floc

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floc

[fläk]
(chemistry)
Small masses formed in a fluid through coagulation, agglomeration, or biochemical reaction of fine suspended particles.
References in periodicals archive ?
Xu, "Effect of the cationic block structure on the characteristics of sludge flocs formed by charge neutralization and patching," Materials, vol.
Glycerol was added at the beginning of the test, but number and size of flocs decreased continually, due to biomass sedimentation and clunning to sensors.
In order to describe the separation performance under the influence of the type F flocculant we will use a fractal dimension of the formed flocs. A floc that is composed of N primary particles of radius [R.sub.o] (assumed to be 5 [micro]m--based on image analysis of many sample photos) can be described using the following power law scaling relation (Mandelbrot, 1987)
The significance of flocs in relation to the total number of particles in suspension and to the total volume of suspended solids f rom various rivers in southeastern Canada (reproduced from Droppo and Ong ley, 1994).
However, during late morning and early evening hours, even the addition of the polymer did not improve floc settling characteristics.
Fitch Loans of Concern: The largest FLOC is Patton Creek (5.7%), which is secured by a 484,706-sf retail power center located in Hoover, AL that has experienced declining occupancy and cash flow since issuance.
The PEO-CF complex could also lose its flocculant ability with time, increasing the amount of broken flocs.
Three additional loans are considered FLOCs. One is a loan secured by a full-service hotel (0.8%) located in Atlanta, GA that has seen declining cash flow.
Alternative Loss Considerations: Fitch performed an additional sensitivity scenario, which assumed a potential outsized loss of 50% on both of the FLOCs, while also factoring in the expected paydown of the transaction from defeased loans and from the loan maturing in 2018.
It designated eight loans (26.1% of pool) as FLOCS, including four in the top 15 (22.9%), two of which are secured by regional mall properties with declining occupancy and declining sales trends since issuance.
The affirmations reflect the majority of the loans in the pool exhibiting stable performance and increased credit enhancement in light of increased loss expectations on the Fitch Loans of Concern (FLOCs).
The activated sludge was dominated by large compact flocs without any slime content.