Hazardous wastewater treatment by low‐cost sorbent with in situ regeneration using hybrid solar energy‐electrochemical system

Abstract

Hazardous industrial wastes negatively impact the environment by creating issues for aquatic as well as human's life. This study investigates the treatment of hazardous industrial wastewater using cost-effective graphite adsorbent along with electrochemical regeneration integrated with renewable solar energy. The synthetic industrial effluent containing crystal violet dye was treated using an adsorbent (Nyex™ 1000) having a surface area of 1.0 m 2 g −1 . The efficiency of removing solute was found to be more than 90%. The adsorbent regeneration efficiency was achieved at 99.5% by passing a charge of 100 C g −1 at current density of 10 mA cm −2 for 1 h. Solar energy was integrated with electrochemical reactor for the regeneration of adsorbent to make the system cost-effective and self-sustainable. © 2021 Water Environment Federation • Practitioner points• Industrial hazardous wastewater treatment with a cost-effective graphite integrated adsorbent. • Development of renewable solar energy-integrated with electrochemical system for regeneration. • Regeneration efficiency of adsorbent Nyex™ 1000 was achieved around 99.5% with integrated system. • Sustainable system was introduced to incorporate with renewable energy for waste water treatment.

Microbial Electrochemical Systems and Membrane Bioreactor Technology for Wastewater Treatment

“…Industrial wastewater and domestic sewage contain substances that are hazardous to both humans and the environment [1,2]. More than 90 % of the 1.7 million deaths per year attributable to contaminated water occurs in developing countries [3,4].…”

“…Due to the heterogeneous nature of suspended solids and active microorganisms in mixed liquid suspended solids (MLSSs), membrane fouling is still an unsolved problem for MBR systems in the long term [16,22]. Moreover, MES is still subject to several significant limitations, Siti Mariam Daud 2 Zainura Zainon Noor 1,2, * Noor Sabrina Ahmad Mutamim 3 Nurul Huda Baharuddin 1 Azrul Nurfaiz Mohd Faizal 4 Azmi Aris 2 Rabialtu Sulihah Ibrahim 1 -1 such as low power output, membrane fouling, high cost, short lifetime, and limited energy efficiency.…”

Recyclable NiO/sepiolite as adsorbent to remove organic dye and its regeneration

“…Much attention has been paid to alternative regeneration techniques in recent years. These techniques include microbial regeneration 8 , wet oxidation processes 9 , chemical regeneration 10 – 12 , solvent regeneration 13 , microwave-assisted regeneration 14 , electrochemical regeneration 6 , 15 , 16 , solar regeneration 17 , and thermal regeneration 18 . Clearly, the above reports have strongly demonstrated general and very effective strategies to improve the regenerative performance.…”