How to use HMB

For effluent treatment, purification of ocean, lakes, and marshes, and cultivation

1. For effluent treatment and cultivation

*1:Blowers are not capable of supplying sufficient oxygen in viscous water in which oxygen is insoluble, or in a tank with shallow water, causing a lack of oxygen!

*2:Microbubbles are generated,
improving the oxygen dissolution efficiency to 160%.

Water depth	Oxygen solubility(%) with blowers	Oxygen solubility(%) with HMB + blowers
1m	1.1	1.78
1.7m	2.7	4.5
2.7m	4	6.3

（Experiment data）

2. Features of micro/nanobubbles (fine air bubbles)

• ・Features of micro/nanobubbles (fine air bubbles)
• ・Finer air bubbles have low floating speed.
• ・Air bubbles of 10 µµm (micrometer) in diameter float at a rate of 2 mm/min.
• ・Air bubbles are negatively charged and absorb underwater suspended substances.

3. Utilization of fine air bubbles

• ・Microbubbles absorb fine dirt and oil: microbubbles have excellent absorptivity, especially to oil. By using them for cleaning, oil can be removed without using detergents.
• ・Oil repels water, but sticks to air: By collecting oil with bubbles on the surface of water and removing it, the clean water can be reused.
• ・Various properties: it is used in a wide variety of applications including factory effluent, water quality improvement in dams and ponds, hot springs, confectionery manufacturing, and sake brewing.

HMB system diagram

Test record

	Discharged water volume			Sucked air volume
	Water volume calculated based on the nozzle diameter and water pressure (error rate of 5% or less)		Actual measurement value	Actual measurement value of clear water, Straight pipe 1.5m, lift 0m
Pump water pressure （Mpa）	Nozzle diameter (mm)	Discharged water volume (ℓ/min)	Discharged water volume （ℓ/min）	Rated value （m3/h）	Actual measurement value （m3/h）
0.09	45.5	1,301		39	43
0.08	45.5	1,227	1,220	36.8	40
0.07	45.5	1,149		34.3	38

Submerged pump driving models	HMB pipe diameter from pump	Discharge pipe from HMB	Drive pump (kW)	Discharged water volume （m3/H）	Air suction volume （m3/H）
HMB27-C/D-2.2	65A SUS	80A	1.5~2.2	26~27	15~16
HMB58-C/D-3.7	80-100 SUS	100A	3.7	56~58	33~34
HMB72-C/D-5.5	80-100A SUS	125A	5.5	70~72	42~43
HMB130-C/D-7.5	100A SUS	150A	7.5	120~130	76~78
All models SUS304

Land pump driving models	HMB pipe diameter from pump	Discharge pipe from HMB	Drive pump （kw）	Discharged water volume （m3/H）	Air suction volume （m3/H）
HMB18-V-1.5	50A SUS	65A	1.5	17~18	10~11
HMB27-V-2.2	75A SUS	80A	2.2	26~27	15~16
HMB49-V-3.7	65A SUS	100A	3.7	47~49	28~29
HMB72-SL-5.5	80-100A SUS	125A	5.5	70~72	42~43
All models SUS304

Features (outline of the system)

What is the dispersed bacteria treatment system?

All the bacteria in a biological treatment tank are dispersed to treat water without forming flocs.HMB is an essential component of the system; it prevents floc formation and supplies oxygen efficiently.It does not require the usual aeration and settling tanks, and there is no return sludge.

Features

Increased treatment performance with dispersed bacteria (HMB + dispersed bacteria): system and features

1. Generated microbubbles increase the dissolved oxygen level at once (freshwater test, 9 mg/ℓ).
2. Powerful mixing effect enhances oxygen dissolving efficiency from blowers (internal test, 160%).
3. The BZ bacteria that are contained in the microorganism agent degrade carbohydrate, protein, and oil components efficiently.
4. It is fully aerobic and organic substances are turned into water and carbon dioxide, generating none of the odors that are associated with effluent treatment plants.
   （C_XH_YO_Z + O₂ → CO₂+ H₂O -⊿H）

Conventional activated-sludge method

Dispersed bacterial treatment system

Example of application

Introduction of the dispersed bacteria system

Treatment method: dispersed bacteria treatment system + pressure floatation treatment
Site of delivery: factory producing boxed lunches and prepared food for convenience stores (production volume: 100,000 packages per day)
Drainage volume: 300 m³/ day (discharged to sewage) Delivery point: Saitama Prefecture

Dispersed bacteria tank

Pressure floatation equipment
(floating tank)

Installation of HMB on land

	When cooking rice	During production of prepared food	Measurement tank	Pressure floatation
				Non-chemical injection	Chemical injection
BOD（mg/ℓ）	900	4700	310	120	7
COD（mg/ℓ）	380	5400	340	160	17
Hexane extracts （mg/ℓ）	140	610	36	7	<1
SS（mg/ℓ）	436	675	680	240	10
pH	6.15	6.2	6.69	6.96	6.62
EC（ms/m）	48.8	181.7	71.2	70.5	112.7

Comparison with the
conventional activated-sludge method

（*The cost comparison is based on our company’s data.)

	Dispersed bacteria treatment method	Conventional method
Facilities	Fewer facilities are required ・Untreated water tank→Biological treatment→(Coagulation separation)→Discharge ・There is no settling tank and return sludge ・Treatment of organic substances: dispersed bacteria ・Coagulation separation / membrane	Full facilities for the activated-sludge method are required ・Untreated water tank→Adjusting tank→Aeration tank→Settling tank→Discharge ・There is return sludge ・Treatment of organic substances: floc-forming bacteria ・Solid–liquid separation method / membrane
Features	Operation and maintenance is easy No problems occur →Management of instruments for measuring pH, DO, and ORP: reduced maintenance cost ・Fully aerobic⇒No odors are generated ・(Dispersed bacteria) Non-flocculated bacteria⇒more contact with substrate	Operation and maintenance is difficult Many problems (including bulking, load variation, and water temperature variation) Discharge of treated wate→olid–liquid separation technology requires the floc-optimization management: increased maintenance cost ・Anaerobic degree is high within the floc⇒malodor ・Formation of floc⇒more aeration volume than necessary Inefficient treatment
Operation and maintenance	Energy saving operation ・Amount of required air: amount of electricity is 2/3* ・Running cost: Simple management ・Sludge generation amount: reduced ・Initial cost: 50–60% of the conventional method* ・Total running expense: 65–75% of the conventional method*	High-energy operation ・Amount of required air is large⇒liquidity of floc: Large amount of air ⇒large amount of electricity ・Running cost: many problems occur, including bulking ⇒Agents are required to solve problems ・Sludge generation amount: approx. 40% of BOD* ・Initial cost: large area is required for the site

※Comparison within the company

Installation method

The basic design of the dispersed-bacteria treatment facilities is provided by HINODE SANGYO CO., LTD.
Refer to the HMB catalog for the drainage capacity of the microbubbles.
Contact us for the capacity of the installed HMB, as this is a matter of technical know-how.
Both underwater and land installation types are available. Consult us with your specifications.

Features

1. While the existing untreated water tank and adjusting tank play their respective roles as tanks, they can also double as aeration tanks.
   →The aeration tank volume is increased, improving the treatment performance
2. By adding the BZ bacteria^TM, the treatment performance of BOD and hexane extracts can be enhanced.
3. Activation level is increased by introduction of fine air bubbles in the latter aeration tank, enhancing the treatment performance.
4. With the BZ bacteriaTM + Youtry^TM added, oil balls can be eliminated.

HMB + ozone

Introduction of appropriate amount of ozone is known to generate the following features.

1. Decomposition of persistent substances (including fat and oil) is improved.
2. Decolorization is enabled by ozone oxidation.
3. Sterilization of liquid is enabled (locally).

Functions

When the production equipment of a factory is enhanced while the treatment performance of the effluent treatment facility remains insufficient, the treatment performance can be improved by adding the HMB between the untreated water tank and the adjusting tank instead of an aeration tank.
The outline of the installation is as shown in the diagram below.

How to use

Untreated water tank/adjusting tank
In a tank with shallow water, blowers are used for agitation
DO is insufficient as an aeration tank

HMB installation and introduction
The microbubbles turn the process into an aerobic one, and the treatment performance is improved with the BZ bacteria added.
(Sludge is not returned here)

Application examples

Practical examples of HMB installation

Practical example 1

Treatment method: HMB system (with the existing equipment modified)
Site of delivery: factory producing udon noodles for professional use
Drainage volume: 700 m³per day

A microbubble generator installed underwater

Fine bubbles are generated
and dispersion efficiency is increased

Practical example 2

Treatment method: HMB system + ozone treatment
Site of delivery: factory producing various types of Chinese food
Drainage volume: 400 m³per day (discharged to sewage)

A microbubble generator installed on land (top and bottom)

Comparison of treatment with BZ bacteria (NEO) only and with HMB in the food factory 1*

	Untreated water	Treatment with NEO only	Cutting rate	Treatment with HMB	Cutting rate
BOD	3000mg/ℓ	2000mg/ℓ	33%	1500mg/ℓ	50%
N-H	200mg/ℓ	120mg/ℓ	40%	100mg/ℓ	50%
SS	850mg/ℓ	900mg/ℓ	-	680mg/ℓ	20%

Comparison of treatment with microbubbles only and with HMB + BZ bacteria (NEO) in the food factory 2*

	Untreated water	Treatment with microbubbles only	Cutting rate	Untreated water	Treatment with HMB + BZ bacteria	Cutting rate
BOD	1300mg/ℓ	1100mg/ℓ	15%	1900mg/ℓ	860mg/ℓ	55%
N-H	170mg/ℓ	80mg/ℓ	52%	77mg/ℓ	32mg/ℓ	58%
SS	720mg/ℓ	610mg/ℓ	15%	900mg/ℓ	450mg/ℓ	50%

Installation method

The basic design of the dispersed-bacteria treatment facility is provided by HINODE SANGYO CO., LTD.
Refer to the HMB catalog for the drainage capacity of the microbubbles.
Contact us for the capacity of the installed HMB as this is a matter of technical know-how.
Both underwater and land installation types are available. Consult us with your specifications.