BZB RED MUD Biogas

Waste Management for organic waste in Kenya is a problematic issue that needs stricter guidelines and initiatives for better and meaningful results. Waste water from Estates, cities, hospitals, schools and other institution. Effluent from food processing factories, slaughter house,are among the leading environmental pollutants in the country, especially in urban areas. That means proper waste disposal methods are necessary and should be enforced to deal effectively with the menace by ensuring that the institution is equipped with the proper waste disposal tools and mechanisms. BZB RED biogas system in Kenya spearheads this need as it manages and add value to the same waste.

Organic Waste is flushed using water through a drainage via coarse screening, grit removal and collected in the pretreatment tank, then mixed and blended by the mixer pumped into the Biozone digester for anaerobic digestion where biogas is harnessed. Organic matter is reduced over the process.The biogas can be used for heating room, cooking or electricity generation after purification. The slurry/effluent collected to the settling tank /clarifiers to separate settleable solids from the raw incoming waste water.Settled solid should be removed time to time treated using microbes, dried, packed or used as organic fertilizer.  Liquid effluent collected can also be used to irrigate, as foliar organic fertilizer

Process flow chart design of Commercial BZB RED Biogas System

BZB Models Comparison

Mainly including:

1. Screening, grit removal channel

This process involves removal of a large non-biodegradable and floating solids such as plastics, tins, containers. Its easily separates and remove large matter, rocks, grit, metals carried along way by raw water which might negatively affect the treatment procedures.

2. Mixing tank/Pre-treatment Tank

Volume depends on waste availability;

Sub structure – masonry walls or reinforced concrete depending on material availability

Water supply required for easy dry matter wetting to required water to dry matter ratio

Purpose is to offer space for filtering, stirring and mixing the slurry to the required texture.

3. Digester tank

Sub structure – masonry walls or reinforced concrete depending on material availability

Purpose is to hold and to protect the red mud biogas digester as shown.

4. Biozone RM-PVC biogas collection equipment

Material: Red Mud pvc

capacity of digester: depend on waste available or gas required

Specification of  biogas collecting/ harnessing material

Material: 100% Polyester, Thickness: Medium Weight, 0.7-1.8mm, Type: Mesh Fabric

Pattern: Coated, Style: Plain, Woven, Technics: woven

Feature: Heat-Insulation, Tear-Resistant, Waterproof, UV Protection, Acid, Alkali and Salt Corrosion Resistance

Coated Type: PVC Laminated

Density: 20*20 or Customized, Color:  Red mud, Tensile Strength: 2600-4500 or customized

Tear Strength: 300-1000 or customized, Working Temperature: -25℃~70℃

Advantages of Biozone RM-PVC Digester Bags

• Easy to operate and maintain, low cost for running it.
• Stable ability for anaerobic digestion.
• Easy and quick to install, long life span to over 15years.
• The digester bag can be folded, easy to transport, save the transport cost.
• Ultraviolet light resistance
• Can be done in scalable units of 10m3, 50m3 or 100m3.

4. Sludge Tank

Volume required – depend on waste estimated to be overflowing from the plant

Sub structure – masonry walls or reinforced concrete depending on material availability

Purpose – to retain the effluent after digestion

EQUIPMENT FOR THE BZB RED BIOGAS SYSTEM

Mixer equipment

Used for; stirring and mixing the slurry to the required texture

Advantage; lowers intensive labor required to mix and to remove the unwanted debris in the same waste.

Feeding pump with cutter (installed in the pre-treatment tank)

Used to feed the mixed slurry to the digester some time grinding it to required texture.

lowers the intensive labor required to feed the digester.

Circulating pump

Used to pump sludge/ slurry with optimum bacterial activity to the mixing tank to inoculate the new feed.

This accelerates the biogas production.

Biogas purification equipment

Used to remove the biogas impurities like hydrogen sulfide, water (steam) and carbon dioxide.

Biogas storage balloon

Used to offer biogas extra storage

Biogas pump.

Used to optimize the gas pressure

Biogas pipe and fitting

Used to convey the gas to storage and to the transducers

Biogas transducers /consumption points

Converts Biogas to heat energy, electrical energy. They includes

1. Commercial burners

2. Boilers

3. Brooders

4. Generators

AREAS OF APPLICATION

1. Biogas production Small- and large-scale poultry farmers

2. Biogas production Small- and large-scale cattle farmers

3. Biogas production Small- and large-scale pig farmers

4. Biogas production & waste management for Food processing factories

5. Biogas production for human waste in Institutions such schools, universities, churches, jails

6. Biogas production for Slaughter houses waste

7. Estates and cities sewer treatment management and biogas production