How to manage sewage and effluent
Sewage and effluent are terms used to describe human and/or animal waste.
The treatment and disposal of this waste is controlled by the legislative obligations of the Health Act (1956), the Building Act (1991) and the Resource Management Act (1991).
Package treatment systems, constructed wetlands or a combination of both are the options available to treat wastewater (sewage and effluent).
Why use constructed wetlands to treat wastewater?
Constructed wastewater treatment wetlands use natural processes to treat and dispose of wastewater in a way that is cost effective, clean and safe, enhancing the environment. Often wetlands can be used as public amenities, for recreation and wildlife habitats.
These wetlands can treat wastewater from:
The purpose of treating wastewater is to remove the waste contaminants and improve the quality of the water. The level of treatment required is determined by the types of waste contaminants to be removed. The treatment process consists of three main stages, primary, secondary and tertiary
Which constructed wastewater treatment wetland to use?
Constructed Wetlands systems can be designed as a complete treatment in their own right or they may be incorporated as separate process units dealing with the secondary and tertiary treatment within an existing treatment system. They can also either be described as Surface-flow wetlands (waters flow across and largely above the substrate surface) or Subsurface-flow wetlands (flow is directed below the substrate surface, vegetated submerged bed).
A key component of a constructed treatment wetland is the planted vegetation (wetland plant species). A function of this vegetation is to create additional environments for microbial populations. The effectiveness of this is dependent on the selection and planting of the appropriate wetland plant species.
The choice as to when a constructed wetland will be used in the treatment process, which type to select and the choice of wetland plant species, depends on the location, treatment objective and the land surface area available.
How Wetland Solutions can help
Wetland solutions is experienced with the principles and techniques of on-site wastewater treatment systems. We work with new and existing systems in domestic, commercial and rural situations. We are able to advise and/or select the most cost effective and efficient system appropriate to your needs and legislative requirements.
- Site assessments and feasibility studies
- Consent processing
- Construction supervision, and commissioning.
- Plant supply and planting
- Weed and Pest Control
- Monitoring and maintenance