生态产品价值实现的理论意蕴、机制构成与路径选择

本文阐释了生态产品、生态产品价值和生态产品价值实现三个概念的内涵外延,论述了生态产品价值实现的理论基础,分析了当前生态产品价值实现存在的矛盾,并围绕如何推进生态产品价值实现,提出了建立生态产品调查监测、价值评价、保护补偿、经营开发以及价值实现保障等针对性机制举措,着力构建生态产品价值实现的闭环路径。     

豆制品废水一级厌氧法的处理工程

在豆制品生产过程中产生的高浓度有机废水，采用4000m^3一级厌氧（UASB）法处理杭州某豆制品厂1500m^3／d的豆制品废水，原水COD浓度为4000—6000mg／L，出水浓度降至300—400mg／L，COD去除率达到95％以上，满足三级排放标准的要求。沼气产量2700—3000m^3／d，用于燃烧加热原水。     

滇南地区农业环境及其优势农产品污染物含量状况浅析

对493个农业环境及优势农产品样品进行采样检测，除个别样品中的个别参数出现轻微超标外，其余均未超标，数据超标率仅0．3％，若按每个样品中一项参数出现超标即为不合格判定，则99．1％的环境样品，97．4％的农产品样品为合格。     

喷淋清洗在汽包清洗中的应用

介绍了汽包喷淋清洗、喷淋管的制作、安装及喷淋清洗的方法。对汽包喷淋清洗中所存在的问题和现象进行了讨论。     

工业锅炉烟气的生成与控制研究

详细分述了工业锅炉烟气各组成成分的生成机理 ,针对其产生原因 ,提出降低污染物生成量的措施 ,阐明了脱硫和除尘技术。在环保呼声日渐高涨的今天 ,为城镇中在用燃煤锅炉的继续使用提供了理论、实践依据     

3m×20m烘干机配用LFEF袋式除尘器的效果

介绍了在水泥生产中,用大型LFEF袋式除尘器代替电除尘器在大型烘干机上应用的实例。     

絮凝沉淀-H2O2/UV体系处理发制品废水的研究

研究了发制品废水经絮凝沉淀－H2O2／UV体系处理的可行性。结果表明，废水经处理后，COD去除率可达90％以上，色度去除率达100％，探讨了投药量、反应pH、反应时间等因素对COD去除率的影响，并比较了H2O2／F^2 、H2O2／UV、H2O2／Fe^2 ／UV三种体系的处理效果。     

φ3m×20m烘干机配用LFEF袋式除尘器的效果

介绍了在水泥生产中 ,用大型 L FEF袋式除尘器代替电除尘器在大型烘干机上应用的实例。     

Comparison of methods for quantitating Salmonella enterica Typhimurium and Heidelberg strain attachment to reusable plastic shipping container coupons and preliminary assessment of sanitizer efficacy

Salmonella serovars, one of the leading contributors to foodborne illness and are especially problematic for foods that are not cooked before consumption, such as fresh produce. The shipping containers that are used to transport and store fresh produce may play a role in cross contamination and subsequent illnesses. However, methods for quantitatively attached cells are somewhat variable. The overall goal of this study was to compare conventional plating with molecular methods for quantitating attached representative strains for Salmonella Typhimurium and Heidelberg on reusable plastic containers (RPC) coupons, respectively. We attached Salmonella enterica serovar Typhimurium ATCC 14028 and serovar Heidelberg SL486 (parent and an antibiotic resistant marker strain) to plastic coupons (2.54 cm²) derived from previously used shipping containers by growing for 72 h in tryptic soy broth. The impact of the concentration of sanitizer on log reductions between unsanitized and sanitized coupons was evaluated by exposing attached S. Typhimurium cells to 200 ppm and 200,000 ppm sodium hypochlorite (NaClO). Differences in sanitizer effectiveness between serovars were also evaluated with attached S. Typhimurium compared to attached S. Heidelberg populations after being exposed to 200 ppm peracetic acid (PAA). Treatment with NaClO caused an average of 2.73 ± 0.23 log CFU of S. Typhimurium per coupon removed with treatment at 200 ppm while 3.36 ± 0.54 log CFU were removed at 200,000 ppm. Treatment with PAA caused an average of 2.62 ± 0.15 log CFU removed for S. Typhimurium and 1.41 ± 0.17 log CFU for S. Heidelberg (parent) and 1.61 ± 0.08 log CFU (marker). Lastly, scanning electron microscopy (SEM) was used to visualize cell attachment and coupon surface topography. SEM images showed that remaining attached cell populations were visible even after sanitizer application. Conventional plating and qPCR yielded similar levels of enumerated bacterial populations indicating a high concordance between the two methods. Therefore, qPCR could be used for the rapid quantification of Salmonella attached on RPC.     

Fecal contamination in irrigation water and microbial quality of vegetable primary production in urban farms of Metro Manila,Philippines

Microbial contamination of fresh produce can present a severe risk to public health. By conducting a rigorous survey of irrigation waters, the impacts of fecal contamination on the quality of produce could be assessed. In this study, surface waters were observed to be contaminated with Escherichia coli, Salmonella spp., and somatic coliphages. Culture methods show that out of 373 irrigation water, soil, and vegetable samples collected for a 1-year period, 232 (62.20%) were found positive for E. coli, 213 (57.26%) for somatic coliphages, and 2 (0.53%) for Salmonella spp. Out of 190 water samples, 167 (87.9%) were found to have E.coli, 174 (91.6%) have somatic coliphages, and 1 (0.5%) with Salmonella spp. In soil samples, 36 of 91 (39.6%) have E. coli, 31 (34.0%) have somatic coliphages, and none with Salmonella spp. Lastly, out of 92 vegetable samples, 29 (31.5%), 8 (8.7%), and 1 (1.1%) were found to have E. coli, somatic coliphages, and Salmonella spp., respectively. Molecular analysis confirmed the presence of bacterial contaminants. Seasonal weather conditions were noted to have an effect on the presence and number of these fecal indicator organisms. The observed data suggest that contaminated irrigation water may greatly affect the quality of fresh produce from these agricultural operations.