Updated: July 2002

1. Purpose

Kubota packed tower type bio deodorizer BIO GAS WASHER SYSTEM is a deodorizing method using immobilized microorganisms that the high decomposition activity for odor.
BIO GAS WASHER SYSTEM achieves high deodorization performance and remarkably saves maintenance cost and operation labors.

2. Typical Flow Diagram

1) BIO GAS WASHER
BIO GAS WASHER consists of a packed bed tower and a circulating water tank. In packed bed microorganisms such as sulfur oxidation bacteria or nitrifier are immobilized in media and odor is removed.
2) Active carbon absorber
Active carbon absorber polishes the effluent gas after BIO GAS WASHER.

3. Characteristics

1) High deodorizing efficiency
BIO GAS WASHER SYSTEM has more than 99% removal rate for the sulfur-containing odorants (hydrogen sulfide, methyl mercaptan, etc.) and the nitrogen-containing odorants (ammonia, etc.). Furthermore odor intensity of outlet is able to less than 2.0 by active carbon adsorber.
2) Reduced running cost
BIO GAS WASHER SYSTEM will be minimized in running cost than chemical or physical deodorization, especially in case of high concentration of odor.
3) Simple maintenance
BIO GAS WASHER is automatically operated and maintenance-free.
4) Smaller space
BIO GAS WASHER requires smaller space because deodorizing microorganisms that have the high decomposition activity are immobilized in media.

4. Application

1) Facility
Sewage treatment plants
Night-soil treatment plants
Various manufactures
2) Kind of odor
Sulfur-containing odorants
Nitrogen-containing odorants

5. Practical Experience

Kanazawa S.T.P. in Yokohama city
Nanbu S.T.P. in Fujisawa city
Hyogo Higashi ACE center
Oriental Yeast, Co., Ltd.
etc.

Comparison of Space