>Introduces: REMOVE MT can in the normal temperature and the waste water
each kind of metallic ion for example: Hg2+, Cd2+, Cu2+, Pb2+,
Mn2+, Ni2+, Zn2+, Cr3+, Fe2+ and so on the rapid response, the
production water insoluble stings the compound salt, and forms the
cotton wool shape to precipitate, thus achieved removes the heavy
metal ion the goal. Has the flocculation body thickly,
precipitates quickly, dehydrates quickly, the post-processing is easy,
the sludge quantity are few, does not have characteristic and so on
second pollution, but widely applies to the galvanization industry,
the electronics industry, the petrified industry, the metal working
industry, trash burns down processing, a power plant smoke gas washes
and so on the profession contains heavy metal ion waste water
processing. This experimental goal mainly is for compare REMOVE
MT and the conventional method removes the heavy metal ion the effect.
Essential character:Galvanization
waste water floc test heavy metal
1. Experimental content Use NaOH using REMOVE MT and the convention to
carry on the processing galvanization waste water contrast experiment,
the experimental water sample for the scene random sampling,
separately obtains after the experiment best joins the quantity and
the processing step, and comparison test result content. 2. Original water water quality
situation Obtains the original water water quality target
after the examination as follows: (Unit: Mg/L) | Total Fe2+ | Ni2+ | Cu2+ | Zn2+ | PH | Total nitrogen | | 140.12 | 15.62 | 20.93 | 30.4 | 1.75 | |
In the original water the total metallic ion
content is: 207.07 mg/L. 3. Experimental plan 3.1 experiments the instrument PH meter, ORP meter, electrically operated mixer,
1500ml beaker 3.2 medicament preparations (1) 10% density caustic soda solution (2) 5% diluted concentration REMOVE MT (3) 10% sulfuric acid solution (4) 0.1% gathers the third thin amide solution 4. Testing sequence 4.1 uses REMOVE MT (1) takes waste water 1L; (2) joins about 10% sodium hydroxide 11.5 ml, adjusts PH
to 6.5 about; (3) joins 5% REMOVE MT (diluted concentration is 5%) 2.5
ml stirs responds 5 min; (4) joins 0.1% to gather third thin amide 0.3 ml fast to
stir 0.5 min, the idling speed stirs 1 min; (5) settles 3 min, is accepted after passing an
examination the serum to filter, in examination processing water heavy
metal ion residual density. Note:When experimental
definite REMOVE MT removes the heavy metal ionic reaction end point,
the ORP electric potential reduces to 60 millivolts (from + 180
millivolts to 120 millivolts). 4.2 uses NaOH (1) takes waste water 1L; (2) joins about 10% sodium hydroxide 16.78 ml, adjusts PH
to 10.0 about; (3) under PH=9.5, stirs responds 10 min; (4) joins 0.1% to gather third thin amide 1.0 ml fast to
stir 0.5 min, the idling speed stirs 1 min; (5) settles 3 min, on the serum filters, joins 10%
sulfuric acid solution 3.75ml, adjusts PH to 7.5; (6) examination after NaOH processing in water heavy metal
ion residual density. 5.test results In 5.1 processing water heavy metal ion
concentration contrast Unit: Mg/L | | Total Fe2+ | Ni2+ | Cu2+ | Zn2+ | PH | | Uses REMOVE MT | 0.0209 | 0.0185 | 0.002 | 0.0064 | 7.5 | | Uses NaOH | 0.35 | 0.26 | 0.4 | 0.162 | 7.5 (by PH9.5 opposing argument) |
5.2 adds the dose contrast Unit: Ml | | 10NaOHjoins the quantity | 5REMOVE MTjoins the quantity | 10H2SO4joins the quantity | 0.1gathers the third
thin amideto join the quantity | | Uses REMOVE MT | 11.5 | 2.5 | --- | 0.3 | | Uses NaOH | 16.78 | --- | 3.75 | 1.0 |
5.3 working costs analyze The market at present the medicament expense is
detailed as follows: H2SO4 98% 650
Yuan/tons NaOH 2,300 Yuan/tons REMOVE MT 15,000 Yuan/tons Gathers the third thin amide 12,000 Yuan/tons Two methods medicament expenses respectively be (process 1
ton waste water): Uses NaOH: 1.678×2.3 + 0.375×0.65 + 0.001×12 = 4.12 Yuan/ton processing water Uses REMOVE MT: 1.15×2.3 + 0.125×15.0 + 0.0003×12 = 4.52 Yuan/ton processing water 6. Generalized analysis Uses REMOVE the MT processing waste water,
although the medicament expense has the enhancement, but has the
following merit: (1) reaction time may reduce 1/2 about the time, the
processing water is limpid, the water leakage directly is the PH
neutrality; (2) reduces PH to return mediates the principle working
procedure; (3) settling reduces about 1/3, also settling structure
loose, is easy to filter, is not easy to stop up the mesh, may
lengthen cleans up filter press the cycle, simultaneously saves the
sludge processing expense. (4) through the ORP way, is easy to realize the treating
processes automatic control; (5) filters out in the thing the heavy metal ion not
instead to dissolve (under general acidic condition); (6) for processed the water sales commission to create the
condition. The generalized analysis uses REMOVE the MT processing
waste water, the processing expense should be compares the
conventional alkalizing processing way to have reduces. The
processing water completely satisfies the national standard to
discharge the request. (1)author introduces:
Male, Zhejiang Jiashan person, presently unit of work:
Jiasha County earth sewage treatment project limited company,
Zhejiang, 314,100. Tel:13067581282 | 