What are the Two Types of Wastewater?

Wastewater is a by-product of all commercial operations. Some wastewater can be reused, while other types must be treated to remove harmful bacteria before they are released back into the environment. This article discusses the two different types of wastewater: greywater and blackwater.

What is greywater?

Greywater is produced in households from dishwashing, laundry, bathing, and bathroom sinks; it’s largely untreated wastewater that does not contain faecal matter or toilet paper. It’s a relatively clean form of wastewater, though it still needs treatment before it can be reused.

What is blackwater?

Blackwater is a more contaminated form of wastewater that comes from toilets, as well as referring to wastewater that is created during industrial processes. Blackwater is contaminated with hazardous material and therefore requires more complicated and thorough processing before it can be reused.

The uses of treated greywater vs blackwater

Because of the different levels of contamination present in greywater and blackwater, these two different kinds of wastewater are usually reused for different purposes. Greywater is typically reused for agricultural or household purposes, while blackwater is usually treated to be recycled back into industrial processes.

How are these wastewater types created in commercial environments?

Wastewater in commercial environments is created as a result of people and industries using water; greywater will be created in similar ways to the home, by staff and customers using sinks and washing facilities, while blackwater can come from toilets as well as any sources of hazardous waste that can’t be disposed of down standard sinks and drains.

Greywater vs blackwater treatments

WastewaterBecause of the extra level of contamination present in blackwater, treating blackwater for reuse is somewhat more complicated and expensive than treating greywater.

Greywater can be reused in gardens with little to no treatment, while indoor greywater use (for flushing toilets and washing clothes) can be accommodated by treating greywater with relatively simple filtration systems which are designed for filtering out large particles, breaking down organic matter, and disinfecting the greywater.

Blackwater is generally only recommended for outdoor use even when it’s been treated. The most common method of treating blackwater in Australia is using an Aerated Wastewater Treatment System (AWTS), which can largely clarify the blackwater, removing solids and sludge, as well as breaking down organic matter and usually disinfecting it with chlorine (or, in some cases, UV).

Aerated Wastewater Treatment Systems are a great way to treat both commercial blackwater for outdoor reuse and commercial greywater for indoor reuse.

Why is it important to reuse commercial wastewater?

Businesses and industries, just like homeowners, should be thinking about both their bank accounts and the environments when looking for innovative ways to reuse commercial wastewater. By using systems that allow for the reuse of water, businesses can both act in a way that is more environmentally friendly – a key concern of many consumers today – and save money on water bills in the long term.

Who are we?

Eco-Septic is a Sydney based manufacturer and specialises in commercial wastewater systems of various shapes and designs. We can provide fast and free quotes relevant to your commercial wastewater needs, all while keeping in mind individual spending capabilities. Contact us today for a fast quote at 1800 808 135 or visit us at www.ecoseptic.com.au.

We cover all Sydney suburbs as well as the regions of South Coast, Snowy Mountains, Southern Highlands, Riverina, Blue Mountains and Hawkesbury, Laguna, North and Mid North Coast, Bateman’s Bay, Nowra, Mallacoota, Narooma, Balmora, Cobargo, Glenn Ines, Avondale, Glenmore, Mogo, Tarago, Torrumbarry, Albury, Faulconbridge, Maraylya, Sherbrooke, Strathdickie, Little Hartley, Linden, cattail, Bowen Mountain, Murwillumbah, Kyogle, Bryon Bay, Lismore, Evan Heads, Yamba, Grafton and surrounding areas.