Manganese Zeolite

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Manganese Zeolite is most effective and economical iron removal
media ifrom Taiwan. It is commonly used for removing dissolve iron and
manganese from contaminated water. It also removes hydrogen sulfide
from deep Tube-well water., It is a purple-black filter media processed
from ceramic zeolite granule. Zeomangan can be used in a completely
closed pressure system with no aeration or repumping, or in an open
gravity filter system. To work well it is requiring more than 6.2 pH in raw
water. To get best performance, it require normal flow rate are 5-12
gpm/sqft. If higher iron contain, usually recommended lower flow rate
to get good result. Exceed recommended flow rate of 12 gpm/sqft
usually tolerated but a pilot unit need to require be operated to control
the effluent quality and run length. Raw water pH level require 6.2 or
higher to get best performance. If pH less than 6.2 then must be passed
through Manganese Zeolite with pH correction. So, finally we set the
rules as mandatory water having a pH lower than 6.2 should be pH
corrected to 6.2 – 6.5 before passing through the Manganese Zeolite. If
the case arises a pH higher than 6.5 is desired in the water system, the
additional alkali should be added after the filters due to the adverse
reaction.

Operating Condition
Backwash: Sufficient rate using treated water to produce approximately 30% bed
expansion.
Rinse: At normal service flow rate for 5 minutes or until the effluent is acceptable.
Capacity: 350 ~ 500 g/m2 of bed area based on potassium permanganate demand.
In addition to the required continuous regeneration a 70 cm minimum bed of specially sized. It is also required in
any case the pressure drop should not exceed 0.70 ~ 0.85
Kg/cm2.
General Notes
Raw water having a pH of 6.2 or higher can be passed through Zeomangan without pH correction; water having
a pH lower than 6.2 should be pH corrected to 6.2 – 6.5 before passing through the Zeomangan. If a pH higher
than 6.5 is desired in the water system, the additional alkali should be added after the filters due to the adverse
reaction (formation of a colloid) that sometimes occurs with the iron and alkali with pH over 6.5. KMnO4 solution
Strength – with continuous regeneration operation the KMnO4 can be any concentration up to 30 g/L.
Flow Rate
Normal flow rates with continuous regeneration operation are 5~12 m/hr. Higher concentration of iron and
manganese usually require lower flow rates for equivalent run lengths. Rates in excess of 12 m/hr can usually be
tolerated but a pilot unit should be operated to determine the effluent quality and run length.
The run length between backwashes can be estimated as follows:
Example : What is run length on a water containing 1.7mg/L iron and 0.3 mg/L manganese at 10m/hr operating
rate?
KMnO4 demand
= (1 x mg/LFe) + (2 x mg/L Mn)
= (1 x 1.7) + (2 x 0.3)
= 2.3 mg/L
At 500 g/m2 loading ÷ 2.3 mg/L = 217 m
At 10 m/hr service rate, 217/10 = 21.7 hr