Chemical Coagulation: An Effective Treatment Technique for Industrial Wastewater

Industrial sector is a backbone of the economy throughout the world. Despite that there are a lot of benefits; such as development of urbanization, major contributor in economy’s growth is sign of industrial development. There are a lot of adverse effects on environment including depletion and damage of our natural and precious resources. Textile, cement, paper and pulp, sugarcane, food, pharmaceuticals, chemical, paint and other industries are largest consumers of the freshwater; for meeting the requirements of industrial production requirement for the industrial sector for their production. As a result the discharged huge amount of water in form of highly polluted water, this is a great threat to our ecosystem. The unplanned industrialization is a prime responsible for degradation of environment. If industrial wastewater is not properly treated instantly, it may create foulest and septic conditions in adjacent parts of the industrial areas. The discharges acute poisonous wastewater by different industries is responsible for reduction of penetration in crops, and severely affects aquatic life. There are many treatment techniques such as coagulation, adsorption, membrane, biological etc. by different research studies disclosed that coagulation with different chemicals alum, ferric chloride, lime, PACl, PVA and ferrous sulphate are very effective for remove of pollution. The industrial wastewater creates several problems such as health problems, aquatic life including water pollution. In this paper reviews the chemical coagulation treatment technologies for industrial wastewater.

Production Forecast of China’s New Energy Passenger Vehicles in 2021–2023 under the Compliance of Dual-Credit Policy

The corporate average fuel consumption (CAFC) and new energy vehicle (NEV) credit policy (2021–2023) was officially released in June 2020. As a mandatory regulation for automobile manufacturers to produce new energy vehicles, its impact on the output of new energy vehicles needs to be systematically evaluated. In this study, we build an enterprise policy compliance model to simulate the dual-credit policy requirements for the production of new energy vehicles from 2021 to 2023 under different scenarios. The results show that the production of new energy vehicles from 2021 to 2023 is required to reach 1.78 to 3.97 million under different scenarios. Three factors, i.e., switching from New Europe Driving Cycle (NEDC) to World Light Vehicle Test Procedure (WLTP) fuel consumption improvement of conventional vehicles, and credit per new energy vehicle, have a more significant impact on the new energy vehicle production than others. Under the minimum guarantee scenario, a 10% change in the above three factors will lead to a 2.5%, 1.5%, and 0.5% reduction in the production requirement for new energy vehicles.

DYNAMIC MODELING OF THE SUPPLY PROCESS AND LOAD DISTRIBUTION IN A CLEANING PRODUCTS FACTORY

In the present work a dynamic model is evaluated, the process of transfer of cleaning products in the expedition warehouse, the delay times present in the process and the adequacy of the flow of load and discharge with the rhythm of production. production of four different plants. This evaluation allows to determine the availability of the transport units according to the production requirement and to avoid the accumulation of the trips. As you can see, from the study of the times, 58.47% time is the product and 41.53% the time lost in the delays, on the other hand, it is considered feedback between the production plan and the process of transfer of finished product in the transport units, allows to determine in the complete system: production - loading and unloading of the stages of the process to hinder the continuous flow of the product and likewise to determine the real capacity of the transport units required. The main contribution of the present work is to determine by means of the simulation the percentage of compliance of the units of transport from the product requirement and analysis of the current capacity; this contributes to the decision making to implement improvement solutions, in this case, evaluated in two proposals: eliminate idle time and feed back the system for the availability of transport units with the requirement of the production program. Keywords: Process, system dynamics, production, delays, scenarios, improvement solutions, distribution

Design and Analysis of a Clamping Plate for Automobile using Press Tool

The objective of the work is to design and analysis of a press tool for component clamping plate which is used in automobile to meet the production requirement of 2,00, 000 components for an automobile. To achieve this press tool having combination of operations like blanking, piercing and bending is designed for producing a clamping plate in a single stroke in two stages and to optimize production rate and manufacturing cost. Based on features in the component, compound die is designed which can perform blanking and piecing operation in first stage followed by bending operation in the second stage. The structural analysis was carried out for the forming dies and punches which shows that both the deflections and the stresses are well within the limits.

Properties of Gobi Aggregate and Sulfide-Rich Tailings Cemented Paste Backfill and Its Application in a High-Stress Metal Mine

This experiment studied the influence law of the strength of CPB affected by tailings content, Gobi aggregate content, cement content, and slurry concentration. The results show, for the CPB with concentration of 77%, when the addition amount of cement reaches 20%, the addition amounts of tailings and Gobi aggregate change within the ranges of 12∼24% and 56∼68%, respectively. The strength of CPB has been gradually improved when the addition amount of Gobi aggregates decreases and the addition amount of tailings increases. In this case, the slump of CPB changes within the range of 26.5 cm∼26.9 cm while the strength of CPB changes within the range of 4.021∼6.845 MPa. Considering future utilization value of tailings, the addition amount is finally set at 16% in production, and the addition amount of Gobi aggregate is set at 64%; namely, tailings: Gobi aggregate = 20 : 80. When the addition amount of cement is 20% (cement/(tailings + Gobi aggregates) = 1 : 4), the strength of CPB reaches 5.62 MPa which meets the production requirement. When the heading machine is used for tunnelling mine roadway in bottom backfill of VCR stope, no collapse or delamination occurs without support, showing good stability and integrity of backfill. When the adjacent stope ore is mined, the backfill with cement content of 11.1%, 14.3%, 20%, and 25% is exposed. In the process of mining, no collapse or delamination occurs. Therefore, the proportion of various backfill materials applied in production is reasonable, being verified by the experiment and field test.

Non-diabetic ketoacidosis associated with a low carbohydrate, high fat diet in a postpartum lactating female

ABSTRACT A 31-year old non-diabetic woman presented to our hospital with symptoms of dehydration, drowsiness, fatigue, shortness of breath and vomiting present for two consecutive days prior to admission. She had started a low carbohydrate, high fat (LCHF) diet to induce weight loss while breastfeeding her 4-month-old child 2 weeks prior to admission. The patient was found to have a severely high anion gap metabolic acidosis. It was determined to be due to ketoacidosis, which was as a result of carbohydrate restriction in the presence of increased metabolic demands related with the synthesis and secretion of milk. She denied alcohol use or ingestion of any drugs prior to admission. The patient underwent dialysis and received insulin, 5% dextrose water alongside a well-balanced diet with adequate calories. All abnormal laboratory results normalized and follow-up visits were done. Lactating women are at risk of developing ketoacidosis due to high metabolic demands of the body to produce milk. LCHF diets may exacerbate the body’s demand to meet its milk production requirement and result in ketoacidosis. Health professionals need to be aware of the complications of LCHF diet in this population to prevent mortality associated with this condition.

Effect of Altitude on the Phenology and Fruit Quality Attributes of Apricot (Prunus armeniaca L.) Fruits

Consumer concern about poor taste of fresh apricots is increasing and knowledge about the more suitable production requirement is essential. Genetic component influencing apricots quality is well known. However, there is limited information on environmental effect on fruit quality. This study aims to evaluate influence of altitude on phenological and fruit quality characters of apricot genotypes. Fruits from 162 genotype were collected from nine locations from 3006-3346 m asl in trans-Himalaya. The altitude had a marked influence on date of flowering, fruit weight, moisture and TSS content. For every 100 m increase in altitude, flowering and fruit ripening delayed by 3.3 and 7.1 day, respectively. Inverse relationship between altitude and fruit weight (R2=0.310) was observed. For every 100 m increase in altitude the fruit weight decrease by 0.5 g. Fruit moisture content decreased significantly with increase in elevation (R2=0.585). Decrease in moisture content was 1.9% for every 100 m increase in elevation. Altitude showed linear relationship with fruit TSS content (R2=0.726). For every 100 m increase in altitude, the fruit TSS increased by 1.2ºBrix. Knowledge from the present study on the impact of altitude on fruit quality characters provides a useful guide for selecting orchard location towards improving fruit quality

A Practical Method for Detecting Fluff Quality of Fabric Surface Using Optimal Sensing

The raising process has been widely used in manufacturing fabric productions. After raising the surface of the fabric, productions are covered with a fluff layer. The quality of the fabric surface is often valuated by the fluffing type. In order to objectively assess the fluff quality of the fabric surface, an optimal sensing method is proposed in this paper. The fluff contour image was firstly collected by the light-cut imaging device. Then, the fluff region was segmented by the adaptive image segmentation method, the contour coordinates of the fabric were extracted using the freeman chain code and constructed in the form of the binary image. Lastly, a back-propagation neural network (BPNN) was used to learn the relationship between the contour coordinates and the fluff quality. On this basis, a practical fabric fluff detection platform was developed based on the optimal sensing technique. Experimental tests were conducted to evaluate the performance of the proposed method in detecting the fluff quality with four different colours and different fluffing processes. Furthermore, the actual fabric inspection was carried out. The detection correct rate can reach 94.17 %, which can meet the practical production requirement.

Potential and Scope of Additive Manufacturing in Aerospace Industry with Reference to India

Aerospace industry is one of the fastest growing industries in the world. Especially in India, it is estimated to grow in exponential rate owing to the rapid globalization and the fact that India is one of the world centres for tourism and trade. This exponential growth in the field of aerospace industry puts more demand on manufacturing and design of aircraft and its components. Unfortunately, the tradition method on spare parts production for aerospace industry cannot supply the growing demand to its fullest because it is time consuming and the cost of production is very high. Additive manufacturing, being one of the most revolutionary methods of is an appropriate substitute for the traditional manufacturing process in the aerospace industry as mass production becomes cheaper and save much of time. It also provides the flexibility to change the design and manufacturing method of any particular component with most ease at any stage from design to production. Additive manufacturing displays unarguable traits compared to traditional manufacturing in material saving, cost of production, requirement of skilled labour force and time consumption, especially in aerospace industry. However, there is not one single method of designing or producing the required component and this paper intends to classify and discuss each method in details and in comparison with each other. Few methods that are discussed in this paper include EBM, SLM, MD and LMD. In spite of the overwhelming advantage the technology has over the current method, it still faces few challenges to be fully implemented in floor level which is also focused in this paper in particular to India.