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Nowadays the speed of urbanization is fast in China. And the quantity of sewage discharged from cities and towns is increased year by year. When sewage is treated, a large number of complex components of sludge will be produced inevitably at the same time. If effective treatment is not taken up timely, it would became a direct or potential threat for environmental. In this article, we discuss several...
This paper studied the effect of microbial species grow speed(MPGS), soluble microbial populations(SMPs) on the excess sludge production in the oxic-settling-anoxic process (OSA process), a modification of conventional activated sludge process by inserting a sludge holding tank in a sludge return line. The OSA process may provide a cost-effective way to reduce excess sludge production in activated...
Brewery wastewater was treated by UASB (up-flow anaerobic sludge blanket)-CASS (cyclic activated sludge system)joint technology. After combination of wastewater (sewage)treatment structure design parameters, established a brewery wastewater treatment plant model, and explored the feasibility of brewery wastewater and optimization of wastewater treatment process selection. During the treatment by the...
Dying-printing wastewater is treated under micro-aerobic situation in IC reactor, the experiment uses 10%PAC and 0.05%PAM, with the ratio of the raw water to flocculent 400:1, after coagulating sedimentation, the biochemical performance of the wastewater is greatly improved, up to about 0.22; when influent loads is improved to about 4655.1mg/L, dissolved oxygen concentration 0.3mg/L and HRT 5h, the...
The impact of organic matter concentration on nitrification was studied in shortcut nitrification SBR. The results showed that the competition of aerobic bacteria had been enhanced and degradation rate of ammonia had been reduced in the system with the increasing of COD concentration and the loading of sludge. Denitrification in the system was apparent, removal rate of total nitrogen was increased...
Environmental pollution has become one of the most prominent problems in the world. In the present study, a PAH pollutant degrading bacterium NAPL was isolated from the activated sludge of a wastewater treatment plant in Zibo city, China, with the selective naphthalene-mineral salts medium. Morphological studies revealed NAPL was a short-rod gram negative bacterium. Physiological and biochemical experiments...
Tannery effluent (sludge, wastewater) is treated by natural way. The waste sludge has been taken for the following two experiments, namely Neutralization process and Ferric alum treatment process. The alkali chemicals neutralized by pyroligneous acid which is obtained by pyrolysis process of wood. This sludge is sent out for drying. The dried sludge contains some biological waste and other organic...
Biosorption of organic pollutants, expressed as COD, by aerobic and anaerobic sludge was conducted to examine equilibrium and kinetic models. Freundlich and Langmuir models were mostly used for mathematical description of the biosorption equilibrium. Freundlich equation was more fit to describe the equilibrium of biosorption process in this study. Under the same experimental condition, biosorptive...
According to the characteristics of contaminated surface water, a stain of Micrococcus sp. (Micrococcus sp. N3-9P) that could remove CODCr efficiently was picked out from the slowly flowing oil-polluted riverbed sludge in Liaohe Oil Field, and then it was immobilized by chemical embedding technology. Through the conditional tests of immobilizing parameters, an improved co-immobilization technique...
The discharge amount of the industrial wastewater and domestic sewage is increasing, resulting by the growth of the municipal sludge. The effective treatment of the sludge becomes a problem we need to solve. The sludge conditioning is the key procedure for treating and disposing the sludge. By summarizing the related documents and materials on sludge conditioning studied by the scholars from home...
In this paper, the domestication of the activated sludge by which nitrobenzene can be degraded in a relatively poor nutrition is studied. The ability of activated sludge degradation of nitrobenzene is studied by degradation kinetics. The toxicology validation about the effect of activated sludge degradation of nitrobenzene is preliminarily explored. The results show that: The nitrobenzene could be...
There is an increasing focus on the secondary pollution of a municipal sewage treatment plant. To illuminate the environmental load of a sewage treatment process, a life cycle assessment (LCA) of a case project in Harbin was proposed by combining the process-based life cycle inventory (LCI) and the input-output based LCI in one framework. For classification of the effect factors and characterization,...
This study has investigated the effect of humus soil activated sludge on the nitrogen and phosphorus removal. The results from experiments indicate that humus soil SBR (HS-SBR) process did not have a better effect on the COD removal compared it with SBR process. They had about 89% removal efficiency on average. HS-SBR process could enhance the removal of nutrient salt, especially TP. The removal efficiency...
The CASS technique was adopted for researching on the treatment of Domestic Sewage. The results showed that, in the stable operation phase of the test and under the conditions of setting operation parameters, the average removal rates of CODcr, BOD5, NH4-N, and TP were respectively 91.7%, 92.2%, 89.5% and 91.09%. The sludge remains highly active, and it had stable bio-facies. Effluent quality met...
The effect of an improved membrane bioreactor (IMBR) on COD, NH3-N and TN removal and membrane fouling alleviating was investigated through a comparative study with a traditional submerged membrane bioreactor (SMBR). The variations of trans-membrane pressure (TMP), concentration of mixed liquid suspend sludge (MLSS) and extracellular polymeric substance (EPS) was also conducted through the long-term...
According to the characteristics of oil contaminated wastewater, four strains of microorganism, named TA-11, TA-17, HA-9, HD-1, which can degrade oil and CODCr of oil contaminated wastewater were picked out from the oil contaminated soil and activated sludge of Panjin pitch plant wastewater treatment system. The research results showed four strains of microorganism can all remove oil and CODCr. in...
Microbial flocculants is a kind of metabolic products with flocculating activity being produced by microbes and secreted outside of cells, which is provided with characteristics as well as high-performance, non-toxic, no secondary pollution, being widely applied in the field of water treatment. Through summarizing the relevant domestic and overseas research literatures published in the recent years,...
Humus soil activated sludge (HSAS) process and conventional activated sludge (CAS) process of 400 L/day capacity were set up in lab to evaluate their performance. This study mainly focused on testing Nitrogen and phosphorus removal efficiency and settleability and dewaterability of sludge. The research shows that HSAS process could enhance the removal of nutrient salt, especially TP. It enhanced NH...
A pilot-scale anaerobic-anoxic-oxic (A2O) bioreactor with 125 m3ldrd-1 capacity was tested for treating real low strength municipal wastewater. The results showed that when the hydraulic retention time (HRT) was 9.6 h , the sludge retention time (SRT) was 15 d, the sludge recycling ratio (SRR) and mixed liquor recycling ratio (MLRR) were 0.5 and 1.5 respectively, the effluent could meet the first...
Notice of Violation of IEEE Publication Principles"Water Treatment Residuals (WTR) as Potential Filter Media for Pollutants Removal in Constructed Wetland"by Jianfeng Fu, Xiangdong Xuein the Proceeding of the 2nd International Conference on Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008, 16-18 May 2008, pp.2720-2723After careful and considered review of the content and authorship...
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