organic wastewater Articles
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A study on ruthenium-based catalysts for pharmaceutical wastewater treatment
Ruthenium-based catalysts were prepared by a saturation-dip method. Their catalytic activity was evaluated by a catalytic wet oxidation (CWO) process. The ruthenium-based catalysts were used to purify organic pharmaceutical wastewater with high concentration pyridine and pyridine derivatives that have high chemical oxygen demand (COD). In the CWO process, organic pharmaceutical wastewater was ...
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Preparation of solid composite polyferric sulfate and its flocculation behavior for wastewater containing high concentration organic compounds
A new kind of inorganic polymer flocculant, the solid composite polyferric sulfate (SPFS) was prepared using ferrous sulfate and Na-Bentonite. The obtained SPFS was characterized by FT-IR spectra, thermogravimetric analysis (TG), scanning electron microscope (SEM) and X-ray Diffraction (XRD). It showed that SPFS was a kind of composite inorganic polymer, which was the complex of PFS and Na-Bent, ...
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The effect of mixed liquor suspended solids (MLSS) on biofouling in a hybrid membrane bioreactor for the treatment of high concentration organic wastewater
Biofouling is a crucial factor in membrane bioreactor (MBR) applications, particularly for high organic loading operations. This paper reports a study on biofouling in an MBR to establish a relationship between critical flux, Jc, mixed liquor suspended solids (MLSS) (ranging from 5 to 20 g L−1) and volumetric loading rate (6.3 kg COD m−3 h−1) of palm oil mill effluent (POME). A lab-scale 100 L ...
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Fouling and long-term durability of an integrated forward osmosis and membrane distillation system
An integrated forward osmosis (FO) and membrane distillation (MD) system has great potential for sustainable wastewater reuse. However, the fouling and long-term durability of the system remains largely unknown. This study investigates the fouling behaviour and efficiency of cleaning procedures of FO and MD membranes used for treating domestic wastewater. Results showed that a significant ...
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Organics removal and protein recovery from wastewater discharged during the production of chondroitin sulfate
Bentonite, chitosan and polyaluminum chloride (PAC) were applied to treat wastewater discharged during the production of chondroitin sulfate and recover protein dissolved in the wastewater. The results showed that the combination of pH 9.00, 3–4 mL chitosan solution, 2 g of bentonite and 5 mL of 8% PAC solution per 100 mL of wastewater with a 4.0 h flocculation time were the ...
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Overview of High-salt Wastewater Treatment Technology
The treatment of high-salt wastewater is a major environmental issue facing industrial development at this stage. Comprehensive utilization is an important way to solve the bottleneck of high-salt wastewater. The application of high-salt wastewater reuse technology is an important guarantee for achieving significant economic, environmental and social benefits. This article is based on the status ...
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Treatment of wastewater from a school in a decentralized filtration system by percolation over organic packing media
Based on results obtained in the laboratory a WWTP composed of a septic tank and an aerated percolating filter packed with organic media was built for a school. The system can treat 18 m3 d−1 and was operated with a hydraulic loading rate of 0.078 (m3 m−2 d−1). For 360 days different operational conditions including start-up; stabilization; operation with aeration and non aeration; effect of ...
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Case study - Mazzei aeration system eliminates odors from winery wastewater lagoons - Madera, CA
The Problem: A California winery was having odor problems from its wastewater evaporation lagoons. The wash and wastewater from this facility contain large amounts of organic matter. The wastewater is collected and pumped to two main lagoons for evaporation, percolation, and sprinkler irrigation. The high organic loading results in high BOD levels, and over time, the lack of oxygen in the ...
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The highest inhibition coefficient of phenol biodegradation using an acclimated mixed culture
In this study a membrane biological reactor (MBR) was operated at 25 ± 1 °C and pH = 7.5 ± 0.5 to treat synthetic wastewater containing high phenol concentrations. Removal efficiencies of phenol and chemical oxygen demand (COD) were evaluated at four various hydraulic retention times (HRTs) of 24, 12, 8, and 4 hours. The removal rate of phenol (5.51 kg-Phenol kg-VSS−1 d−1), observed at HRT of ...
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Ammonia Reduction By Bioremediation
Specially selected microbes treat poultry processing wastewater to reduce nitrogen and organic waste levels Petrox DN organisms reduced ammonia-nitogen and BOD levels in the same wastewater reactor. The organisms in Petrox removed 40% of the ammonia-nitrogen in 48 hours. This reduction stabilized the concentrations in wastewater effluent to an acceptable level eliminating permit ...
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Industrial Wastewater Treatment: Priority pollutant behaviour in on-site treatment systems for industrial wastewaters
The majority of wastewaters deriving from the chemical industry consist of aqueous discharges produced during the physico-chemical processing of synthetic mixtures involving operations such as filtration, centrifugation, extraction and/or distillation. The wastewater streams, referred to as ‘process waters’ can include mother liquors, washing waters from the purification of products, ...
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On-site industrial wastewater treatment
Priority pollutant behaviour in on-site treatment systems for industrial wastewaters The majority of wastewaters deriving from the chemical industry consist of aqueous discharges produced during the physico-chemical processing of synthetic mixtures involving operations such as filtration, centrifugation, extraction and/or distillation. The wastewater streams, referred to as ‘process ...
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Ammonia Bioremediation in Poultry Waste
Specially selected microbes treat poultry processing wastewater to reduce nitrogen and organic waste levels Ammonia bioremediation prevents waste problems at poultry p[roducers. Petrox DN organisms reduced ammonia-nitrogen and BOD levels in the same wastewater reactor. The organisms in Petrox removed 40% of the ammonia-nitrogen in 48 hours. This reduction stabilized the concentrations in ...
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