The figure revealed the electrodes arrangement and AC and DC system in reactor, and the experiments condition which performed in laboratory temperature.

Effects of aluminum-/iron-based coagulant addition on sludge anaerobic digestibility, dewaterability, and odor emission

In this study, it is aimed to investigate the applicability of the electrooxidation process on the decolorization of real textile wastewater using four different anodic materials. Platinized titanium (abbreviated as platine; in fact, it consists of a titanium electrode covered with a nano-layer of platinum), ruthenium dioxide (RuO₂), titanium dioxide (TiO₂), and graphite was tested for their anodic contribution, noting that TiO₂ electrode was used as a cathode. Operating parameters such as pH, applied current, and electrolysis time were systematically optimized using the response surface methodology (RSM) with the Box–Behnken experimental design (BBD) to obtain the highest color removal efficiency.

The Sm-doped GO-KSrPO₄ nanocomposite synthesized using ultrasound-assisted method is able to efficiently photodegrade methylene blue dye mainly at a higher Sm³⁺ concentration, photocatalyst loading, and pH and a lower initial dye concentration.

Effective electrochemical oxidation and different membrane filtration systems were applied for the treatment of yarn fabric dyeing wastewater in terms of COD, color, salinity and conductivity removals. The Use of reverse osmosis membrane demonstrated relatively complete removal of color concentration and 98% of COD elimination. The obtained water could be recycled back to the process in that way offering economic profits by decreasing water consumption and wastewater treatment cost.

To assess the impact of the some pesticides on the Kurose River, Japan, an integrated approach combining monitoring, assessment of environmental toxicity and human risk was used. Cyanazine was the most commonly detected, followed by simetryn and diazinon. Average concentrations of the selected pesticides were generally higher in spring followed by summer, autumn and winter. The study showed that there were unacceptable environmental toxicity risks for diazinon, cyanazine, simetryn and fenarimol, while the environmental risks for isoprothiolane were low. For adults and children, the risk was highest for diazinon, while isoprothiolane showed the lowest risk to humans.

In this work, laboratory scale constructed wetland (CW) was designed for the treatment of domestic waste water. The performance evaluation of CW planted with Paspalidium flavidum was recorded at different temperatures and retention times. Various physico-chemical parameters were analyzed and the treatment efficiencies were recorded as COD (59.7–65.6%), TDS (59.6–76.8%), TSS (64.9–76.7%), and turbidity (72.7–91.6%), respectively.

The artificial-controllable urban river (ACUR) constructed to form five artificial eco-systems by planting three emergent hydrophytes and Microcystis aeruginosa was used to investigate the behavior and removal of six antibiotics.

Life-cycle assessment (LCA) study was completed to analyze the environmental impacts of four treatment options to treat wastewater in a fruit processing industry. The best environmental option was MBR, followed by RO and UV, which allows for water recycling. Treating water at a municipal wastewater treatment plant mitigated eutrophication but resulted in more environmental impacts with on-site treatment systems.

The synthesis of mesoporous Ti-Al mixed oxide from TIP and AIP and its application in flouride removal from waste water wherein the optimization is done using a L25 Taguchi design. Due to the mopholoical variation in Ti-Al mixed oxide depending on the composition of oxide, a variation in adsorption capacity is expected.

Conventional activated sludge was converted into a hybrid granule-floc process by external gravimetric selection. Wasting excess sludge through hydrocyclone overflow enabled a controlled shift of biomass morphology and progressively enriched granulated proportions, eventually leading to breaking the interannual bulking cycle and stabilizing year-round SVI low values.

The acute toxicity level test using Tilapia fish was done to determine the toxicity effect of treated effluent after the coagulation-flocculation process by SnCl4 as a coagulant and JC seed as a flocculant. The results revealed that the fish tested with treated leachate using SnCl4 as a coagulant and JC as a flocculant were more viable and resistant compared to fish tested with raw leachate.

The mass balance of biosolids from a complex biosolids management area was predicted using random forest and multiple linear regression models, with random forest achieving the best results.

PFAS identifiable byproducts and unidentifiable byproducts.

ECO addition could cleanup TCE-contaminated groundwater via adsorption and anaerobic dechlorination mechanisms.

Little is known about E. coli in stormwater, yet recreational use of stormwater areas is allowed in many countries. We assessed stormwater retention ponds and detention basins to understand spatial and temporal changes in E. coli and the genetic sources of the E. coli.

The figure shows a schematic view of the conventional UASB reactor, and to improve the performance of the reactor, development of granules should be given more importance. To make the granules suitable for the reactor, start-up has to be initiated. Furthermore, factors affecting performance of the reactor were also discussed. To improve the performance furthermore, various modifications of UASB by imposing variations in configuration were tried. It also shows schematic view of EGSBR and SGBR (derivatives of UASB).

The presence of an aerobic bacterium could be relevant for accelerating VA hydrolysis, and archaea of the Methanosarcina genus are an important player on VA elimination. This evidence proposes the following route of elimination of VA with methanogenic sludge fed with oxygen, which arises from the mass balance of both batch and continuous assays.

In this study, a combination of O3/ZrCl4 and O3/SnCl4 in SAL treatment was investigated. Three factors were varied; dosage of ZrCl4 and SnCl4, pH of sample and reaction time. The performances were evaluated based on colour, COD and BOD5/COD ratio. O3/ZrCl4 was the best combination that effectively removed COD and colour, up to 91.9% and 99.6%, respectively, and improved the leachate biodegradability in terms of the BOD5/COD ratio.

Nitrogen concentration of influent and effluent in Phase Ⅰ and Ⅱ.

Mixing leachate with a higher percentage of young leachate should be employed to achieve better organic matter removal in on-site operations when conditions are available and the mixing strategy can be legally permitted.

Fresh pond water harboured MDR, biofilm producing E. coli. Frequent resistance to tetracycline, cephalosporins and quinolone was noted. Majority were ESBL producers and a few belonged to virulent (B2/D) type.

PPCP removal in WWTFs varies by compound, treatment design, and operation including solids retention time.