Connect with us
background

News

Waste seashells can solve waste water problem

Published

on

The thousands of tonnes of waste seashells created by the edible seafood sector could be put to use by the University of Bath’s Department of Chemical Engineering in a new waste water cleaning project.

Dr Darrell Patterson, who leads the Nanostructured and Tuneable Materials laboratory at Bath and is a Senior Lecturer (Associate Professor) in Chemical Engineering at the University, used waste mussel shells to create a cheaper and more environmentally friendly way of ‘polishing’ waste water, which could be used to remove unwanted substances like hormones, pharmaceuticals or fertilisers.

Traditional wastewater treatment broadly takes three stages. The first involves the removal of any solids and oils, the second filters the water and degrades the biological content of the sewage which are derived from human waste, food waste, soaps and detergent.

Finally a tertiary treatment is used to further improve the quality of the water before it is released. There are different methods of tertiary treatment, and one of the most effective is the photocatalysis of water to remove any final trace contaminants.

This process normally uses titanium dioxide which is expensive. By replacing this with a material from the calcium derived from seashells called hydroxyapatite, which can also be found in teeth and bones, Dr Patterson is aiming to significantly reduce the cost and reusing a renewable unwanted waste product.

Dr Patterson said: “Mussel and other seashell farming is a fast growing industry around the world and the increase in the production of shellfish generates a large amount of shell waste.

“Shells are a calcium rich resource that can be used to produce calcium oxide (lime). This lime can be used in several different ways in environmental technologies, and our study has shown that the hydroxyapatite formed from them is an effective, green and potentially cost-efficient alternative photocatalyst for waste water treatment.”

The research was carried out using mussel shells, but other types of seashell could feasibly be used to produce photocatalysts, making this technique globally applicable.

The project will now go on to look at the wider applicability of this technology and the scaling up of shell-based photocatalysts to industrial level.

The University of Bath are building a large portfolio of water-related research, having recently announced a new partnership with Wessex Water.

For more information on this area of research you can follow @DrDAPatterson on Twitter or access the full text research paper in Opus.

 

Source: www.bath.ac.uk

Marine Life & Conservation

Join us in supporting Dive Project Cornwall Crowdfunder Project

Published

on

Do you have a moment to help protect our oceans?

We’re on a mission and have partnered with DIVE PROJECT CORNWALL to help protect our oceans for future generations to cherish and enjoy.

DIVE PROJECT CORNWALL is a unique EDUCATION and EXPERIENCE initiative, reaching over 3,000 schools with their Ocean Education Programme, inspiring the next generation to protect our oceans for everyone to cherish and enjoy.

At the heart of the project is a competition for 400 lucky teenagers to win the EXPERIENCE of a lifetime. They will take the learning from the classroom straight to the shores of Porthkerris on a 6-day, life changing trip where they will learn to scuba dive and be taught the importance of marine conservation. They will become ‘Ocean Influencers’ for the future.

DIVE PROJECT CORNWALL needs our help.

Can you join us with a gift to DIVE PROJECT CORNWALL?

Whether it’s £5 or £50, a gift from you to the DIVE PROJECT CORNWALL Crowdfunder Project will help their vision of protecting our oceans through the innovative experience designed for school children.

Will you join us and pledge to support 400 lucky teenagers learn from and EXPERIENCE the ocean like never before and give them an EDUCATION they can use to inspire others, not forgetting the memories that will last a lifetime?

For more information, you can read the DIVE PROJECT CORNWALL story HERE.

Help us create the next generation of Ocean Influencers with a donation to DIVE PROJECT CORNWALL and ensure our oceans (and planet) are protected for the future.

WWW.CROWDFUNDER.CO.UK/P/DIVE-PROJECT-CORNWALL

Continue Reading

Marine Life & Conservation

Spring jellyfish blooms bring turtles to UK shores

Published

on

Marine Conservation Society’s wildlife sightings project asks beachgoers to share their discoveries and contribute to research

The Marine Conservation Society’s long-running wildlife sightings project focuses on two key species which arrive on UK shores: jellyfish and, as a result, turtles. Both species are vital in supporting ocean biodiversity and are indicators of climate change while being at risk from its impacts.

The charity is asking beach and seagoers to share when they spot either of these marine animals to support ongoing research.

During spring and summer, jellyfish arrive in the UK’s warming waters to feed on plankton blooms or, in fact, anything small enough to get caught. To that extent, jellyfish feed not only on plankton, but also the array of eggs and larvae of fish, crustaceans, starfish and molluscs which rely on plankton as a stage of reproduction.

With healthy fish stocks and rich biodiversity, jellyfish quickly become part of an effective food chain. Everything from tuna to turtles will feed on jellyfish of various sizes, so the population is well controlled. Supported by a rich and diverse ocean ecosystem, jellyfish link the microscopic world of plankton to larger marine animals and the ocean around them.

Jellyfish are especially appealing for marine turtles. Six of the world’s seven marine turtle species have been spotted in UK seas as a result of jellyfish blooms in spring and summer.

The largest sea turtle, and the most common in UK seas, is the leatherback which has a ‘vulnerable’ conservation status. Reporting sightings of these incredible creatures will support the Marine Conservation Society and others in understanding their movements, potential threats and how to better protect them.

Amy Pilsbury, Citizen Science Project Lead at the Marine Conservation Society, said:“For more than 17 years, beachgoers across the UK have been contributing to scientific research by sharing their wildlife sightings with us. It’s a key part of our work and plays a vital role in better understanding and protecting our ocean.”

In 2014, with partners from the University of Exeter, the Marine Conservation Society published the first paper from the survey data, confirming key information about UK jellyfish and including the first distribution maps of the surveyed species.

Since the 2014 paper, the wildlife sightings project has recorded notable events such as massive and extensive annual blooms of barrel jellyfish and several summers of Portuguese Man o’ War mass strandings.

The charity continues to run its wildlife sightings project to see what happens to the distribution and frequency of mass jellyfish blooms over time. The data will help to explore any links jellyfish blooms have with big-picture factors such as climate change.

Jellyfish can be spotted year-round in UK seas, but larger blooms are more likely to appear in spring, lasting through until autumn. Jellyfish sighting records from 2021 suggest that compass jellyfish are the most common around UK shores, making up 36% of reported sightings.

Jellyfish species Percentage of sightings reported
Compass jellyfish 36%
Moon jellyfish 17%
Lion’s mane jellyfish 15%
Barrel jellyfish 14%
Blue jellyfish 9%
Portuguese Man o’ War 6%
Mauve stinger 2%
By the wind sailor 1%

For more information on how to identify jellyfish and turtles, and to report a sighting, please visit the Marine Conservation Society’s website.

Continue Reading

E-Newsletter Sign up!

Competitions

A luxurious dive resort in the heart of Lembeh Strait. Enjoy refined services while exploring the rich waters of Indonesia.

The resort is nestled around an ocean front deck and swimming-pool (with pool-bar) which is the perfect place to enjoy a sundowner cocktail at the end of a busy day of critter-diving.

All accommodation is full board and includes three sumptuous meals a day. Breakfast and lunch are buffet meals and in the evening dining is a la carte.

Book and stay before the end of June and benefit from no single supplements in all room types!

Booking deadline: Subject to availability – book and stay before end of June 2022

Call Diverse Travel on 01473 852002 or email info@diversetravel.co.uk.

More Less

Instagram Feed

Popular