In this study, surface water samples from the Wenyu River and the North Canal, effluent from major wastewater treatment plants (WWTPs) in Beijing, and wastewater from open sewers that discharge directly into the river system were collected and analyzed for 16 priority USEPA polycyclic aromatic hydrocarbons (PAHs). Concentrations of these 16 PAHs ranged from 193 to 1790 ng/L in river surface wat...

this study aims to inspect the performance of the wastewater treatment system of the pars oil refinery. quantity and quality of wastewater are determined through samplings and measurements. the performance of system is evaluated considering total suspended solids, total dissolved solids, phosphate, chemical oxygen demand, biochemical oxygen demand, ammonia nitrogen, furfural, oil and ph. for pr...

Unprecedented economic achievement in China has occurred along with rising resource consumption and waste productions levels. The goal of sustainability requires the decoupling of economic growth from resource consumption (resource decoupling) and environmental degradation (impact decoupling). For this paper, the performances of resource decoupling (energy and water) and impact decoupling (wast...

The mercury (Hg) content of dental-operatory wastewater has become an issue in many localities, and Hg removal is rapidly becoming a matter of concern for all dental clinics. This preliminary study tested the efficacy of polymers for the removal of Hg contaminants from the dental-unit wastewater stream. Two commercially available polymers were used to treat dental-operatory wastewater. Used sep...

Currently in many cities and rural areas of Vietnam, wastewater is discharged to the environment without any treatment, which emits considerable amount of greenhouse gas (GHG), particularly methane. In this study, four GHG emission scenarios were examined, as well as the baseline scenario, in order to verify the potential of GHG reduction from domestic wastewater with adequate treatment facilit...

This paper reports the results obtained during an investigation aimed at transferring to the demonstrative scale an aerobic granular biomass system (SBBGR--Sequencing Batch Biofilter Granular Reactor) integrated with ozonation for the efficient treatment of tannery wastewater. The results show that the integrated process was able to achieve high removal efficiencies for COD, TSS, TKN, surfactan...

In order to evaluate the feasibility of installing decentralised installations for wastewater reuse in cities, information about flows at specific spots of a sewer is needed. However, measuring intermittent flows in partially filled conduits is a technical task which is sometimes difficult to accomplish. This paper describes a method to model intermittent discharges in small sewers by linking a...

A. Wetlands-a definition 1 B. The need for this document 1 1. Increased interest in the use of wetlands for disposal of wastewaters 2 2. Prediction of future pressures on wetlands 2 3. Review of resource statutes 3 4. Promotion of constructed wetlands 3 5. Conflict with conservation? 4 C. Who should read this report and how is it structured? 5 II. ECOLOGICAL IMPACTS OF WASTEWATER DISCHARGES TO ...

This paper makes use of the revision of “Law on the Prevention and Control of Water Pollution” as a natural phenomenon, under the method of Difference-in-Differences to observe the effect of this policy on the reduction of industrial wastewater in Beijing-Tianjin-Hebei region. The research result shows that the implementation of the policy has certain promoting effect to reduce discharge of ind...