicrobial resistance genes and human enteric viruses with struvite was shown to be likely and future engineered wastewater systems producing struvite may require additional step(s) to manage these newly identified public health risks.
This article was published in the following journal.
Name: Environmental science & technology
Human urine is characterized by high concentrations of nitrogen (N), phosphorus (P) and potassium (K), of which the P and K can be recovered as K-struvite crystals. This study first investigated the f...
Struvite precipitation has drawn much attention in the last decade as a green chemical process for phosphorus removal and recovery. Product purity affects the usefulness, and thus price, of the produc...
Controlled K-struvite crystallization is an attractive technology to simultaneously recover phosphate and potassium from urine. This study investigated the recovery of phosphate and potassium from sou...
We developed an efficient, scalable, and inexpensive method for recovering cellular biomass from complex fluid matrices that cannot be processed using conventional filtration methods. The method uses ...
A comparative investigation of hydroxide precipitation, sulfide precipitation, carbonate precipitation and the struvite formation process for removing manganese and ammonia nitrogen from electrolytic ...
The aim of this research is to determine an effective antibiotic regimen following definitive surgical therapy of kidney stones caused by bacterial infection (struvite stones).
Microorganisms that colonize hospital environments play an important role in the transmission of hospital acquired infections (HAI) and multi-drug resistant organisms. Previous studies exa...
The effect of microbial exposure on healthy human subjects will be investigated. Changes in cytokine and IgE and vaccine response will be measured. The hypothesis is that microbial exposur...
Retrospective study of the data reported in the Obalon US Commercial Registry
The purpose of this study is to demonstrate bioequivalence of the Commercial Image Capsule (CIC) relative to the Immediate Release Tablet (IRT) of crizotinib, bioequivalence of CIC relativ...
The mineral magnesium ammonium phosphate with the formula NH4MgPO4. It is associated with urea-splitting organisms in a high magnesium, high phosphate, alkaline environment. Accumulation of crystallized struvite is found in the urinary tract as struvite CALCULI and as scale on sewage system equipment and wastewater pipes.
Light absorbing proteins and protein prosthetic groups found in certain microorganisms. Some microbial photoreceptors initiate specific chemical reactions which signal a change in the environment, while others generate energy by pumping specific ions across a cellular membrane.
Low-density crystals or stones in any part of the URINARY TRACT. Their chemical compositions often include CALCIUM OXALATE, magnesium ammonium phosphate (struvite), CYSTINE, or URIC ACID.
The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)
The increase in a measurable parameter of a PHYSIOLOGICAL PROCESS, including cellular, microbial, and plant; immunological, cardiovascular, respiratory, reproductive, urinary, digestive, neural, musculoskeletal, ocular, and skin physiological processes; or METABOLIC PROCESS, including enzymatic and other pharmacological processes, by a drug or other chemical.
MRSA (methicillin-resistant Staphylococcus aureus)
MRSA (methicillin-resistant Staphylococcus aureus) is a family of bacteria with resistance to one or more major antibiotics. There are currently 17 different strains of MRSA. Two particular strains, EMRSA15 and EMRSA16 account for 96% of MRSA blood...
Alternative Medicine Cleft Palate Complementary & Alternative Medicine Congenital Diseases Dentistry Ear Nose & Throat Food Safety Geriatrics Healthcare Hearing Medical Devices MRSA Muscular Dyst...