Summary-
Over the last decade, the technologies for sewage treatment has seen the changes which are eventually helping the environment by treating the sewage and getting the consistent water quality to reuse while meeting the statutory norms as well.
The conventional technologies such as ASP, SBR, MBBR, MBBR+UF were used for sewage treatment predominantly before many of us started using the MBR technology. Which is considered as the best technology but at the premium cost.
Yes, it has been a revolution where the better water quality to use is the requirement and people started looking for reducing the fresh water intake/consumption.
Now many times it has been witnessed the understanding with advanced technology as MBR vs the Conventional treatment schemes is one of the deciding factors while selection.
We believe this article will put light on the understanding of difference while selecting the right solution in sewage treatment for recycle.
What is Membrane Bioreactor Technology?
The Membrane Bioreactor technology is one of the wastewater treatment technologies which is a combination of the Suspended growth biological treatment process along with membrane filtration.
The technology is used in Municipal as well as industrial wastewater treatment processes. It is an advanced technology that produces consistent high-quality water for reuse at a competitive cost.
• Highest water recovery >95-98%
• Consistency in meeting Statutory Compliances
• Performance Meeting BOD norms
• Minimal Footprint – less area requirement
• Operates at High MLSS-Highly stabilized
| SPECIFICATIONS | TREATMENT SCHEMES | ||||
| Activated Sludge Process (SBR) | MBBR (Moving Bed Bioreactor) |
MBR (Membrane Bio Reactor) |
|||
| Process Type | Suspended Growth | Attached Growth | Biological +Filtration | ||
| Area Footprint | Maximum | Moderate | Minimal | ||
| Treatment Efficiency (COD,BOD,TSS) | 80 – 90 % (Reduction) |
90- 95 % (Reduction) |
98% (Reduction) |
||
| Water quality & Consistency | Low quality & Consistency | Moderate quality & Consistency | Excellent quality with high consistency | ||
| Required level of manual intervention | Medium | High | Low | ||
| Electro-Mechanical & Civil Cost | High | High | Moderate | ||
| Maintenance | Difficult | Difficult | Easy | ||
| Water Recovery | 75– 80 % | >85 % | >95 % | ||
| Electrical Consumption | Medium | Moderate | Moderate | ||
| Sludge handling | Required periodic sludge wasting, Intern frequent sludge handling, equipment usage. | Required periodic sludge wasting, Intern frequent sludge handling, equipment usage. |
Highly stabilized sludge reduces sludge handling equipment footprint | ||
| Table-1 Above Table explains the comparative understanding between conventional treatment technologies with the MBR technology | |||||
| Sr No. | Description | UOM | Outlet Parameters | ||||||
| Design Basis |
MBR | MBBR+UF | |||||||
| 1 | Flow | KLD | 150 | 150 | 150 | ||||
| 2 | Recovery | % | >95 | > 95 | ~ 90-95 | ||||
| 3 | pH | - | 7.5 – 8.0 | 7.5 – 8.0 | 7.5 – 8.0 | ||||
| 4 | Total Suspended Solids | ppm | 250-350 | < 5 | ~ 5-10 | ||||
| 5 | BOD | ppm | 250-400 | < 5 | ~ 5-10 | ||||
| 6 | COD | ppm | 300-600 | < 30 | ~ 30 | ||||
| 7 | TURBIDITY | NTU | - | <1 | <1 | ||||
| Table-2 Describes the design basis condition & results in compassion of MBBR+UF & MBR | |||||||||
| Sr. No. | Description | UOM | MBR | MBBR + UF | |||||
| 1 | Capacity | KLD | 150 | 150 | |||||
| 1.2 | Electro-Mechanical Cost | INR | 4037000 | 3925000 | |||||
| 1.3 | Appx Civil Cost | INR | 3600000 | 4500000 | |||||
| 1.4 | Total Capex Cost for STP | INR | 7638000 | 8425000 | |||||
| 2 | Electricity Consumption | ||||||||
| 2.1 | Connected Load | KWH | 29.5 | 36.4 | |||||
| 2.2 | Operating Load | KWH | 16 | 19.2 | |||||
| 3 | Chemical Consumption | ||||||||
| 3.1 | Sodium Hypochlorite | Kgs/day | 7 | 10 | |||||
| 3.2 | Citric Acid | Kgs/day | 5 | 5 | |||||
| 3.3 | Alum | Kgs/day | Not required | 1.5 | |||||
| 3.4 | Polymer | Kgs/day | 0.8 | 0.8 | |||||
| 3.5 | DAP | Kgs/day | Not required | Intermediate Usage | |||||
| 3.6 | UREA | Kgs/day | Not required | Intermediate Usage | |||||
| 3.7 | Jaggery | Kgs/day | Not required | Intermediate Usage | |||||
| 4 | Treatment Cost | ||||||||
| Operating Cost per day for STP | |||||||||
| 4.1 | (Only Electricity, Chemical Consumption) | INR/Day | 834 | 934.6 | |||||
| Treatment Cost per m3 | |||||||||
| 4.2 | (Only Electricity, Chemical Consumption Considered) |
INR/m3 | 5.64 | 6.23 | |||||
| 5 | Maintenance of the plant | Easy | Tedious | ||||||
| 6 | Space Requirement (L x W) | Sq.mtr | 13.5 x 6 | 18.5 x 6 | |||||
| Illustrative working in compassion of MBBR+UF & MBR with technical design, sizing's, power, chemical and commercial indication including civil | |||||||||
Table-4 Represents how MBR technology helps in reducing the area footprint. Secondary Settling tank (Tube settler) & further tertiary treatment gets eliminated as Separation of solids & Filtration happens in the Membrane Bioreactor Tank itself.
Note-This case study for MBBR + UF V/Ss MBR of capacity 150 KLD with standard calculation & our assumptions based on experience.
What Is STP INBOX
Aquacare's MBR STP In Box system is a packaged/containerised system, compact energy optimised solution includes high performance MBR technology for sewage treatment produces clear water to reuse. MBR STP In Box system consists of biological treatment, MBR for filtration sludge handling system and disinfection. Tanks, piping's, pump & blowers designed to suits the sewage application.
Operation
Aquacare's MBR STP In Box system is designed to provide biological and filtration system to treat sewage. The system can achieve 96% recovery with
treated water quality of BOD <10ppm, TSS<5 ppm and Turbidity <1 NTU. Treatment Capacity-Aquacare's MBR STP In Box system is available in capacities as 5 KLD, 10KLD, 20 KLD & 30 KLD Box Size- 20-40 Ft
Key Features & Benefits
• Compacts System
• Plug & Play
• Suitable - Fixed & Temporary usage
• Meets Regulatory Requirements
• Cost efficient in Capex & Opex
• Robust Design - with minimal maintenance
• Easy to change in location as per requirements
Advantages
• Environment Friendly - Meeting discharge norms
• Less Time for Installation - Ready to USE
• Handling emergencies
• Low Maintenance & Operating costs
Applications
• Commercial IT Parks
• Residential complexes, Towers
• Hotel & Restaurants, Hostels, Institutions, etc
• Shopping malls, airports.
• Hospitals & healthcare centers
• Industries
Your email address will not be published. Required fields are marked *
