Assessment and improvement analysis of economic production, water pollution, and sewage treatment efficiency in China

2020 ◽  
pp. 100956
Author(s):  
Zhen Shi ◽  
Zhiyu She ◽  
Yung-ho Chiu ◽  
Shijiong Qin ◽  
Lina Zhang
Keyword(s):  
Water Pollution ◽  
Sewage Treatment ◽  
Treatment Efficiency ◽  
Economic Production ◽  
Production Water

Cleaning Streams in Cook County, IL: Forest Preserves, Water Pollution, and Interwar Environmentalism in the Chicago Region

2021 ◽  
pp. 153851322110462
Author(s):  
Natalie B. Vena
Keyword(s):  
Water Pollution ◽  
Sewage Treatment ◽  
Cook County ◽  
Public Works ◽  
Metropolitan Region ◽  
The Public ◽  
Staff Members ◽  
American Cities ◽  
Forest Preserves ◽  
Forest Preserve

In 1916, the Forest Preserve District of Cook County began acquiring land to create a natural retreat for Chicagoans in that booming metropolitan region. Since district officials acquired many properties along county streams, water pollution soon interfered with their mission of creating an urban wilderness for recreational pleasure. To address the problem, in 1931, county leaders appointed the Clean Streams Advisory Committee that collaborated with forest preserve staff members to pressure polluters to clean-up their operations and to persuade enforcement agencies to prosecute ongoing offenders. They also lobbied the Public Works Administration to earmark New Deal funding for sewage treatment in Cook County. Their efforts suggest that early activism against water pollution in American cities emerged not only from efforts to ensure clean drinking water, but also struggles to protect nature. The interwar campaign to clean forest preserve streams anticipated the goals of the federal Clean Water Act (1972) to make all American waterways fishable and swimmable. The movement also preceded the burst of anti-pollution activism that historians have documented in U.S. suburbs after WWII and laid the groundwork for postwar efforts to mitigate water pollution in Cook County.

scholarly journals Evaluation of Contribution of Drainage from Sewage Treatment Plants to Water Pollution Based on the Amount of Urobilin in Rivers.

Eisei kagaku ◽  
1993 ◽  
Vol 39 (5) ◽  
pp. 401-408
Author(s):  
YUICHI MIYABARA ◽  
KEIKO SAKAMOTO ◽  
JUNZO SUZUKI ◽  
SHIZUO SUZUKI
Keyword(s):  
Water Pollution ◽  
Sewage Treatment ◽  
Sewage Treatment Plants

Development and Application of ASP Flooding Produced Fluid Demulsifier

2014 ◽  
Vol 556-562 ◽  
pp. 603-606
Author(s):  
Qing Ji Wang
Keyword(s):  
Particle Size ◽  
Crude Oil ◽  
Environmental Pollution ◽  
Oil Recovery ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Sewage Treatment ◽  
Oil Extraction ◽  
Treatment Efficiency ◽  
Asp Flooding

Alkaline/surfactant/polymer (ASP) flooding has been applied to oil extraction in Daqing oilfield in several years. It is a great technology to improve oil recovery after polymer flooding. However, the agent would produce lots of fluid compositions, including a lot of polymer, alkaline and surfactant chemicals, which can improve the output of crude oil but increase the difficulty to disposal, such as fluid emulsion serious, smaller oil bead particle size and higher sewage viscosity and so on. An efficient demulsifier is urgent researched. In the paper, some development and application of common emulsifiers were introduced, including Quaternary ammonium salt of demulsifier, Amine polyether demulsifiercess and Water-oil separation agent Drows-1. It is significance to research the efficient green environmental protection demulsifier, which will decrease environmental pollution and increase sewage treatment efficiency in future.

Research on Removal Performance of Integrated Biological Aerated Filter to Sewage Treatment

2011 ◽  
Vol 271-273 ◽  
pp. 357-362
Author(s):  
Xiu Ju Duan ◽  
Qiang He ◽  
Ya Li Liu
Keyword(s):  
Small Volume ◽  
Sewage Treatment ◽  
Influence Factors ◽  
Biological Aerated Filter ◽  
Treatment Efficiency ◽  
Research Focus ◽  
Volume Loading ◽  
Treatment Performance ◽  
Aerated Filter ◽  
High Treatment

Biological Aerated Filter has many advantages, such as small volume, high treatment efficiency, etc. This research focus on sewage treatment performance of Integrated Biological Aerated Filter (IBAF), have test under different conditions; research on affections of such influence factors as aeration, CODCr volume loading, HRT, temperature, the height of fillers layer on IBAF, and optimize its functional parameter; discuss regularities of sewage treatment of IBAF under different oprating conditions, adopt feasible measures to guarantee its exceed water quality.

Rethinking sewage treatment by enhancing primary settling with low-dosage lime

2005 ◽  
Vol 52 (10-11) ◽  
pp. 185-192 ◽  
Author(s):  
R. Ramadori ◽  
D. Marani ◽  
V. Renzi ◽  
R. Passino ◽  
A.C. DiPinto
Keyword(s):  
Sewage Treatment ◽  
Complete Removal ◽  
Primary Treatment ◽  
Treatment Efficiency ◽  
Crossflow Filtration ◽  
Physical Separation ◽  
Size Fractions ◽  
Sludge Digestion ◽  
Coagulation Tests ◽  
Low Dosage

This work presents a thorough fractionation of COD in raw sewage, followed by pilot plant coagulation tests with low-dosage lime (pH 9). Through a physical separation (sieving and crossflow filtration) total COD in the raw sewage was partitioned among eight size fractions in the range of 150–0.02μm. In addition, respirometric tests were performed to measure the biodegradability of the different size fractions. More than 60% of COD was associated with settleable and supracolloidal particles (size >1μm), which are characterised by slow biodegradability. Coagulation with lime increased COD removal efficiencies in the primary treatment from typical 30–35%, up to 65–70%, suggesting that lime may induce the almost complete removal of the slowly settling, slowly biodegradable supracolloidal particles in the primary treatment. On the basis of these results a non-conventional sewage treatment scheme is proposed, considering that there is plenty of space for improving primary treatment efficiency through sewage coagulation. Higher primary treatment efficiency may present several advantages, including lower aeration energy in the subsequent biological unit and higher energy recovery from sludge digestion.

Co-treatment of septage in a municipal sewage treatment pond system

2002 ◽  
Vol 46 (9) ◽  
pp. 315-321
Author(s):  
B. Kurup ◽  
R. Kurup ◽  
K. Mathew ◽  
G. Ho
Keyword(s):  
Fecal Coliform ◽  
Treatment Options ◽  
Sewage Treatment ◽  
Municipal Sewage ◽  
Treatment Efficiency ◽  
Oil And Grease ◽  
First Order ◽  
Pond System ◽  
First Order Kinetics ◽  
Total Capacity

This paper deals with the characteristics and treatment options of septage. The objective of the paper is to evaluate the effects of co-treatment of 50 MLD of septage in a sewage treatment pond system. The treatment efficiency of the pond system for BOD5 and Fecal Coliform (FC) has been estimated using a first order kinetics model. The model has predicted that the treatment pond system has a maximum capacity of 8.5 MLD and will have a reserve of 28.3% of its total capacity even after the proposed addition of 50 MLD of septage. Separation of oil and grease from septage prior to discharge into the pond system is recommended.

scholarly journals Cross-Regional Comparative Study on Environmental–Economic Efficiency and Driving Forces behind Efficiency Improvement in China: A Multistage Perspective

2019 ◽  
Vol 16 (7) ◽  
pp. 1160 ◽  
Author(s):  
Xionghe Qin ◽  
Yanming Sun
Keyword(s):  
Environmental Economic ◽  
Economic Efficiency ◽  
Driving Forces ◽  
Data Envelopment Analysis Model ◽  
Multistage Process ◽  
Analysis Model ◽  
Treatment Efficiency ◽  
Economic Activities ◽  
Economic Production ◽  
Pollution Treatment

Environmental–economic efficiency assessment is an effective way to evaluate the degree of coordination between an economy and the environment. Previous studies on environmental–economic efficiency have primarily investigated the efficiency of economic production and have often overlooked the efficiency of pollution treatment in overall economic activities. We applied a network data envelopment analysis model to evaluate the environmental–economic efficiency of a multistage process with undesirable outputs in 30 Chinese provinces during 2001–2017. The multistage process consisted of two sequential stages: economic production and pollution treatment. The results show that the average environmental–economic efficiency across all provinces was generally low but demonstrated a gradual upward trend during the study period. The spatial pattern for the 30 provinces showed that provinces with medium or high environmental–economic efficiency are mainly located in the eastern regions in China. Finally, few provinces exhibited economic activities with high economic production and pollution treatment efficiency, with most provinces generally having low economic production and pollution treatment efficiency. Hence, provinces with different economic production and pollution treatment efficiency modes should implement targeted improvement strategies according to their characteristics.

Sign in / Sign up

Export Citation Format

Share Document