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Wastewater Treatment for Administrative Buildings

Intelligent Wastewater Treatment
for the Modern Workplace

Reliable, Automated, and Space-Saving Systems for Corporate and Government Estates.
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On-site sewage treatment for office buildings, government estates, public service centres and business campuses — buried or containerised, 1 to 1,000 m³/d, with PLC control, remote monitoring and genuinely unattended operation.
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Government Offices Corporate Offices Public Service Centres Office Parks & Campuses

Which Wastewater System Fits Your Site?

Series Best For Daily Capacity Process Installation
Mejec Scavenger A single villa, guesthouse or remote restroom 5–10 people CASS Compact standalone unit, solar-ready
Mejec Johkasou-SA One building, an annexe or a small facility 1–5 m³/d MBBR + clarifier + disinfection Fully buried — surface stays usable
Mejec Johkasou-SB A building cluster, canteen or mid-size site 20–100 m³/d AAO + MBBR Buried or ground-mounted
Mejec JM Series Whole-site treatment, water reuse targets, high-ammonia or industrial streams 50–1,000 m³/d per unit, combinable to 10,000 MBR / MBBR · MABR · industrial · seawater RO Containerised, plug-and-play, relocatable
Mejec Pump Station Sites that cannot drain to the sewer by gravity 480–18,960 m³/d · flow 20–790 m³/h Collection and lifting Buried barrel, Ø1.2–6.5 m
Not sure which capacity you need? Send us your daily flow or the population the site serves, the buildings you need to cover and your local discharge standard — we will size the system and quote within 24 hours.
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Workplace Wastewater Solutions

On-Site Wastewater Treatment for the Forward-Thinking Enterprise

In today's world, environmental stewardship is not just a regulation—it's a core component of corporate and public responsibility. The wastewater from your office facilities, from restrooms to cafeterias, represents an opportunity to demonstrate leadership and make a tangible impact. Our Mejec sewage treatment systems are engineered specifically for the scale and demands of office campuses, government buildings, and corporate headquarters. We go beyond simple compliance to deliver a solution that is as efficient and intelligent as your operations.
On-site wastewater treatment system for a corporate office estate
Government office building sewage treatment plant installation

Mejec Government Office Building Sewage Treatment Plant Solution

Government office buildings generate stable volumes of domestic wastewater from daily administrative operations. Mejec sewage treatment plant (STP) systems are designed to provide reliable and efficient wastewater treatment with consistent performance. Through integrated biological treatment processes and compact system design, the system ensures effective pollutant removal and compliant discharge. Mejec solutions support clean, well-managed environments for public administration facilities.
SB20–SB100 · 20–100 m³/d AAO + MBBR process 0.72–1.74 kWh per m³ treated Φ2.2 × 5.3–11.5 m 3–9 t Buried or ground-mounted

Mejec Corporate Office Building Wastewater Treatment Solution

Corporate office buildings require dependable wastewater treatment systems to manage daily sewage from employees and facility operations. Mejec wastewater treatment systems deliver stable performance and efficient purification through advanced treatment technology. Designed for multi-floor buildings and high-occupancy environments, the system ensures continuous operation and compliant discharge, supporting sustainable and professional workplace environments.
SB20–SB100 · 20–100 m³/d AAO + MBBR process 0.72–1.74 kWh per m³ treated Φ2.2 × 5.3–11.5 m 3–9 t Buried or ground-mounted
Corporate office building wastewater treatment system
Public service centre sewage treatment plant handling variable visitor loads

Mejec Public Service Center Sewage Treatment Plant Solution

Public service centers experience high visitor traffic, resulting in fluctuating wastewater volumes throughout the day. Mejec sewage treatment plant (STP) systems are engineered to handle variable loads with stable and efficient performance. Using integrated treatment technology, the system effectively treats domestic wastewater and ensures compliant discharge, helping maintain clean and hygienic public service environments.
50–600 m³/d per unit Combinable to 10,000 m³/d UV disinfection kills 99.9% of bacteria Effluent BOD₅ 10 · NH₃-N 5 · SS 5 mg/L Faecal coliform ≤50 CFU/100 mL 6–17 kW Carbon and stainless steel, acid and corrosion resistant

Mejec Office Park & Business Campus Sewage Treatment Plant Solution

Office parks and business campuses generate large-scale domestic wastewater across multiple buildings and shared facilities. Mejec sewage treatment plant (STP) systems are designed for centralized wastewater treatment with high capacity and stable operation. The system efficiently manages wastewater from offices, public areas, and service facilities, ensuring consistent water quality and compliant discharge while supporting sustainable campus development.
≤1,000 m³/d 70–75% less aeration energy Simultaneous nitrification and denitrification Built for high ammonia-nitrogen loads Low sludge yield Parallel units for linear expansion Enclosed — minimal odour escape
Office park and business campus centralised sewage treatment plant

Specifying building services for a workplace project?

We manufacture in our own 30,000 m² plant and supply developers, facilities groups, EPC contractors and distributors across 40+ countries.
  • Process customisation — CASS, AAO+MBBR, MBR, MBBR or MABR selected to match your influent
  • Factory prefabrication cuts the project timeline by roughly 30–50%
  • MOQ 1 unit — sample and trial orders welcome · Lead time 15 days
  • Certifications: CE · ISO · NSF · UL · GCC · factory ISO 9000
  • 100+ proprietary patents, including 17 core invention patents
  • Regional exclusivity available for qualified partners
  • PLC control cabinets with SMS and WeChat alarm push, remote monitoring and QR-code service history
  • 20+ years in water treatment · own 30,000 m² plant · supplying 40+ countries
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Why Mejec

  • Environmental compliance icon
    Environmental Protection and Compliance
    Every system is engineered to the discharge standard that applies at your site, with disinfection built into the treatment train rather than bolted on afterwards.
  • Contaminant removal icon
    Efficient Contaminant Removal
    Mature biological processes strip organics, suspended solids and ammonia nitrogen from the stream, and hold that performance when load and water quality fluctuate.
  • Low operating cost icon
    Operational Cost-Effectiveness
    Factory prefabrication removes most of the civil works, and optimised processes keep both energy draw and sludge disposal down across the life of the plant.
  • Scalable modular capacity icon
    Adaptability and Scalability
    Choose the process to suit your influent, then add modules in parallel as demand grows — capacity expands without rebuilding what is already running.
  • Water recovery and reuse icon
    Resource Recovery and Reuse
    Treated effluent is clean enough to put back to work for irrigation, flushing and landscape water, instead of being discharged and paid for twice.
  • Automated control and remote monitoring icon
    Automation and Low Maintenance
    PLC control with remote monitoring, fault alarms and unattended operation, so a site stays compliant without a dedicated operator on the payroll.

Where It Fits in a Workplace Estate

  • Government office building with an on-site sewage treatment plant
    Government Estates
    Steady weekday flow, a strict compliance record to keep, and public scrutiny of both.
    Johkasou SB →
  • Corporate office building wastewater treatment installation
    Corporate Offices
    No facilities team to spare, and a building services budget that is already committed.
    Johkasou SB →
  • Public service centre sewage treatment plant for fluctuating visitor loads
    Public Service Centres
    Visitor numbers that swing hard through the day and again through the week.
    Containerised MBR →
  • Business campus centralised wastewater treatment container
    Business Campuses
    Several buildings, one discharge point, and an ESG report that has to say something specific.
    Containerised MABR →

Frequently Asked Questions

Can an office building really treat its own sewage on site?

Yes, and for estates without a municipal connection it is often the only route. A 20 m³/d buried Johkasou SB is a Φ2.2 × 5.3 m cylinder installed below the car park or landscaping; a business campus would typically use containerised MBR units at 50 to 600 m³/d each, combinable up to 10,000 m³/d.

How much staff time does it take to run?

It is designed to need none. The PLC control cabinet supports manual, automatic and remote modes, protects against overload, short circuit and phase loss, automatically identifies inflow and switches the blower to an energy-saving mode, doses chemicals based on pH, and pushes alarms by SMS or WeChat. Maintenance history is stored behind a QR code on the cabinet.

What can we claim in an ESG or sustainability report?

Concrete figures rather than intentions. Buried Johkasou units consume 0.72 to 1.74 kWh per cubic metre treated. The MABR range cuts aeration energy by 70 to 75% against conventional blower aeration. Treated effluent at BOD₅ 10 mg/L and suspended solids 5 mg/L can be reused for landscape irrigation and toilet flushing rather than discharged.

Will it disturb the working environment?

Buried units sit in a sealed underground environment that isolates noise and odour, so they can be installed directly under courtyards and parking. Containerised units are enclosed and minimise odour escape; the MABR variant is quieter still because it supplies oxygen through a membrane rather than blowing air through the tank.

Our plant room is below the sewer line — what then?

Use the LD-BZ integrated prefabricated pumping station. Pipework, pumps, control gear, screen system and maintenance platform are integrated into a single buried barrel from Ø1.2 to 6.5 m, covering 480 to 18,960 m³/d at flows of 20 to 790 m³/h.

Tell us about the building, and we will size the system.

Send your occupancy, the buildings you need to cover and your local discharge standard for a system proposal, or ask about partnering with Mejec in your market. Pick Product or Distributor at the top of the form below — we reply within 24 hours.

If you have any questions, please feel free to leave us a message

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Tel: +86 19951100272 E-mail: mejec@lidinghb.com Add: Artificial Intelligence Industrial Park, Suzhou, China.
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