Aerobic biological filtration systems employing nitrifying bacteria to remediate excess ammonia and nitrite concentrations are common components of recirculating aquaculture systems (RAS). However, significant water exchange may still be necessary to reduce nitrate concentrations to acceptable levels unless denitrification systems are included in the RAS design. This study evaluated the design ...

In water scarce countries such as Eritrea, maintaining brewery industry remain ever challenging task. Currently, Asmara breweries is the only beer producing factory consuming 8.46 L of per every produced which notably higher than Brewer’s Association (BA) benchmark and consequently generates 7.53 wastewater/L beer. Bottle cleaning activities ascertain ample effluent bases. Wastewater from bottl...

Thermophilic aeration and electrochemical reactions are well-established methods for wastewater treatment to reduce metallic content, organic inorganic matter, turbidity, coloration, nutrient levels. In this study, thermophilic aerobic oxidation (TAO) electrocoagulation (EC) were implemented together improve the quality of liquid fertilizer by reducing load toxicity swine manure. The influent i...

Total suspended solids (TSS) are a major pollutant that affects waterways all over the world. Predicting the values of TSS is of interest to quality control of wastewater processing. Due to infrequent measurements, time series data for TSS are constructed using influent flow rate and influent carbonaceous bio-chemical oxygen demand (CBOD). We investigated different scenarios of daily average in...

We studied and quantified the elimination of sunflower oil from a wastewater influent using a biological treatment by activated sludge. Estimation of the biodegraded material was obtained doing a mass balance, and we conducted a follow-up of the different operational parameters and design. We delivered information about the operation of a system for treatment by activated sludge fed with an inf...

Step-feeding strategies have been extensively studied and comprehensively analyzed in this study for a four-stage alum sludge-based tidal flow constructed wetlands (AlS-TFCWs) system. Enhanced total nitrogen removal of 83% is achieved under high nitrogen loading rate of 19.1 g N/m(2)d. The key issues towards the success of a significant nitrogen removal in step-feeding TFCWs are the bed resting...

Field surveys often show that high water turbidity limits cover of aquatic vegetation, while many small-scale experiments show that vegetation can reduce turbidity by decreasing water flow, stabilizing sediments, and competing with phytoplankton for nutrients. Here we bridged these two views by exploring the direction and strength of causal relationships between aquatic vegetation and turbidity...

A fiber-based biofilm reactor was developed using a laboratory-scale apparatus for treatment of nitrate-contaminated groundwater. Denitrification bacteria were inoculated by anaerobic sludge from a wastewater treatment plant. Nitrate removal efficiency, nitrite accumulation, COD and pH in the treated water were investigated under various conditions set by several parameters including hydraulic ...

Anaerobic digestion (AD), the oldest technology used for treating waste, converts organic matter into biogas in absence of oxygen. The current efforts focuses on improving a local industrial wastewater to produce and treat water reuse. A lab-scale up-flow anaerobic sludge blanket (UASB) reactor operated at 37 °C was employed biodegradation wastewater. one-factor-at-a-time (OFAT) approach study ...