张媛媛计算说明书屠宰废水.doc

摘要

本设计为屠宰厂生产废水处理设计，设计过程为初步设计。屠宰废水来自于家禽、猪和牛的屠宰加工场，含有油脂、蛋白质、血污和其他有机物，若未经处理排入河流和小溪可能对环境带来危害。该屠宰废水处理厂的处理水量为1000m3/d，不考虑远期发展。原污水中各项指标：BOD5=800-1200mg/L，CODCr=1500-2000mg/L，SS=800-1500mg/L，动植物油=40-60mg/L，NH3-N=100-120mg/L，pH=6.0-9.0。
屠宰废水属于易生物降解废水，可采用两级生物处理使出水达标。预处理主要采用物理处理，包括格栅、调节池、隔油沉淀池和气浮池，主要用来去除水中的悬浮颗粒、泥沙和油污，并使处理的水质均匀，水量稳定。二级处理处理主要采用生物法，包括厌氧生物处理法中的UASB法和好氧生物处理法中的SBR法，可以有效去除水中的有机物，最后出水达到国家的有关排放标准（GB13457-1992）即：CODCr≤80mg/L，BOD5≤30mg/L，SS≤60mg/L，NH3-N≤15mg/L，pH=6.0-8.5。处理后的出水排进厂区附近的天然河道。本工程总投资为305.2万元，处理每吨水成本为2.97元。本文介绍了该工艺的特点，并有相关的屠宰废水的工艺设计过程。
关键词：屠宰废水；工艺设计；UASB；SBR
Yongfuslaughterwastewatertreatmentplantdesign
foraslaughterhouseinGuangxi
Student:ZHANGYuan-yuanTeacher:ZHANGXue-hong

Abstract：Thistopicdesignisaslaughterhousewastewatertreatmentplant.Thedegreeofthedesignisinapreliminaryphase.Effluentsfromindustrialpoultry,porcine,orbovineslaughterhousescontaininglipids,proteins,blood,andotherorganicmaterial,mightcauseenvironmentaldamageifdischargeduntreatedinriversandcreeks.Thewaterwhichneedtobetreatintheslaughterhousewastewatertreatmentplantis1000m3d,regardlessoffuturedevelopment.Thevarioustargetintherawwastewateris:BOD5=800-1200mg/L，CODCr=1500-2000mg/L，SS=800-1500mg/L,oilandgrease=40-60mg/L，NH3-N=100-120mg/L，pH=6.0-9.0.
Thequalityoftheprocessingwaterbelongstothewastewatertheteasytobebiologydegrade.Usingtwolevelsofbiologytreatmentcouldmadethewastewaterachievetheeffluentstandard.Pretreatmentmailyusethephysicalmethod,includinggrilling,regulatingreservoir,greasetrapsettlingtankandtheflotationtank,itspurposeistoremovelargesuapendedparticulatematterandtheoilsubstance.Thesecondarytreatmentusesthebiologymethods,consistsofUASBofanaerobicoxygenbiologymethodsandtheSBRoftheaerobicoxygenbiologymethods,whichcouldremovemostoftheorganics.Atlast,thewaterleakageachievedthecountryrelateddischargesstandardswhichareCODCr≤80mg/L，BOD5≤30mg/L，SS≤60mg/L，NH3-N≤15mg/L，pH=6.0-8.5.Treatedeffluentisdischargedintothenaturalrivernearthefactory.Thetotalunvestmentofthisprojectis3.052millionyuananditco