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explain cercla and sara - hazardous waste regulations in 1980 the comprehensive environmental response compensation and liability act cercla was
explain rcra and hswa - hazardous waste regulations1 in 1976 congress passed the resource conservation and recovery act rcra and directed epa to
explain some important points for hazardous waste the mixture rule prevents dilution of waste for the purposes of escaping rcra regulation mixtures
explain the toxic characteristics - hazardous waste- from the results of either - extraction procedureep toxicity prior to march 1990 or toxicity
define reactivity - hazardous waste- undergoes violent change wo detonating- reacts violently with water- forms potentially explosive mixtures with
define the ignitability - hazardous waste- is a liquid with flash point lt60degc some exceptions- not a liquid and capable of spontaneous and
define the hazardous waste1 any waste or combination of waste that poses a substantial danger now or future to humans plants and animals without
calculate the amount of wastea municipal solid waste department plans to separate a portion of the ferrous metal newsprint and cardboard from its msw
explain the modular incinerators1 prefabricated units with capacities of 45 to 107 tons of solid wasteday2 most use a system involving two combustion
explain fluidized-bed incinerators sand is heated to 800c by oil or gas and blown around fluidized by a blower that sends air from bottom upward
explain the conventional incineration and refuse-derived fuel facilities1 conventional mass-fired incineration most common form of municipal solid
define the combustion of solid wastea chemical reaction in which the elements in fuel oxidize in presence of excess oxygenc rarr co2 h rarr h2o
explain the classification of solid waste solid waste can be classified in several different ways putrescible waste - animal and vegetable
what is the sludge volume indextwo 1 l samples of mixed liquor are taken from a lagoon after settling for 30 min in a graduated cylinder 250 ml of
explain the activitated sludge aeration tankthe activated sludge treatment process is a biochemical oxidation process organic solids are stabilized
a wastewater plant is operating at 10mgd with a suspended solids concentration of 200mgl it has 6 clarifiers operating in parallel each clarifier is
explain the typical wastewater characteristicstotal suspended solids 100 - 350 mgl 200 mgl is the typical value bod5 100-300 mgl 200 mgl is
explain the tertiary treatment for wastewatertertiary treatment in cases where secondary treatment is not adequate particularly if the discharges are
explain the secondary treatment for wastewatersecondary treatment to remove soluble bod that escapes the primary treatment and to provide added
explain the primary treatment for wastewaterprimary treatment to remove the pollutants that floats or settles typically 60 of suspended solids and 35
define wastewater treatment processesthe wastewater treatment processes that we design mimic the processes that occur in the nature for example
explain chlorine residualsfree chlorine residuals cl2 hocl ocl- combined chlorine residuals chloramines mono di and tri chloraminesthe
explain some points regarding to hardness1 hardness removal using lime and soda is based on the solubility reactions of calcium carbonate caco3 and
non-carbonate hardness nch - water softening1 permanent hardness not removed by heating water2 ca2 mg2 combining with ions outside of alkalinity such
carbonate hardness ch - water softeningca2 mg2 combining with alkalinity oh- co3-2 hco3- if alkalinity is present in water the ch will